9789388751605-ALPINE-G04-EVS-I (SCIENCE)-WORKBOOK-PART2

ENVIRONMENTAL STUDIES – I (SCIENCE) by classklapTM WORKBOOK – PART 2 Enhanced ALPINE Edition SERIES Name: ___________________________________ Section: ________________ Roll No.: _________ School: __________________________________ 4 Name: ___________________________________ Section: ________________ Roll No.: _________ School: __________________________________ Alpine_Contents.indd 1 Thu 13.12.18 5:09:25 PM

Preface IMAX Program 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 Program 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. The Alpine series endeavours to be faithful to the spirit of the prescribed board curriculum. Furthermore, to facilitate comprehensive coverage, improved understanding of diverse themes and ease of implementation, the EVS curriculum has been split into EVS – I (Science) and EVS – II (Social Studies). Our books are split into two parts to manage the bag weight. They also strive to ensure inclusiveness in terms of gender and diversity in representation, catering to the heterogeneous Indian classroom. The Alpine EVS – I (Science) textbooks and workbooks offer the following features:  Interactive content that engages students through a range of open- ended questions that build curiosity and initiate 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 subject-specific vocabulary building  Integrated learning 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 – I (Science) textbooks, workbooks and teacher companion books aim to inculcate healthy habits, skills and values that promote environmentally sensitive and culturally responsive democratic citizenship among students. – The Authors Alpine_Contents.indd 2 9/7/2018 11:09:54 AM

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 Alpine_Science_V4_G4_WB_Part 2.indb 3 12/13/2018 3:21:09 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 Alpine_Science_V4_G4_WB_Part 2.indb 4 12/13/2018 3:21:10 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. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Alpine_Science_V4_G4_WB_Part 2.indb 1 1 12/13/2018 3:21:11 PM

Understanding Match the Following 8) a) strong and curved beak 9) b) broad and flat beak 10) c) thin, long and pointed beak 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 12/13/2018 3:21:11 PM Alpine_Science_V4_G4_WB_Part 2.indb 2

Long Answer Question 14) Identify the types of birds’ feet shown. Write their uses and two examples of each. Type Uses Examples a) ___________________ __________________________ _____________________ ___________________ __________________________ _____________________ ___________________ __________________________ _____________________ ___________________ __________________________ _____________________ b) ___________________ __________________________ _____________________ ___________________ __________________________ _____________________ ___________________ __________________________ _____________________ ___________________ __________________________ _____________________ 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 the reduction in the population of birds. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 18) Why do some birds travel from one place to another? Give an example of such a bird. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Birds 3 Alpine_Science_V4_G4_WB_Part 2.indb 3 12/13/2018 3:21:12 PM

Long Answer Question 19) How can we increase the number of Siberian cranes coming to India? Use the hints and write in the space given. Hints • Siberian cranes visit wetlands (land areas that have shallow water bodies). • They feed mainly on water plants. • Their number has reduced due to hunting and pollution of water bodies. a) How can __________________________________________________________________________ we protect __________________________________________________________________________ the places __________________________________________________________________________ they visit? __________________________________________________________________________ b) How can __________________________________________________________________________ we protect __________________________________________________________________________ the birds? Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) Imagine birdwatching is your hobby. Based on this, answer the questions in the space given. Question Answer a) Where would you go to watch birds? b) What materials would you need to carry with you? c) At what time of the day would you go to watch birds? d) What care would you take? 4 12/13/2018 3:21:13 PM Alpine_Science_V4_G4_WB_Part 2.indb 4

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) Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Alpine_Science_V4_G4_WB_Part 2.indb 5 5 12/13/2018 3:21:16 PM

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) Draw a labelled diagram to describe two features that help a fish to move easily in water. Ans. 6 12/13/2018 3:21:16 PM Alpine_Science_V4_G4_WB_Part 2.indb 6

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. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Animal Behaviour 7 Alpine_Science_V4_G4_WB_Part 2.indb 7 12/13/2018 3:21:17 PM

