1. Ability to do work is called……………….

2. Energy is measured in ……………….

3. The energy which every moving object has ……………….

4. The energy you gain when you are at a height from the ground is called ……………….

5. We get thermal energy from ……………….

6. The natural source of thermal energy is ……………….

7. The energy which is created by the vibration of particles ……………….

8. Louder the sound, the more …………… it has, hence it causes a greater …………….. in particles.

9. Sound cannot travel in ………………..

10. Sound cannot travel in a vacuum because sound always needs a ………………..