Thursday, February 20, 2020

EVS--- Work and Energy (Practice - sheet)


Work and Energy
    Worksheet
* Fill  in  the blanks
1. We  get  energy  from  the  _______  we  eat.
2. We use______  to  do  our  work.
3. _______energy helps us to hear.
4. Energy we get from ______is  called  solar  energy.
5. Moving air is called  ______.

 *Answer the following questions:
1.What do we do when we want to move something?
2.Why does an apple fall down when it gets detached from the tree?
3.Who was the first person to discover the concept of gravitational force?
4.Why is the sun a natural source of energy?
5.How do plants prepare their own food? Name the process.
6.What happens when we apply a force to an object?
7.Give some examples of work done when an object moves from its position due to a force exerted on the object?
8.When do you feel tired? 
9.What should we do to gain strength or energy?
10.Name the other forms of energy. 
11.How do plants prepare their own food?
12.Why is the Sun the main source of energy for all living things?
13.What does the blue colour of the globe indicate?
14.How much of the Earth’s surface is covered with water?
15.List some sources of water?

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