What is particle motion?

• The way tiny pieces of matter move around

• The smallest part of matter

• A solid turning into a liquid

• The energy that makes things warm

What is an atom?

• The energy that makes things warm

• The smallest part of something that makes up everything

• A quick back-and-forth movement

• A type of matter made of only one kind of atom

What does vibration mean in terms of particle motion?

• When something gets bigger or spreads out

• A quick back-and-forth movement of particles

• A measure of how hot or cold something is

• A change from one state of matter to another

What happens during expansion?

• When something gets smaller

• When a gas turns into a liquid

• When something gets bigger or spreads out

• When a solid turns into a liquid

What happens during contraction?

• When a liquid turns into a solid

• When something gets smaller or shrinks

• When a liquid turns into a gas

• When something gets bigger or spreads out

What is thermal energy?

What is heat in relation to thermal energy?

• The smallest part of something

• The warmth that comes from thermal energy

• A change from one state of matter to another

• A measure of how hot or cold something is

How do we measure how hot or cold something is?

• By its color

• By its mass

• By its temperature

• By its volume

What is a phase change?

• When something changes from one state of matter to another

• When a solid turns into a liquid

• A quick back-and-forth movement of particles

• When something gets bigger or spreads out

What happens when something melts?

• A gas turns into a liquid

• A liquid turns into a gas

• A solid turns into a liquid

• A liquid turns into a solid