HT.2.a State change (AI from PPTX test)

Front

What do some changes in states of matter require or release?

Back

Energy

Front

Which term refers to the increase in size of a material when it is heated?

Back

Thermal expansion

Front

What is the process called when a liquid turns into a solid?

Back

Solidification

Front

Transition from solid to liquid

Back

Fusion

Front

What is the process of a gas turning into a liquid called?

Back

Condensation

Front

What is the term for the direct transition from solid to gas?

Back

Sublimation

Front

Why do sidewalks have cracks?

Back

To allow for thermal expansion and contraction

Front

What happens to gases when the temperature changes?

Back

They expand or contract much more than solids.

Front

What does warming a sample of helium from 0°C to 100°C do to its volume?

Back

Increases its volume by about one third.

Front

According to the particle model, what happens to the particles in gases when they are warmed?

Back

They move faster and spread farther apart.