Long Answer Question 19) Explain how humans are different from other animals. Write in the space given. Use the images as hints. a) ____________________________________________________________ _______________________________________________________ b) ____________________________________________________________ _______________________________________________________ c) ____________________________________________________________ _______________________________________________________ d) ____________________________________________________________ _______________________________________________________ Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) How does the strong sense of smell in animals help them? Explain using the images as hints. a) _________________________________________________________ _________________________________________________________ _________________________________________________________ b) _________________________________________________________ _________________________________________________________ _________________________________________________________ 8 12/13/2018 3:21:20 PM Alpine_Science_V4_G4_WB_Part 2.indb 8

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. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Understanding True or False 8) In olden days, people used natural methods to store and preserve food. [       ] 9 Alpine_Science_V4_G4_WB_Part 2.indb 9 12/13/2018 3:21:20 PM

9) We put sugar in pickles to preserve. [       ] 10) Ice creams are stored in deep freezers to preserve them.  [       ] 11) Leafy vegetables are mostly preserved by drying them in the Sun.  [       ] Short Answer Questions 12) What is food storage? Why is it important? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 13) How are the following food items stored? a) food grains like rice, wheat b) milk Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 14) ‘We preserve food to use it later’. Based on this, answer the following questions. a) What is food preservation? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ b) Identify the method of food preservation shown in the images given below. Ans. A) B) ______________________________________ ______________________________________ ______________________________________ ______________________________________ 10 12/13/2018 3:21:21 PM Alpine_Science_V4_G4_WB_Part 2.indb 10

C) D) ______________________________________ ______________________________________ ______________________________________ ______________________________________ 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. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Food Storage 11 Alpine_Science_V4_G4_WB_Part 2.indb 11 12/13/2018 3:21:21 PM

Long Answer Question 19) Why do we preserve mangoes? Use the images as hints. Hints Reason a) ____________________________________________________________ winter summer ____________________________________________________________ b) ____________________________________________________________ ____________________________________________________________ Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) We carry food items when we travel. What precautions should we take to prevent the food from spoiling? Use the given hints. a) Kind of food to carry ____________________________________________ ____________________________________________ b) Care to be taken for packing cooked ____________________________________________ food ____________________________________________ c) Care to be taken while packing the ____________________________________________ food ____________________________________________ d) Storing the packed food ____________________________________________ ____________________________________________ 12 12/13/2018 3:21:23 PM Alpine_Science_V4_G4_WB_Part 2.indb 12

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. ____________________________________________________________________________________ Alpine_Science_V4_G4_WB_Part 2.indb 13 13 12/13/2018 3:21:23 PM

Short Answer Question 7) Why do we use glass in constructing houses? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 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 picture? What is it used for? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 14) Write the steps involved in making bricks. Use the images as hints. 14 12/13/2018 3:21:24 PM Alpine_Science_V4_G4_WB_Part 2.indb 14

Step 1: __________________________________________________________ __________________________________________________________ Step 2: __________________________________________________________ __________________________________________________________ Step 3: __________________________________________________________ __________________________________________________________ Step 4: __________________________________________________________ __________________________________________________________ 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. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Building Materials 15 Alpine_Science_V4_G4_WB_Part 2.indb 15 12/13/2018 3:21:25 PM

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. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) Tick the house that may survive a ground shake. Why? a) b) Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 16 12/13/2018 3:21:27 PM Alpine_Science_V4_G4_WB_Part 2.indb 16

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. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Alpine_Science_V4_G4_WB_Part 2.indb 17 17 12/13/2018 3:21:28 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 12/13/2018 3:21:29 PM Alpine_Science_V4_G4_WB_Part 2.indb 18

