Terms : Hide Images
| 7221848193 | Matter | anything that takes up space and has mass |  | 0 |
| 7221850224 | Chemical Reactions | Process that changes one set of chemicals into another set of chemicals |  | 1 |
| 7221853066 | Element | A pure substance made of only one kind of atom |  | 2 |
| 7221854104 | Chemistry | The study of the properties of matter and how matter changes |  | 3 |
| 7221854911 | Atoms | Building blocks of matter |  | 4 |
| 7221855647 | Protons | Positively charged particles |  | 5 |
| 7221856237 | Neutrons | neutral particles that do not have an electrical charge |  | 6 |
| 7221857096 | Electrons | Negatively charged particles |  | 7 |
| 7221858278 | Atomic Number | The number of protons in the nucleus of an atom |  | 8 |
| 7221859134 | Atomic Mass | Number of protons and neutrons |  | 9 |
| 7225793073 | Compounds | 2 or more elements chemically combined |  | 10 |
| 7225814027 | Radiation | Energy that is released or created when a nucleus breaks apart. |  | 11 |
| 7225829283 | Pure Substance | A material that is composed of only one type of particle |  | 12 |
| 7225831193 | Molecule | A group of atoms bonded together |  | 13 |
| 7238340133 | The Law of Conservation of Mass | In a chemical reaction, matter is not created or destroyed, but is conserved |  | 14 |
| 7238345903 | Balanced Equations | equal amount of elements on each side of equation |  | 15 |
| 7238348354 | Exothermic | releases energy |  | 16 |
| 7238349748 | Endothermic | Absorbs heat |  | 17 |
| 7243576936 | Activation Energy | Energy needed to get a reaction started |  | 18 |
| 7243581688 | Enzyme | A type of protein that speeds up a chemical reaction in a living thing |  | 19 |
| 7243581689 | Catalyst | substance that speeds up the rate of a chemical reaction |  | 20 |
| 7243581690 | Substrate | reactant of an enzyme-catalyzed reaction |  | 21 |
