EVS – I (SCIENCE) WORKBOOK – PART 2 5 Name: ___________________________________ Section: ________________ Roll No.: _________ School: __________________________________
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 Program presents the latest version of the Magnolia series – updated and revised after considering the perceptive feedback and comments shared by our experienced reviewers and users. The Magnolia 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 Magnolia 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 Magnolia 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
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
Contents 5Class 7 Food for Animals����������������������������������������������������������������������������������������������������������1 8 Food Production�����������������������������������������������������������������������������������������������������������5 9 Forests as Shelter����������������������������������������������������������������������������������������������������������9 1 0 Space Travel���������������������������������������������������������������������������������������������������������������13 1 1 Wildfire�������������������������������������������������������������������������������������������������������������������������17 1 2 Cyclones and Floods�������������������������������������������������������������������������������������������������21 1 3 Earthquakes and Tsunami......................................................................................... 25 1 4 Simple Machines........................................................................................................ 29
Lesson 7 Food for Animals Remembering Multiple Choice Questions [ ] 1) Identify the omnivore from the following. (A) tiger (B) cow (C) deer (D) human being 2) What do we call the animals that eat only plant parts as their food? [ ] (A) carnivores (B) omnivores (C) herbivores (D) parasites Fill in the Blanks 3) ____________________________ cannot make their own food. 4) ___________________________ are animals that feed on other animals. Very Short Answer Questions 5) Give any one example of a carnivore. Ans. ____________________________________________________________________________________ 6) Name the omnivore shown in the picture. Ans. ____________________________________________________________________________________ Short Answer Question 7) Complete the following: a) herbivores types of animals based b) ____________________________________________________________ on eating habits c) ____________________________________________________________ 1
Understanding True or False [ ] 8) Animals find their food with the help of their senses. 9) Cows have pointed teeth. [ ] 10) A frog uses its teeth to catch its prey. [ ] 11) Cats have a sharp sense of hearing. [ ] Short Answer Questions 12) What kind of front teeth do rabbits have? How do they help them? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 13) Give any two examples for each of the following: a) animals having sharp, pointed teeth b) animals that use their tongue to catch their prey Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 14) Complete the following table by listing the features that help these animals find food from their surroundings. Also, name an animal who shares the same feature. S. No. Animal Feature that helps them Example of another animal a) find food having the same feature __________________________________ _____________________________ __________________________________ _____________________________ b) __________________________________ _____________________________ __________________________________ _____________________________ 2
S. No. Animal Feature that helps them Example of another animal c) find food having the same feature d) __________________________________ _____________________________ __________________________________ _____________________________ __________________________________ _____________________________ __________________________________ _____________________________ Application Multiple Choice Questions 15) Which of the following do plants use to prepare food? [ ] (A) oxygen (B) carbon dioxide (C) seeds (D) soil 16) Which of the following is an example of a food chain? [ ] (A) corn is eaten up by a rat, and the rat is eaten up by an owl (B) new plantlet produced from a seed (C) frog eating carrots (D) fox eating grass and rabbit eating grass Short Answer Questions 17) What is a food chain? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 18) Give an example of a food chain with at least four members. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Food for Animals 3
Long Answer Question 19) What forms a food web? Explain with the help of a diagram. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) Look at the given food web. If harmful chemicals get mixed with the water of the pond, what will happen to the Siberian crane? Give reasons. _______________________________________________ _______________________________________________ _______________________________________________ _______________________________________________ _______________________________________________ _______________________________________________ _______________________________________________ _______________________________________________ 4
Lesson 8 Food Production Remembering Multiple Choice Questions 1) Which of the following animals are raised on farms by farmers? [ ] [ ] (A) goat (B) squirrel (C) crow (D) mouse 2) What do we call the people who do farming? (A) potters (B) farmers (C) gardeners (D) weavers Fill in the Blanks 3) A _______________ is a piece of land used to grow crops. 4) Generally, animals giving milk, ____________ and ____________ are raised on farms. Very Short Answer Questions 5) What is the practice of growing useful plants and raising livestock on farms called? Ans. ____________________________________________________________________________________ 6) Give an example of plants grown on farms. Ans. ____________________________________________________________________________________ Short Answer Question 7) What types of animals are reared on farms? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Understanding True or False [ ] 8) A plough is used to prepare the soil for sowing seeds. 5
9) Some farmers water their fields using sprinklers. [ ] 10) Plantlets grow from the flowers directly. [ ] 11) For some plants to grow, the entire field needs to be flooded with water. [ ] Short Answer Questions 12) What is sowing? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 13) Why are some nutrient-rich materials added to the soil in the fields? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 14) What is harvesting? How is it done? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Application [ ] Multiple Choice Questions 15) What is shown in the given picture? (A) vegetable market (B) shop (C) godown (D) farm 6
