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Anything that has mass and takes up space:

Anything that takes up space.  (Measurement):

The force of gravity between earth and an object:

A measure of how tightly packed something is:

A measurement of the amount of matter in an object:

Anything that allows energy to flow through:

Anything that does not allow energy to flow through:

A pure substance that cannot be broken down into any simpler substance:

A substance made up of two or more elements that are chemically combined:

The smallest unit of an element that retains the properties of that element:

The particular temperature for each substance at which it changes state from a liquid to a gas:

The temperature at which a substance changes state from a liquid to a solid:

The particular temperature for each substance at which it changes state from a solid to a liquid:

A particle that contains more than one atom joined together: