Changes of states

Question 1

what is melting?

Answer 1

when a solid is heated, its particles get more energy and vibrate more, this makes the solid expand.

Question 2

what is boiling?

Answer 2

when a liquid is heated, its particle get more energy and move faster.This makes the liquid expand.

Question 3

what is evaporating?

Answer 3

Some particles in a liquid have more energy that other.even below the boiling point , some particles have enough energy to escape and form a gas. This is called evaporation.

Question 4

what happens at melting point ?

Answer 4

At the melting point, the particle vibrate and they weaken from their position. The solid turns liquid.

Question 5

what happens at boiling point ?

Answer 5

At boiling point, the particles get enough energy to break from their forces and break away to form a gas

Question 6

mention the changes of the states of the following :
solid to a liquid to a gas

Answer 6

solid to a liquid: melting
liquid to a gas: boiling

Question 7

mention the changes of the states of the following :
gas to a liquid to a soild

Answer 7

gas to a liquid: condensation
liquid to a solid: freezing

Question 8

what is condensation?

Answer 8

the process by which water vapour in the air is changed into liquid water