Alpine-G4-Workbook-Science-Part2

A PRODUCT OF CLASSKLAP SCIENCE WORKBOOK - PART 2 ALPINE SERIES Latest Edition 4 Name: ___________________________________ Section: ________________ Roll No.: _________ School: __________________________________ 181010041-Alpine-G4-Workbook-Science-Part2.pdf 1 2/1/2018 4:27:26 PM

Preface IMAX partners with schools, supporting them with learning materials and processes that are all crafted to work together as an interconnected system to drive learning. IMAX presents the latest version of the Alpine series – updated and revised after considering the perceptive feedback and comments shared by our experienced reviewers and users. Designed specifically for state board schools, the Alpine series endeavours to be faithful to the spirit of the State Curriculum Framework and the National Curriculum Framework (NCF) 2005. Therefore, our books strive to ensure inclusiveness in terms of gender and diversity in representation, catering to the heterogeneous Indian classroom. The larger aim of the NCF 2005 regarding science teaching is to acknowledge and address the dynamic nature of science by focusing on the development of skills to acquire and process information scientifically. The Alpine EVS/Science textbooks and workbooks for state board schools offer the following features:  Interactive content that engages students through a range of open- ended questions that build curiosity and initiate scientific exploration  Opportunities for experimentation, analysis and synthesis of ideas and concepts  Exposure to locally relevant environmental problem solving  Effective use of visual elements to enable learning of structures, processes and phenomena  A focus on science-specific vocabulary building  Integrated education of values and life skills  Promotion of participatory and contextualised learning through the engagement of all relevant stakeholders in the learning process Overall, the IMAX Alpine EVS/Science textbooks, workbooks and teacher companion books aim to enhance the development of scientific temper along with the inculcation of healthy habits, skills and values that promote environmentally sensitive and culturally responsive democratic citizenship among students. – The Authors 181010041-Alpine-G4-Workbook-Science-Part2.pdf 2 2/1/2018 4:27:27 PM

Workbook Features Remembering Understanding Questions aimed at helping students to Questions aimed at helping students recollect critical information regarding engage with the ‘how’ and ‘why’ of the ‘who’, ‘what’, ‘when’ and ‘where’ of the concept the concept Application Applying the understanding of the concept to questions related to real-life scenarios Higher Order Thinking Skills (H.O.T.S.) Extending the application of the concept to more advanced and challenging questions that meet the criteria of higher order thinking skills 181010041-Alpine-G4-Workbook-Science-Part2.pdf 3 2/1/2018 4:27:27 PM

Contents 4Class 9 Birds..............................................................................................................................1 1 0 Animal Behaviour........................................................................................................5 1 1 Food Storage...............................................................................................................9 1 2 Building Materials......................................................................................................13 1 3 Types of Cloth............................................................................................................17 1 4 Fuels...........................................................................................................................21 1 5 Ways of Communication..........................................................................................25 1 6 Force and Work.........................................................................................................29 1 7 Forms of Energy.........................................................................................................33 181010041-Alpine-G4-Workbook-Science-Part2.pdf 4 2/1/2018 4:27:27 PM

Lesson 9 Birds Remembering Multiple Choice Questions [    ] 1) From the following, identify the bird that cannot fly. (A) crow (B) eagle (C) ostrich (D) parrot 2) Which of the following features is not seen in birds? [    ] (A) wings (B) legs (C) feathers (D) teeth Fill in the Blanks 3) ___________________________ are soft hair present all over the body of birds. 4) All _________________________ have beaks. Very Short Answer Questions 5) Name a bird that spends most of its life in the sea. Ans. ____________________________________________________________________________________ 6) What do we call the curved nails present on the feet of birds? Ans. ____________________________________________________________________________________ Short Answer Question 7) Write the special features of birds that make them look different from other animals. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 181010041-Alpine-G4-Workbook-Science-Part2.pdf 5 1 2/1/2018 4:27:28 PM

Understanding a) strong and curved beak Match the Following b) broad and flat beak c) thin, long and pointed beak 8) 9) 10) 11) d) chisel-like beak Short Answer Questions 12) Name any two types of sounds made by birds. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 13) Why do the ducks have webbed feet? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 2 2/1/2018 4:27:28 PM 181010041-Alpine-G4-Workbook-Science-Part2.pdf 6

