Dissolve: Matter is incorporated into the matter of the original solution

Freezing: Turning liquid to solid

Gas: A substance where molecules are very weakly together, take shape of container, and volume is same as container

Law of Conservation of Mass: A scientific idea that says mass is neither created nor destroyed in chemical reactions; despite state of matter the mass stays the same

Liquid: A substance where molecules are loosely bound together, takes shape of a container, and has a fixed volume

Mass: The measure of how much matter is in an object

Matter: The tiny pieces that something is made of

Melting: Turning solid to a liquid

Plasma: A substance where molecules are very weakly together (like a gas), but they are electrically conductive, takes the shape of the container, and volume is same as container

Solid: A substance where molecules are closely bound together, holds its shape, and has a fixed volume

Volume: The amount of space an object takes up.