Has a definite volume, but not a definite shape.

Does not have a definite shape or volume.

When the electrons in a particular gas become excited from energy. Found in stars.

A very small sample of something that has specific physical and chemical properties.

A form of energy that is transferred between objects with different temperatures.

How hot or cold something is.

The total amount of movement or energy in a substance.

Heat transferred between two substances that are touching.

The energy of motion.

When heated, atoms and molecules

An object that has more kinetic energy has

When an object "cools" it is

Energy can only be transferred from

The transformation from a solid to a liquid is

When a substance changes from a solid directly to a gas

When a substance changes from a liquid to a gas

A gas changing into a liquid

A gas changing directly into a solid