Long Answer Question 14) Look at the pictures below. Name the types of feet shown. Write how they are helpful to the birds. a) b) Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Application Multiple Choice Questions [     ] 15) Identify the bird in the given picture.  (A) sparrow (B) Siberian crane (C) ostrich (D) vulture 16) Which of the following birds is about to become extinct?  [     ] (A) pigeon (B) eagle (C) red-headed vulture (D) crane Short Answer Questions 17) State any two factors responsible for reducing the population of birds. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Birds 3 181010041-Alpine-G4-Workbook-Science-Part2.pdf 7 2/1/2018 4:27:28 PM

18) Why do some birds travel from one place to another? Give an example of such a bird. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 19) What steps can we take to increase the number of birds like the Siberian crane, coming to India? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) Do any of your friends or relatives have a hobby of birdwatching? Do you know what birdwatching is? How can it be done? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 4 2/1/2018 4:27:28 PM 181010041-Alpine-G4-Workbook-Science-Part2.pdf 8

Lesson 10 Animal Behaviour Remembering Multiple Choice Questions [     ] 1) Which of the following animals does not live in a group? (A) elephant (B) tiger (C) deer (D) bison 2) Which of the following animals sleeps continuously for many days during the summer season?[    ] (A) bear (B) bat (C) crocodile (D) ground squirrel Fill in the Blanks 3) ____________________________ has a long nose developed into a trunk. 4) Tigers have ears facing _______________________________. Very Short Answer Questions 5) Name the animal that marks its area by rubbing itself against the plants in that area. Ans. ____________________________________________________________________________________ 6) Name any one animal which lives in a group. Ans. ____________________________________________________________________________________ Short Answer Question 7) Name the following animals that do not live in one place throughout the year. a) b) 181010041-Alpine-G4-Workbook-Science-Part2.pdf 9 5 2/1/2018 4:27:28 PM

Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Understanding True or False 8) Monkeys have long tails which help them to jump from one tree to another. [       ] 9) The young ones of animals are not looked after if living in groups. [       ] 10) Animals living in cold regions have thin hair to protect themselves from the cold.  [      ] 11) Area marking prevents an animal from entering into another animal’s area.  [      ] Short Answer Questions 12) How is the trunk useful to elephants? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 13) State any one benefit that animals have by living in groups. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 14) State any two special features that help the fish to live in water. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 6 2/1/2018 4:27:28 PM 181010041-Alpine-G4-Workbook-Science-Part2.pdf 10

Application Multiple Choice Questions [      ] 15) What does the given picture show?  (A) a shelter for animals (B) a home for human beings (C) a group of animals (D) a group of human beings 16) Which of the following statements is not true?[     ] (A) Animals build shelters for their protection. (B) Animals may live together in groups. (C) Animals follow the rules of their group. (D) Animals do not need any kind of protection from tough weather. Short Answer Questions 17) We build houses to protect ourselves from extreme weather conditions. Asif wants to know what animals do to protect themselves. Explain it to him. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 18) Do we live in groups like animals? What do we call our groups? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 19) We discussed many similarities between animals and human beings. List four differences between animals and human beings. Ans. ____________________________________________________________________________________ Animal Behaviour 7 181010041-Alpine-G4-Workbook-Science-Part2.pdf 11 2/1/2018 4:27:28 PM

____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) How does the strong sense of smell help animals? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 8 2/1/2018 4:27:28 PM 181010041-Alpine-G4-Workbook-Science-Part2.pdf 12

Lesson 11 Food Storage Remembering Multiple Choice Questions 1) Which of the following is a sign of spoilt food? [     ] (A) pleasant smell (B) good taste (C) no change in look (D) growth of some fluffy structures over the food 2) Which of the following food items would get spoilt faster? [     ] (A) curry (B) biscuits (C) chips (D) wheat grains Fill in the Blanks 3) Microorganisms grow faster in a _______________________ climate. 4) ____________________________ that spoil the food cannot be seen with our naked eyes. Very Short Answer Questions 5) What do we call the food that becomes harmful for our health? Ans. ____________________________________________________________________________________ 6) What should we check before buying any packed food item from the market? Ans. ____________________________________________________________________________________ Short Answer Question 7) What is food spoilage? Name any one microorganism that spoils food. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 181010041-Alpine-G4-Workbook-Science-Part2.pdf 13 9 2/1/2018 4:27:28 PM

