| A | B |
|---|
| Carbohydrates | a group of chemicals that include sugars, starches, and cellulose. |
| Lipids | a group of chemicals that include fats. oils, waxes, phospholipids, and steroids. |
| Proteins | large Complex molecules composed of many smaller molecules called amino acids. |
| Nucleic Acids | Are large, complex molecules that contain hereditary, or genetic, information. |
| Element | A substance that cannot be broken down by chemical processes into simpler substances. |
| Coumpound | A substance made of two or more elements chemically combined in definate proportions |
| Oganic Compounds | A compound that contains carbon; usually associated with living things |
| Ion | An atom that has lost or gained an electron |
| Isotopes | Atoms of the same element that have different numbers of neutrons |
| Chemical Bonds | Are attractions that hold two or more atoms togther to form a compound |
| Ionic bonds | the chemical bond formed from the attractive force between ions with opposite charges. |
| Covalent Bonds | Type of bond where ions are not gained or lost but shared |
| Polar Molecules | Molecules with a slightly negative and positive end |
| Hydrogen Bond | Hold together molecules that contain hydrogen, such as water molecules; exist in protein and nucleic acids |
| Chemical Reaction | One or more substances is changes into a new sustance by breaking and forming of chemical bonds. |
| Enzyme | a protein catalyst that speeds up the chemical reactions with an organism |
| metabolism | The combintaion of all chemical changes that takes place in an organism |
| Homeostasis | The tendency of an organism to maintain stable internal conditions |
| Solution | a uniform mixture of two or more substances |
| Solute | The dissolved substance in a solution |
| Solvent | The dissolving substance |
| Base | A compund that produces hydroxide ions when it dissolves in water |
| pH Scale | standard measurement of the concentration of hydorgen ions present in a solution;Ranges from 0-14 |
