| A | B |
|---|
| Matter | anything that has mass and takes up space |
| Atoms | smallest units that make up matter |
| Nucleus | the center of the atom |
| Protons | positive charge particles in the nucleus |
| Neutrons | no charge, located in the nucleus |
| Electrons | negatively charged particles located around the nucleus |
| Atomic Mass | Massive number the number of protons plus neutrons |
| Atomic Number | smaller number;the number of protons and the electrons |
| Elements | substances made of only one kind of atom. Can't be broken down into simpler form. |
| Periodic Table | important reference table of elements |
| Covalent Bond | Share outer electrons |
| Ionic Bond | attract opposite charged particles |
| Compounds | two or more elements combined to make a new substance |
| Ions | a charged atom-positive they lost an electron. Negative they gained an electron |
| Mixtures | combinations of substances that keep their own properties. Ex. Salad |
| Solutions | mixture in which one or more substances mix evenly. Ex. gatorade |
| Suspension | Mixture in which substances are spread evenly throughout but particles settle out over time. Ex. Salad dressing. |
| Carbohydrates | main source of energy |
| Lipids | Store and release energy Ex. fats, oils |
| Nucleic Acids | store important info RNA and DNA |
| enzymes | regulate nearly all chemical reactions in cells |
| inorganic compounds | made from elements other than carbon |
| organic | elements that contain carbon |
| passive transport | movement of substance through a cell membrane without the use of energy |
| active transport | movement of through a cell membrane that require energy |
| endocytosis | taking substances into a cell by surrounding it |
| exocytosis | contents are released from a cell |
| metabolism | the total of all chemical reactions in an organism |