Long Answer Question 14) Answer the following questions based on the jute plant. a) In which season and _________________________________________________________ area does it grow? _________________________________________________________ b) How do we make jute _________________________________________________________ cloth? _________________________________________________________ c) W hat do we make _________________________________________________________ from jute threads? _________________________________________________________ Application Multiple Choice Questions [   ] 15) Name the process shown in the picture. (A) dyeing (B) printing (C) mixing (D) weaving 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. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Types of Cloth 19 Alpine_Science_V4_G4_WB_Part 2.indb 19 12/13/2018 3:21:29 PM

18) State a difference between natural and synthetic dyes. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 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? Write on the following points. ______________________________________________________________ a) Cleaning ______________________________________________________________ b) Drying ______________________________________________________________ ______________________________________________________________ ______________________________________________________________ c) Free from wrinkles ______________________________________________________________ d) Storing ______________________________________________________________ ______________________________________________________________ 20 12/13/2018 3:21:29 PM Alpine_Science_V4_G4_WB_Part 2.indb 20

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. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Alpine_Science_V4_G4_WB_Part 2.indb 21 21 12/13/2018 3:21:30 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 12/13/2018 3:21:30 PM Alpine_Science_V4_G4_WB_Part 2.indb 22

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 to him the reasons for using fuels carefully. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Fuels 23 Alpine_Science_V4_G4_WB_Part 2.indb 23 12/13/2018 3:21:30 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 12/13/2018 3:21:31 PM Alpine_Science_V4_G4_WB_Part 2.indb 24

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. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Alpine_Science_V4_G4_WB_Part 2.indb 25 25 12/13/2018 3:21:31 PM

Understanding Match the Following 8)  a) envelope with letter 9) 10) b) postbox 11) c) postcard 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. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 14) How do mobile phones use radio waves to send and receive information? Use the images as hints and write in the space provided. 26 12/13/2018 3:21:32 PM Alpine_Science_V4_G4_WB_Part 2.indb 26

______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ ______________________________________________________ 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) We 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 Alpine_Science_V4_G4_WB_Part 2.indb 27 12/13/2018 3:21:33 PM

18) Give examples of social networking media of communication. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 19) What are the benefits and problems of communication media? Benefits Problems _________________________________________ _________________________________________ _________________________________________ _________________________________________ _________________________________________ _________________________________________ _________________________________________ _________________________________________ Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) Prepare a birthday message for your friend using pictographs. Ans. 28 12/13/2018 3:21:33 PM Alpine_Science_V4_G4_WB_Part 2.indb 28

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. ____________________________________________________________________________________ Alpine_Science_V4_G4_WB_Part 2.indb 29 29 12/13/2018 3:21:34 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 12/13/2018 3:21:35 PM Alpine_Science_V4_G4_WB_Part 2.indb 30

____________________________________________________________________________________ ____________________________________________________________________________________ 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 Alpine_Science_V4_G4_WB_Part 2.indb 31 12/13/2018 3:21:35 PM

Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 19) How can we say that work is done in the following situation? Lifting a bottle kept on the table. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) Read the statements given below. Tick () where work is done and cross () 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 at 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 12/13/2018 3:21:35 PM Alpine_Science_V4_G4_WB_Part 2.indb 32

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. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Alpine_Science_V4_G4_WB_Part 2.indb 33 33 12/13/2018 3:21:36 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) What are the uses of electricity? Use the images as hints. a) ________________________ b) ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ 34 12/13/2018 3:21:40 PM Alpine_Science_V4_G4_WB_Part 2.indb 34

c) ________________________ d) ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ e) ________________________ f) ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ g) ________________________ h) ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ ________________________ 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 picture? Give another use of electrical energy. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Forms of Energy 35 Alpine_Science_V4_G4_WB_Part 2.indb 35 12/13/2018 3:21:42 PM

18) Which use of energy is shown in the picture? State how it is helpful in our daily life. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 19) Write the uses of energy based on the following images. a) b) c) d) _____________________ _____________________ _____________________ _____________________ _____________________ _____________________ _____________________ _____________________ 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 12/13/2018 3:21:46 PM Alpine_Science_V4_G4_WB_Part 2.indb 36