particles that are tightly compacted

particles that are not tightly compacted

a substance that flows freely but is of constant volume

a substance or matter in a state in which it will expand freely

firm and stable in shape

a substance or matter in a state in which it will expand freely to fill the whole of a container

the basic unit of a chemical element

an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.

the molecules are moving in place.

the molecules are moving around each other.

the molecules are moving away from each other.

the molecules are not moving

True

False

True

False

The molecules get closer together

The molecules start moving faster.

The molecules stop moving.

The molecules become smaller.