Changes of State + Melting Points

• Science
• Upper Secondary (Key Stage 4)
• GCSE

Changes of State + Melting Points

	Solid	Liquid	Gas
Arrangement
Closeness
Movement
Can it flow?
Can it be compressed?

Use the answers to fill in the table.

Ordered

Close together

Close together

Random

Random

Fast

Yes

Yes

Yes

No

No

No

Far apart

Vibrating

Slow

Explain why gases can be compressed, but solids and liquids cannot.

Explain why gases and liquids can flow, but solids cannot.

How can you change the state of a substance?

Name the change of state:

liquid to gas

1. Melting
2. Boiling
3. Freezing
4. Condensation

Name the change of state:

liquid to solid

1. Melting
2. Boiling
3. Freezing
4. Condensation

Name the change of state:

gas to liquid

1. Melting
2. Sublimation
3. Freezing
4. Condensation

Name the change of state:

solid to gas

1. Melting
2. Sublimation
3. Freezing
4. Condensation

Name the change of state:

liquid to solid

1. Melting
2. Sublimation
3. Freezing
4. Condensation

Labelled the diagram.

Solid

Liquid

Gas

Freezing

Boiling

Condensation

Melting

Labelled the diagram.

Solid

Liquid

Gas

Freezing

Boiling

Condensation

Melting

Boiling or Evaporation?

Happens at any temperature.

1. Boiling
2. Evaporation
3. Both

Boiling or Evaporation?

Bubbles appear throughout the liquid.

1. Boiling
2. Evaporation
3. Both

Boiling or Evaporation?

Occurs at a specific temperature.

1. Boiling
2. Evaporation
3. Both

Boiling or Evaporation?

Requires energy.

1. Boiling
2. Evaporation
3. Both

Boiling or Evaporation?

Happens at the surface of the liquid.

1. Boiling
2. Evaporation
3. Both

Where does each statement go?

Both

Boiling

Evaporation

Requires energy

Happens at any temperature.

Happens at specific temperature.

Bubbles throughout liquid.

Happens at the surface only.

Liquid to gas.

Watch the video for some examples before moving on to the next set of questions.

https://drive.google.com/file/d/1v4UJVa4QQbbC9EKw51kz9DKGA85MwJpG/view?usp=sharing

What state is bromine in at:
-2

°C

1. Solid
2. Liquid
3. Gas

What state is bromine in at:
-40

°C

1. Solid
2. Liquid
3. Gas

What state is bromine in at:
360

°C

1. Solid
2. Liquid
3. Gas

What state is bromine in at:
6

°C

1. Solid
2. Liquid
3. Gas

A room is 25 . What state will oxygen be?

°C

1. Solid
2. Liquid
3. Gas

A room is 25 . What state will water be?

°C

1. Solid
2. Liquid
3. Gas

A room is 25 . What state will copper be?

°C

1. Solid
2. Liquid
3. Gas

A room is 25 . What state will ethanol be?

°C

1. Solid
2. Liquid
3. Gas

Complete the worksheet on states of matter.

Draw a number lines to help you work it out if needed.