Y7 Particles

Question 1

Particle structure of Solids

Answer 1

The particles have a regular arrangement,they touch one another ,they are strongly attracted to each other which helps them stay in position.

Question 2

Particle structure of Liquids

Answer 2

Some but not all sides of the particles touch ,but they are still touching. Unlike the solids the liquid particles do not have a regular arrangement .

Question 3

Particle structure of Gases

Answer 3

These particles have lots of kinetic energy ,which causes them to move rapidly. The particles do not touch and can slide past each other. The attraction between the particles is weak and they are far apart.

Question 4

Melting

Answer 4

A solid melting into a liquid

Question 5

Evaporating

Answer 5

A liquid evaporating into a gas,but doesn’t use a heat source.

Question 6

Boiling

Answer 6

Similar to heating ,it turns from solid to liquid to gas ,but it does use a heat source.

Question 7

Condensing

Answer 7

The gas condenses into a liquid

Question 8

Freezing

Answer 8

The liquid freezes into a solid

Question 9

Complete the lists of states of matter:

Ice ,Water…

Answer 9

Steam

Question 10

Diffusion is …

Answer 10

The movement of particles from an area of high concentration to an area of low concentration-A passive process ,no energy is needed from the body -this is because they have kinetic energy.

Question 11

What will happen to particles that have a lot of kinetic energy?

Answer 11

The particles would usually not be attached to each other and would be moving around fast.