Chapter 2 Matter

3. A substance made of atoms of two or more different elements that are chemically combined.
7. The ability off a substance to react in the presence of oxygen and burn when exposed to a flame.
8. The temperature at which a liquid becomes a gas.
9. A change that occurs when a substance changes composition by forming one or more new substances.
10. The ability of a substance to combine chemically with another substance.
13. The scientific study of the composition, structure, and properties of matter and the changes that matter undergoes.
15. A substance that cannot be separated or broken down into simpler substances by chemical means.
16. Anything that has mass and takes up space.

1. A sample of matter, either a single element or a single compound that has definite chemical and physical properties.
2. A change of matter from one form to another without a change in chemical properties.
4. The smallest unit of a substance that keeps all of the physical and chemical properties of that substance.
5. The temperature and pressure at which a solid becomes a liquid.
6. A combination of chemical symbols and numbers to represent a substance.
11. The ratio of the mass of a substance to the volume of a substance.
12. A combination of two or more substances that are not chemically combined.
14. The smallest unit of an element that maintains the properties of that element.