Understanding True or False 8) In olden days, people used natural methods to store and preserve food. [       ] 9) We put sugar in pickles to preserve them. [       ] 10) Ice creams are stored in deep freezers to preserve.  [       ] 11) Leafy vegetables are mostly preserved by drying them in the Sun.  [       ] Short Answer Questions 12) What is food storage? Why it is important? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 13) How are the following food items stored? a) food grains like rice, wheat b) milk Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 14) What is food preservation? Name any two methods to preserve food. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 10 2/1/2018 4:27:28 PM 181010041-Alpine-G4-Workbook-Science-Part2.pdf 14

Application Multiple Choice Questions [      ] 15) Which of the following adds texture to the food and preserves it as well?  (A) storing in a plastic container (B) adding sugar (C) storing in jute bags (D) storing in plastic bags 16) Which of the following methods is used to get mango jellies throughout the year? [      ] (A) salting (B) pickling (C) canning (D) keeping in granaries Short Answer Questions 17) Rita wants to know what happens to the food if we do not use any preservation method. Explain it to her. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 18) How can we make seasonal food available throughout the year? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 19) Why do we preserve food? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Food Storage 11 181010041-Alpine-G4-Workbook-Science-Part2.pdf 15 2/1/2018 4:27:28 PM

Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) Renu is going out of the city for a week. She needs to carry some food items with her. What precautions should she take to prevent the food from spoiling? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 12 2/1/2018 4:27:28 PM 181010041-Alpine-G4-Workbook-Science-Part2.pdf 16

Lesson 12 Building Materials Remembering Multiple Choice Questions [     ] 1) What do the people living in hot climate use to build houses? (A) stone (B) wood (C) ice (D) iron 2) Who does all the woodwork while constructing a house? [     ] (A) mason (B) carpenter (C) architect (D) potter Fill in the Blanks 3) _____________________________ protects the walls and makes them look beautiful. 4) Wooden houses are mostly found in areas with ________________________ climate. Very Short Answer Questions 5) Give an example of a material used for building a house. Ans. ____________________________________________________________________________________ 6) Give an example of a machine used for building a house. Ans. ____________________________________________________________________________________ Short Answer Question 7) Why do we use glass in constructing houses? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 181010041-Alpine-G4-Workbook-Science-Part2.pdf 17 13 2/1/2018 4:27:28 PM

Understanding True or False 8) While preparing the clay for bricks, mixing is done to make the clayey soil smooth and uniform.  [      ] 9) Moulds are not used to shape the bricks; it is done with hands. [       ] 10) Bricks are fired to make them soft.  [       ] 11) A kiln cools down immediately after firing.  [       ] Short Answer Questions 12) What are bricks mostly made of? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 13) What is shown in the given picture? What is it used for? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 14) Write the steps involved in making bricks. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 14 2/1/2018 4:27:28 PM 181010041-Alpine-G4-Workbook-Science-Part2.pdf 18

Application Multiple Choice Questions 15) What are the large buildings built by Maharajas that provided housing to several people called?  [      ] (A) verandas (B) bungalows (C) forts (D) terraces 16) Why did forts not get hot inside? [      ] (A) because their doors were kept closed all the time (B) because they had electric fans (C) because they had high ceilings and small windows near the roof (D) because water was sprayed on them all the time Short Answer Questions 17) What ensured hygienic conditions inside the forts? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 18) Name any two things in your house that keep it cool and airy. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 19) Identify the fort in the given picture. Describe its interior in a few lines. Building Materials 15 181010041-Alpine-G4-Workbook-Science-Part2.pdf 19 2/1/2018 4:27:28 PM

Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) Though many pucca houses collapse in earthquakes, how does the Bhunga house remain unaffected? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 16 2/1/2018 4:27:28 PM 181010041-Alpine-G4-Workbook-Science-Part2.pdf 20

