Unit - 5.2 Temperature And Its Measurement — PHYSICS STD 7 — Question

Volume of a cube = _________

The heat energy from the sun reaches the earth due to the process of ___________ .

The phenomenon due to which a ray of light, travelling from one optical medium to another optical medium, bounces off from its surfaces with a change of angle is called ___________ of light.

The object on which work is done,___________ energy.

A pair of colours which on mixing produce white colour are called _________ colours.

The reverse process of evaporation is called ___________

Plants use the __________ energy from the sun to prepare their food.

The expansion produced in matter due to the absorption of heat is known as ___________ expansion.

The work done by a body is the product of force and ___________ .

The weight of a body is measured using a _____________.