Phase Changes' Review

Front

How do gas molecules move?

Back

Gas molecules move away from each other.

Front

What happens when you take energy out of a substance?

Back

The molecules move slower, leading to phase changes from Gas -> Liquid -> Solid.

Front

What happens to temperature and speed of molecules when kinetic energy decreases?

Back

Both temperature and speed of the molecules decrease.

Front

What happens to temperature and speed of molecules when kinetic energy increases?

Back

Both temperature and speed of the molecules increase.

Front

What is the energy that an object has because it is moving?

Back

Kinetic energy.

Front

What is a phase change?

Back

A phase change is the transformation of a substance from one state of matter to another, such as solid, liquid, or gas.

Front

What is the state of matter with a definite shape and volume?

Back

Solid.

Front

What is the state of matter that has a definite volume but takes the shape of its container?

Back

Liquid.

Front

What is the state of matter that has no definite shape or volume?

Back

Gas.

Front

What happens to the molecules in a solid when heat is added?

Back

The molecules vibrate faster and may eventually change to a liquid.