Light, sound, action Particle model

There are ____ main states of matter

• 1

• 2

• 3

• 4

True or false: Particles move in solids, liquids and gases

• True

• False

The particles are furthest apart in a ....

• solid

• liquid

• gas

When a solute (e.g. salt) dissolves in a solvent (e.g. water) it is said to be ...

• dissolvable

• insoluble

• soluble

Solids become liquids when ...

• heat is removed

• heat is applied

• they are involved in a chemical reaction

An object with particles packed closely together is said to be

• incompressible

• hot

• low density

• high density

Name the phase change (change of state) when a liquid turns into a gas

• sublimation

• evaporation

• condensation

• solidifcation

When a solid undergoes liquidification it becomes a

• more pliable solid

• liquid

• gas

The state with the most energy is

• solid

• liquid

• gas

When heat is applied to an object the particles inside it move away from each other. This is called ...

• expansion

• contraction