How easily something can be scratched.

The measurement of heat energy in molecules.

The molecules are move around and are farther apart from each other. It fills the the space that it is in.

How something smells.

Molecules that are more spread out and that can move past each other.  Can change shape, but still has a definite volume.

The light reflected back to us is what we see.

Molecules are packed tightly together. Has a definite shape and volume.

How a surface feels.

Matter can also be _______________________, or put into groups or categories based on its properties.

Characteristics that can be observed and measured.

Anything that as mass and takes up space.