16) The harvested food grains must be stored in a safe place, otherwise: [ ] (A) the food grains will get spoilt. (B) insects will not get anything to eat. (C) unwanted plants may grow in the food grains. (D) we will make various food items from them. Short Answer Questions 17) Name the following: a) places where harvested food grains are stored b) the place where we buy the food grains from Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 18) What care should be taken while storing the food in the godowns? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 19) Write the journey of food grains from farms to local markets. Use the images as hints. a) _____________________ b) _____________________ _____________________ _____________________ _____________________ _____________________ _____________________ _____________________ d) _____________________ c) _____________________ _____________________ _____________________ _____________________ _____________________ _____________________ _____________________ Food Production 7
Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) U sing the clues given, find out words that are related to environment-friendly farming and complete the crossword. Across a) An organism that is good to have in the soil and should not get killed. c) These should not be used for killing pests and insects on farms. Down b) It is mostly derived from animal waste. Adding it provides nutrients to the soil. d) Decayed vegetable matter that can be used to fertilise crops. b) d) a) E W C A c) C E S 8
Lesson 9 Forests as Shelter Remembering Multiple Choice Questions 1) What do we call a piece of land with many trees that have grown on their own? [ ] (A) desert (B) coast (C) mountain (D) forest 2) Forests in cold mountains mostly have trees with: [ ] (A) yellow leaves throughout the year (B) broad leaves (C) needle-like leaves (D) no leaves throughout the year Fill in the Blanks 3) In some forests, during the __________________________________ season, the colour of the leaves turns yellow. 4) Usually, trees in a __________________________ are not grown by people. Very Short Answer Questions 5) What type of trees are shown in the given picture? Ans. ____________________________________________________________________________________ 9
6) What type of trees do forests in warm areas with high rainfall have? Ans. ____________________________________________________________________________________ Short Answer Question 7) What are evergreen rainforests? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Understanding True or False 8) In a forest, branches of trees spread forming a cover overhead. [ ] 9) Forests do not provide shelter to any birds. [ ] 10) The soil in the forest helps in the growth of plants. [ ] 11) The people living in the forest eat the fruits, seeds and roots of forest plants. [ ] Short Answer Questions 12) Name two shelters built by insects in forests. Also, name the insects that build these shelters. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 13) Generally, what type of soil is found in forests? Name any two animals that we may find in this soil. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 10
Long Answer Question 14) Use the hints to compare and contrast the life of people in forests with those in cities. People in a forest People of a city Food _____________________________________ _____________________________________ _____________________________________ _____________________________________ Water _____________________________________ _____________________________________ _____________________________________ _____________________________________ Language _____________________________________ _____________________________________ _____________________________________ _____________________________________ Shelter _____________________________________ _____________________________________ _____________________________________ _____________________________________ Application Multiple Choice Questions 15) The soil from forests does not get washed away during rains because: [ ] (A) the roots of the plants hold the soil. (B) the birds from the forests hold the soil. (C) the stems of the plants hold the soil. (D) all the forests have bunds built in them. 16) Which of the following do we generally get from forests? [ ] (A) glass (B) gum (C) plastic (D) milk Short Answer Questions 17) How do plants keep the air cool and fresh? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Forests as Shelter 11
18) Write any two uses of forests. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 19) How does forest soil get rich in nutrients? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) Why is it important to protect the forest cover of the Earth? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 12
Lesson 10 Space Travel Remembering Multiple Choice Questions 1) What vehicle is used to travel in space? [ ] (A) aircraft (B) jet (C) spacecraft (D) telescope 2) What is the layer of air around the Earth called? [ ] (A) open space (B) atmosphere (C) heavenly bodies (D) gravity Fill in the Blanks 3) We need high-speed _________________________ to send spacecrafts out of the Earth’s pull of gravity. 4) We cannot use aircrafts to fly into space due to the Earth’s ______________________. Very Short Answer Questions 5) What does a spacecraft carry with it? Ans. ____________________________________________________________________________________ 6) What is space? Ans. ____________________________________________________________________________________ Short Answer Question 7) What can cause a spacecraft to heat up and catch fire? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 13
Understanding True or False 8) In space, the sunlight is very sharp. [ ] 9) Space has no air to breathe. [ ] 10) ISS orbits the Moon. [ ] 11) Spacesuits cannot protect us from harmful sunlight. [ ] Short Answer Questions 12) Why do astronauts wear spacesuits? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 13) Which is the largest space station and around what does it orbit? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 14) Look at the picture given below and answer the following questions. 14