Lesson 13 Types of Cloth Remembering Multiple Choice Questions 1) Identify the plant fibre from the following. [     ] (A) silk (B) wool (C) cotton (D) leather 2) Which of the following is an artificial (synthetic) fibre? [     ] (A) nylon (B) jute (C) cotton (D) leather Fill in the Blanks 3) __________________________ is mostly obtained from the fleece of sheep or goat. 4) ___________________________ fibres are obtained from natural resources like plants or animals. Very Short Answer Questions 5) What are clothes made of? Ans. ____________________________________________________________________________________ 6) How is silk fibre drawn? Ans. ____________________________________________________________________________________ Short Answer Question 7) Name the fibres in the given pictures. a) b) Ans. ____________________________________________________________________________________ 181010041-Alpine-G4-Workbook-Science-Part2.pdf 21 17 2/1/2018 4:27:28 PM

____________________________________________________________________________________ ____________________________________________________________________________________ Understanding Match the Following 8)  a) weaving 9) b) spinning machine 10) c) machine separating seeds from cotton bolls 11) d) hand spinning Short Answer Questions 12) What are cotton bolls? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 13) What is yarn? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 18 2/1/2018 4:27:29 PM 181010041-Alpine-G4-Workbook-Science-Part2.pdf 22

Long Answer Question 14) How is jute fibre made from the jute plant? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Application Multiple Choice Questions 15) Name the process shown in the given picture. [     ] (A) dyeing (B) printing (C) mixing (D) carding 16) What is done in block printing?[     ] (A) Mixing of different colours is done to print on cloth. (B) A block of design is used to make prints on cloth. (C) Cloth is whitened. (D) Two sets of yarns are arranged together. Short Answer Questions 17) Why do clothes look beautiful? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 18) State a difference between natural and synthetic dyes. Ans. ____________________________________________________________________________________ Types of Cloth 19 181010041-Alpine-G4-Workbook-Science-Part2.pdf 23 2/1/2018 4:27:29 PM

____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 19) Draw a design for making a printing block of your choice. Ans. Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) How should we take care of woollen and silk clothes? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 20 2/1/2018 4:27:29 PM 181010041-Alpine-G4-Workbook-Science-Part2.pdf 24

Lesson 14 Fuels Remembering Multiple Choice Questions [     ] 1) From the following, Identify the fuel in solid form. [     ] (A) petrol (B) firewood (C) LPG (D) diesel 2) How are fossil fuels dug out? (A) through crushing (B) through mining (C) through grinding (D) through mixing Fill in the Blanks 3) Vehicles get energy to run from _____________________. 4) Natural gas is a fuel in _________________________________ form. Very Short Answer Questions 5) Give an example of domestic fuel in liquid form. Ans. ____________________________________________________________________________________ 6) What do we call a hole dug into the ground to take out fuels? Ans. ____________________________________________________________________________________ Short Answer Question 7) What are fossil fuels? Give an example. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 181010041-Alpine-G4-Workbook-Science-Part2.pdf 25 21 2/1/2018 4:27:29 PM

Understanding True or False [       ] 8) Motor fuels are generally used to run vehicles.  [      ] 9) Aeroplanes run on electricity. [       ] 10) Petrol is the most common fuel used in two-wheelers today. [       ] 11) Boats and ships with power engines mostly use water as a fuel. Short Answer Questions 12) What are motor fuels? Where do we get them from? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 13) Name any two road vehicles that run on diesel. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 14) State the uses of the following: a) CNG b) LPG Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 22 2/1/2018 4:27:29 PM 181010041-Alpine-G4-Workbook-Science-Part2.pdf 26

Application Multiple Choice Questions 15) Which of the following can be done to save fuels?  [     ] (A) using vehicles for walkable distances (B) not using public transport (C) switching off vehicles at signals (D) not taking care of our vehicles 16) Which of the following is not obtained from fossil fuels? [     ] (A) plastic (B) glass (C) medicines (D) cosmetics Short Answer Questions 17) Do you have a vehicle at home? What do your parents and you do to take care of it so that it consumes less fuel? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 18) Write whether Right or Wrong: a) Some people use bicycles in place of motor vehicles to save fuel. [       ] b) People should never use carpooling (sharing car) though it saves fuel. [       ] Long Answer Question 19) Ashraf has seen many petrol pumps and shops for LPG everywhere. He wonders why we should use fuel carefully if so much fuel is available anyway. Explain him the reasons for using fuels carefully. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Fuels 23 181010041-Alpine-G4-Workbook-Science-Part2.pdf 27 2/1/2018 4:27:29 PM

____________________________________________________________________________________ ____________________________________________________________________________________ Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) Distinguish between renewable and non-renewable fuels. Ans. Renewable fuels Non-renewable fuels _______________________________________ _______________________________________ ____________________________________ ____________________________________ ____________________________________ ____________________________________ ____________________________________ ____________________________________ ____________________________________ ____________________________________ ____________________________________ ____________________________________ 24 2/1/2018 4:27:29 PM 181010041-Alpine-G4-Workbook-Science-Part2.pdf 28

Lesson 15 Ways of Communication Remembering Multiple Choice Questions 1) What means of communication should we use to communicate with less number of people? [   ] (A) television (B) radio (C) newspaper (D) telephone 2) Which of the following is a written form of communication? [     ] (A) letter (B) television (C) telephone (D) radio Fill in the Blanks 3) _____________________________________ can be between a few people or many people. 4) Radio, internet and newspaper are the ways to share _______________________________. Very Short Answer Questions 5) Give an example of communication in audio form. Ans. ____________________________________________________________________________________ 6) Give an example of communication with many people. Ans. ____________________________________________________________________________________ Short Answer Question 7) When does communication occur? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 181010041-Alpine-G4-Workbook-Science-Part2.pdf 29 25 2/1/2018 4:27:29 PM

Understanding Match the Following 8)  a) envelope with letter 9) b) postbox 10) c) postcard 11) d) inland letter Short Answer Questions 12) How do we mostly send letters these days? How is it better than using a postcard? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 13) What happens to the letters that we put in a postbox? Ans. ____________________________________________________________________________________ 26 181010041-Alpine-G4-Workbook-Science-Part2.pdf 30 2/1/2018 4:27:29 PM

____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 14) How can we talk to a person using a mobile phone? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Application Multiple Choice Questions 15) Which of the following is a benefit of using computers and mobile phones?  [     ] (A) Bright screens of computers may harm our eyes. (B) W e can spend a lot of time playing video games on mobiles which may affect our health. (C) We can stay in touch with our family and friends. (D) Earphones that we use may be harmful to our ears. 16) Which of the following health problems is caused mostly due to the overuse of mobile phones? [   ] (A) fever (B) pain in legs (C) stomach problems (D) eye problems Short Answer Questions 17) How can we learn new things from the internet? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Ways of Communication 27 181010041-Alpine-G4-Workbook-Science-Part2.pdf 31 2/1/2018 4:27:29 PM

18) Give examples of social networking media of communication. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 19) Discuss the benefits and problems of communication media. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) Prepare a birthday message for your friend using pictographs. Ans. 28 2/1/2018 4:27:29 PM 181010041-Alpine-G4-Workbook-Science-Part2.pdf 32

Lesson 16 Force and Work Remembering Multiple Choice Questions 1) Why is force applied in the given picture? [   ] (A) for pushing (B) for pulling (C) for both pushing and pulling (D) for changing shape 2) What is the child in the given picture doing? [   ] (A) applying force to stop the ball (B) applying force to change the shape of the ball (C) applying force to change the direction of the ball (D) breaking the ball into two pieces Fill in the Blanks 3) Depending on the applied ____________________________, objects move faster or slower. 4) If we press against a plastic bottle, its ___________________________ will change. Very Short Answer Questions 5) What type of force is shown in the given picture? (Push/ Pull) Ans. ____________________________________________________________________________________ 6) How can we burst a fully blown balloon using force? Ans. ____________________________________________________________________________________ 181010041-Alpine-G4-Workbook-Science-Part2.pdf 33 29 2/1/2018 4:27:29 PM

