Effect of Heating

Targets...Today we will be:

• Developing our knowledge and understanding of solids, liquids and gases– I can describe the differences between solid, liquids and

gases

• Developing our knowledge and understanding of particle arrangements– I can describe how particles are arranged in solids,

liquids and gases– I can explain the effect of heat on solids

Solids, Liquids and Gases• _____________ have a fixed shape. • ___________ and ___________ can change their shape.

• _____________ and __________ have a fixed volume. • ___________ can change their volume – they spread out to

fill the container.

• _____________ cannot flow. • ___________ and ____________ can flow. • Substances that can flow are called _____________.

SolidsLiquids Gases

Solids LiquidsGases

GasesLiquidsSolids

Fluids

Particle ArrangmentsHow are the particles arranged:

In a solid?

In a liquid?

In a gas?

Heating SolidsWhat happens to the particles in a

solid when they are heated?

Safety?

Heating Solids1. Collect equipment in pairs:

Bunsen, heat proof mat, goggles, matching bar and gauge, ball and hoop, timer

2. Once EVERYONE is set-up the lighter will be passed around

3. Remain at your station for the rest of the practical

4. Check the bar fits in the gauge then heat it for 4 minutes in the BLUE Bunsen flame.

5. Recheck the size of the bar. Record your results on the laminate.

6. Rest the HOT metal on the heat proof mat. DO NOT touch it.

Heating SolidsWhat happens to the particles in a

solid when they are heated?

The particles stay the same size... ... they just vibrate more and need more space

Do all metals expand the same?Bimetallic Strip:• Heat the bimetallic strip in the BLUE bunsen flame.

• What do you observe? Record results on the laminate.

Why do bridges have gaps?

The particles stay the same size... ... they just vibrate more and need more space

Heating Solids

Heating Liquids

Heating Gases

Class Challenge

Start

When metals are heated they…

Liquids and gases can flow so they are called…

…expand

Heating Interactive

http://www.bbc.co.uk/schools/ks3bitesize/science/chemical_material_behaviour/behaviour_of_matter/activity.shtml