
Use particle theory to explain why you can compress a gas, but you cannot compress a solid or a liquid.

Important Questions on Properties of Matter and Materials
A diamond is hard and cannot be scratched easily. Use particle theory to suggest why?

Name the change of state happening in the example listed below.
A gold ring is heated until it turns into liquid gold.

Name the change of state happening in the example listed below.
Drops of water form on a bathroom mirror.

Name the change of state happening in the example listed below.
A chocolate bar is left in a warm kitchen.

Name the change of state happening in the example listed below.
A layer of ice forms on top of a lake in winter.

Three students were asked what would happen to the mass of an ice cube as it melted. Who is correct?
Aisha: The mass will go down because liquids have less mass than solids.
Zain: The mass will stay the same because no particles in the ice have been lost or gained.
Adnan: The mass will go up because the water takes up more space than the ice.

Describe what happens to the particles when a liquid is heated to form a gas.

State if the following material is flexible, brittle or malleable:
Glass jug.