________________________________________________________ a) What is shown in the picture? ________________________________________________________ b) Where is it located? ________________________________________________________ ________________________________________________________ c) What is unique about it? ________________________________________________________ ________________________________________________________ d) Who stays there? ________________________________________________________ ________________________________________________________ Application Multiple Choice Questions 15) Which of the following things will you get as food when you are at the ISS? [ ] (A) pizzas (B) frozen vegetables and desserts (C) burgers (D) salt in solid form 16) Suppose you are at the ISS. Which of the following things should you not do? [ ] (A) skipping meals and daily exercising (B) spacewalk (C) carrying out experiments (D) research in space Short Answer Questions 17) Why is exercising important for astronauts? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Space Travel 15
18) What type of food items are included in the ISS menu? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 19) How do astronauts sleep in space? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) If you want to be an astronaut, what things do you need to do? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 16
Lesson 11 Wildfire Remembering Multiple Choice Questions 1) Which of the following is a natural disaster? [ ] (A) breeze (B) rain (C) shedding of leaves (D) wildfire 2) How many wildfires occur in India every year? [ ] (A) around 30,000 (B) around 20,000 (C) around 40,000 (D) around 50,000 Fill in the Blanks 3) Natural disasters are the disasters caused by ________________________. 4) _____________________ winds blow off everything in their way. Very Short Answer Questions 5) What is lava? Ans. ____________________________________________________________________________________ 6) State any one place where wildfires can break out. Ans. ____________________________________________________________________________________ Short Answer Question 7) What type of damage is caused by natural disasters? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 17
Understanding True or False 8) Oxygen is necessary for a wildfire to occur. [ ] 9) Firefighters are responsible for spreading wildfires. [ ] 10) Dry leaves may catch fire due to the Sun’s heat. [ ] 11) Human beings are always responsible for wildfires. [ ] Short Answer Questions 12) State any two causes of wildfires. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 13) State any two careless human activities that may cause a wildfire. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 14) Write a note on the ‘fire triangle’ with the help of a diagram. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 18
Application Multiple Choice Questions 15) How can wildfires cause air pollution? [ ] (A) due to the oxygen produced (B) due to the smoke produced (C) due to the residue of leaves (D) due to the Sun’s heat 16) Name the gas that is spread through helicopters to put out wildfires.[ ] (A) carbon dioxide (B) oxygen (C) smoke (D) water Short Answer Questions 17) State any two ways of controlling wildfires. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 18) What should a person do if a wildfire breaks out near his or her house? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 19) Write the effects of wildfires using the images as hints. a) ________________________________________________________________ ________________________________________________________________ b) ________________________________________________________________ ________________________________________________________________ Wildfire 19
c) ________________________________________________________________ ________________________________________________________________ d) ________________________________________________________________ ________________________________________________________________ Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) Ali and his friends plan to camp in the nearby forest. Fill out the table to help them have a campfire without causing a wildfire. Situations Precautions a) w hile choosing a spot to ________________________________________________________ have the campfire ________________________________________________________ b) while lighting the campfire ________________________________________________________ ________________________________________________________ c) while the campfire burns ________________________________________________________ ________________________________________________________ d) before leaving for home ________________________________________________________ ________________________________________________________ 20
Lesson 12 Cyclones and Floods Remembering Multiple Choice Questions [ ] 1) What do we call the storms which bring heavy rains along with them? [ ] (A) earthquakes (B) floods (C) wildfires (D) cyclones 2) What do we call the centre of a cyclone? (A) eye (B) wing (C) hole (D) spin Fill in the Blanks 3) ______________________ are formed over the oceans. 4) Around the ______________ of a cyclone, winds spin at high speeds. Very Short Answer Questions 5) What does a cyclone bring with it? Ans. ____________________________________________________________________________________ 6) Where does a cyclone move towards? Ans. ____________________________________________________________________________________ 21
Short Answer Question 7) Describe cyclones. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Understanding True or False 8) When a cyclone hits land areas, the powerful winds may destroy everything in their way. [ ] 9) Land areas may get submerged during floods. [ ] 10) Cyclones never push the seawater onto the land. [ ] 11) Houses and vehicles are not damaged during cyclones. [ ] Short Answer Questions 12) What is flood? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 13) List any two destructions caused by cyclones. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 14) What leads to floods during cyclones? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 22
____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Application Multiple Choice Questions 15) A family lost their house in a flood. Where will they find temporary shelter? [ ] (A) police station (B) rescue camp (C) hospital (D) post office 16) Flood water makes: [ ] (A) all water sources clean and hygienic (B) potable drinking water available throughout the year (C) all water sources unfit for drinking (D) the life of the trapped people easy Short Answer Questions 17) Aman wants to know how people are rescued during floods. Can you think of any two ways? Write them down. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 18) Why do the people affected by cyclones or floods need medical support? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Cyclones and Floods 23
Long Answer Question 19) Fill in the missing information in the concept map to show how the government helps people affected by cyclones. Government help a) ______________ water temporary c) ______________ medicines b) ______________ shelters ______________ d) ______________ milk Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) The government has given a cyclone alert. People are asked to prepare an emergency kit. List the items that should be a part of the emergency kit. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 24
