| A | B | 
|---|
| density | a substance's mass per unit of volume | 
| compound | A substance made of 2 or more different atoms. | 
| mixture | When substances are not chemically combined, but are found together. | 
| solution | When substances are not chemically combined, but thoroughly mixed together. like salt water | 
| physical property | a characteristic of a pure substance that can be observed without changing it into another substance. like color | 
| matter | anything that has mass and volume | 
| molecule | diatomic oxygen (O2) is an example of a ____. | 
| physical change | ice melting is a | 
| physical property | The magnetism of a metal like iron is a | 
| solute | a solid that can dissolve in a liquid | 
| solvent | a liquid that dissolves stuff | 
| chemical bond | holds atoms in a molecule together |