1
A spring stores ______ energy when it is stretched or squashed.
2
Electromagnetic waves are split into seven groups according to their ________.
3
The two most familiar groups in electromagnetic waves are light and ______ waves.
4
Scientists and engineers have made much smaller versions of the solar furnace which is the _____.
5
The form of energy that can travel through space at the speed of light.
6
When light falls on a smooth surface like a mirror, the light gets _______.
7
When light falls on a curve surface such as a lens, it brings all the infra-red radiation to _________, which becomes extremely hot.
8
Energy produced due to the vibration of an object.
9
A certain amount of energy possessed by all substances, which allows them to move.
10
Substance that allows the movement of electric charges through it.
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