Unit 6 Exam

Explain why a solid expands when it is heated.

Use Particle theory to explain why liquids and gases flow.

What is particle theory?

Melting is...

• solid to liquid

• liquid to gas

• solid to gas

• liquid to solid

Freezing is...

• solid to liquid

• liquid to gas

• gas to liquid

• liquid to sold

boiling is...

• solid to liquid

• liquid to gas

• gas to liquid

• liquid to solid

Condensing is...

• solid to liquid

• liquid to gas

• gas to liquid

• liquid to solid

Draw a picture of particles in solids

Draw a picture of particles in liquids

Draw a picture of particles in gases