Front

What is a gas?

Back

A gas has fast-moving particles and fills the shape of its container.

Front

What type of matter always fills the shape of its container?

Back

Gas.

Front

Which object is a solid that keeps its shape when it changes containers?

Back

Gravel.

Front

What happens to particles in an object at higher temperatures?

Back

Particles in an object move faster.

Front

What is a property of matter that you cannot observe just by looking at an object?

Back

Temperature.

Front

What are the three main states of matter?

Back

Solid, liquid, gas.

Front

What is a solid?

Back

A solid has a definite shape and volume.

Front

What is a liquid?

Back

A liquid has a definite volume but no definite shape.

Front

How do gas particles behave?

Back

Gas particles move freely and quickly, spreading out to fill their container.

Front

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

Back

Melting.