Lesson 13 Earthquakes and Tsunami Remembering Multiple Choice Questions 1) What do we call the shaking of the Earth? [ ] (A) wildfire (B) cyclone (C) earthquake (D) flood 2) What is the sign of an earthquake? [ ] (A) heavy rains (B) strong winds with rain (C) shaking of the ground (D) wildfire Fill in the Blanks 3) M ost earthquakes in the world happen along the edges of the _______________________. 4) _ ________________________ is used to measure the strength of earthquakes. Very Short Answer Questions 5) Are all earthquakes of the same strength? Ans. ____________________________________________________________________________________ 6) W hat is shown in the given picture? Ans. ____________________________________________________________________________________ Short Answer Question 7) What is the ‘Pacific ring of fire’? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 25
Understanding True or False 8) Inner layers of the Earth collide or move apart during an earthquake. [ ] 9) Tsunami means ‘harbour wave’ in Japanese. [ ] 10) Tsunami is the result of a wildfire. [ ] 11) No damage is caused to public property due to earthquakes. [ ] Short Answer Questions 12) What is a tsunami? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 13) Why do the tsunami waves rise like huge walls of water when they reach the coast? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 14) Complete the sequence of events to explore how earthquakes happen. a) The Earth has ________________________________________________________________________. b) The upper layers are _________________________________________________________________. c) They float over _______________________________________________________________________. d) While floating ________________________________________________________________________. This causes an earthquake. 26
Application Multiple Choice Questions 15) In which of the following years did the deadliest earthquake happen in the Indian Ocean? [ ] (A) 2010 (B) 2014 (C) 2002 (D) 2004 16) Rebuilding work by the government is necessary after earthquakes or tsunami so that: [ ] (A) people can go back to their normal life (B) people can remember about the event (C) people can always be put in danger (D) people should not go back to their normal life Short Answer Questions 17) What destruction do the tsunami waves cause? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 18) What damage does an earthquake cause? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 19) What type of help is offered by the government and some agencies to the people who are affected by earthquakes or tsunami? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Earthquakes and Tsunami 27
____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) In the given situations, write the Do’s and Don’ts to follow during an earthquake. Situations Do’s Don’ts a) You are on the school ___________________________ ___________________________ playground. ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ ___________________________ b) Y ou are at home. Your ___________________________ ___________________________ house is on the fifth ___________________________ ___________________________ ___________________________ floor. ___________________________ ___________________________ ___________________________ 28
Lesson 14 Simple Machines Remembering Multiple Choice Questions 1) Identify a simple machine from the following. [ ] (A) mixer used at home (B) grinder to grind grains (C) wheel and rope used to draw water (D) iron used to press clothes 2) Which of the following is not a simple machine? [ ] (A) wedge (B) lever (C) pulley (D) washing machine Fill in the Blanks 3) Simple machines are the devices that make the work ________________. (difficult/easy) 4) A _________________ surface is used to load or unload heavy objects. (sloping/flat) Very Short Answer Questions 5) Give any one example of simple machines. Ans. ____________________________________________________________________________________ 6) Why do we use simple machines? Ans. ____________________________________________________________________________________ Short Answer Question 7) How do simple machines help us? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 29
Understanding Match the Following 8) a) inclined plane 9) 10) b) wedge c) lever 11) d) wheel and axle Short Answer Questions 12) What is a screw? How is a screw useful? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ 13) Why do we use pulleys to lift objects? Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Long Answer Question 14) Write a note on ‘lever’ with the help of a diagram. Ans. ____________________________________________________________________________________ 30
____________________________________________________________________________________ ____________________________________________________________________________________ Application Multiple Choice Questions 15) Which type of simple machine is shown in the given picture? [ ] (A) pulley (B) wheel and axle (C) inclined plane (D) wedge 16) Which of the following is an example of a lever?[ ] (A) steering wheel (B) knife (C) stapler (D) bottle cap Short Answer Questions 17) List any two wedges that we use in our day-to-day life. Also, mention where they are used. Ans. ____________________________________________________________________________________ ____________________________________________________________________________________ ____________________________________________________________________________________ Simple Machines 31
18) Identify and underline the simple machines from the following sentences. a) Rajat opened a soft drink bottle with a bottle opener. b) We use a staircase to climb. Long Answer Question 19) Draw and name any three devices from our kitchen that are simple machines. Ans. Higher Order Thinking Skills (H.O.T.S.) Long Answer Question 20) Name the simple machines you can use in the following situations. Jobs Simple Machines a) to make a trolley to carry ________________________________________________ your school bag b) to carry your bicycle up ________________________________________________ the stairs c) to join a broken arm of a ________________________________________________ chair d) to cut some fruits to make ________________________________________________ a fruit salad 32
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