Short Answer Question 7) When do we need to apply force? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Understanding True or False 8) A smooth surface causes more friction.  [       ] 9) The raindrops are pulled towards the ground by the force of friction.  [       ] 10) Friction helps us to hold things tight. [       ] 11) Without friction, moving things will not stop. [       ] Short Answer Questions 12) Give two examples of the force of gravity. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 13) How does oil help to reduce friction? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 14) Write a note on friction. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 30 181010041-Alpine-G4-Workbook-Science-Part2.pdf 34 2/1/2018 4:27:29 PM

____________________________________________________________________________________ Application Multiple Choice Questions [     ] 15) Choose the incorrect statement from the given statements.  (A) When we put force on an object and move it, we do work. (B) When we hit a ball using a bat, there is no work done. (C) We do work when we pick up a box from the ground. (D) If we make a pot from clay, there is work done. 16) In which of the following situations is work done? [     ] (A) Munaf is sitting on a chair. (B) A car is parked in a garage. (C) Ana lifted a heavy box from the ground. (D) Tanya is watching a movie. Short Answer Questions 17) When is work said to be done? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 18) Look at the given picture. Can we say that work is done? Give a reason. Force and Work 31 181010041-Alpine-G4-Workbook-Science-Part2.pdf 35 2/1/2018 4:27:29 PM

Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 19) How can we say that work is done in the following situation? We pick up a bottle kept on the table. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) Read the statements given below. Mark  where work is done and  where work is not done. a) Ravi is carrying a heavy bag in his hand and sitting in one place. b) Raju is reading a book sitting on a table. c) Rashi is watching TV sitting on a chair. d) Rina is walking up the stairs with a small bag on her shoulder. 32 2/1/2018 4:27:29 PM 181010041-Alpine-G4-Workbook-Science-Part2.pdf 36

Lesson 17 Forms of Energy Remembering Multiple Choice Questions [     ] 1) Which of the following is the basic source of energy on the Earth? (A) fuel (B) wind (C) water (D) Sun 2) Which of the following provides heat and light naturally? [     ] (A) wind energy (B) water (C) solar energy (D) food Fill in the Blanks 3) The energy we get from the Sun is called _____________________________________. 4) Vehicles get energy from ___________________________________. Very Short Answer Questions 5) State any one natural source of energy. Ans. ____________________________________________________________________________________ 6) Name a source of energy which is limited. Ans. ____________________________________________________________________________________ Short Answer Question 7) What is the use of solar energy for plants? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 181010041-Alpine-G4-Workbook-Science-Part2.pdf 37 33 2/1/2018 4:27:29 PM

Understanding Match the Following 8) fans and bulbs get energy from a) light energy 9) objects thrown upwards come down due to b) heat energy 10) the form of energy we can see is c) electricity 11) we feel warmth because of d) gravity Short Answer Questions 12) Identify the sources of energy being used in the following pictures. a) b) _________________________________ ____________________________________ 13) What will happen if you throw an eraser in the upward direction? Which energy is used in this case? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 14) How is electricity one of the most useful energy sources? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 34 2/1/2018 4:27:29 PM 181010041-Alpine-G4-Workbook-Science-Part2.pdf 38

____________________________________________________________________________________ ____________________________________________________________________________________ Application [     ] [     ] Multiple Choice Questions 15) Which of the following forms of energy lights up tube lights?  (A) electricity (B) gravity (C) elastic (D) sound 16) Which of the following forms of energy will we use to cook our food? (A) water (B) wind (C) heat (D) sound Short Answer Questions 17) Which use of electrical energy is shown in the given picture? Give another use of electrical energy. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 18) Which use of energy is shown in the given picture? State how it is helpful in our daily life. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Forms of Energy 35 181010041-Alpine-G4-Workbook-Science-Part2.pdf 39 2/1/2018 4:27:29 PM

Long Answer Question 19) State any four uses of energy. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) Make a poster using a chart paper on ‘how to conserve energy’. You may use the following points: • turning off electrical devices when not in use • recycling of paper • using renewable sources of energy • minimising the use of plastic 36 2/1/2018 4:27:29 PM 181010041-Alpine-G4-Workbook-Science-Part2.pdf 40