Question

What kind of energy transformations take place when:

1. A candle is lit,
2. The engine of a car is started and it starts climbing up a hill road,
3. The food is digested in our body,
4. An electric bulb is switched on,
5. Food is cooked.

Answer 1

Energy:

1. Ability to do work is known as energy.
2. There are many forms of energy like light energy, chemical energy, heat energy, etc.
3. Energy is always conserved, it neither be created nor be destroyed.
4. Energy is converted from one form to another.
5. Ex: In the sun nuclear energy is converted into light and heat energy.

Energy transformations take place when :

1. A candle is lit - Chemical energy into light and heat energy.
2. The engine of a car is started and it starts climbing up a hill road - Chemical energy into potential energy.
3. The food is digested in our body - Chemical energy into another form of chemical energy and heat energy.
4. An electric bulb is switched on - Electrical Energy into light and heat energy
5. Food is cooked - Heat energy into chemical energy.