| Term | Definition |
|---|---|
| atom | a small particle that is a building block of matter |
| compound | a substance made of two or more elements that are joined in a specific combination |
| element | a substance made of only one kind of atom |
| heterogeneous | a mixture in witch the substances are not evenly mixed |
| homogeneous | a mixture in witch two or more substances are evenly mixed but not bonded together |
| matter | anything that has mass and takes up space |
| mixture | matter that can vary in composition |
| molecule | two ore more atoms that are held together by chemical bonds and act as a unit |
| substance | matter with a composition that is always the same |
