Available Answers

1. 1.

   Tick (√) on the right answer:

   1. When you move a table:
   2. In a battery cell the energy comes from:
   3. It is not a source of renewable energy:
   4. It is a non-renewable energy:
   5. Non-polluting source of energy:
2. 2.

   Fill in the blanks:

   1. ______________ energy gives us heat os well as light.
   2. Animal waste is a ______________ source of energy.
   3. Energy from falling water is used to make ______________.
   4. In a battery ______________ energy changes into ______________ energy
   5. A fan moves when ______________ energy changes into ______________ energy.
   6. We need ______________ to do work.
3. 3.

   Write the word:

   1. Energy obtained by burning coal: ____________________.
   2. Non-renewable source of energy: ____________________.
   3. A thing that works with solar energy: ____________________.
   4. The main source of energy on the earth: ____________________.
4. 4.

   Write 'True' or 'False' for the following statements:

   1. Sun is the main source of energy on the earth.
   2. Coal is a source of renewable energy.
   3. One form of energy can be changed into another form of energy.
   4. If a heavy table is pushed but it does not move, no work is done.
   5. Sound energy is created by vibrations.
5. 5.

   When is work done?
6. 6.

   Write at least five forms of energy.