| A | B |
|---|
| acid rain | precipitation with below-normal pH, often the result of industrial pollution & automobile exhaust |
| biology | science of life |
| cancer | disease characterized by abnormal cell growth |
| cell | smallest unit that can perform all the life processes |
| control | factor that is held constant throughout an experiment to test a hypothesis |
| cystic fibrosis | genetic disorder in which excessive amounts or mucus are secreted, blocking intestinal and bronchial ducts & causing difficulty in breathing |
| experiment | test of a hypothesis in which data are gathered under controlled conditions |
| heredity | transmission of genetic traits from parent to offspring |
| HIV | human immunodeficiency virus that causes AIDS |
| homeostasis | maintenance of the internal stability of a cell, organism, or population in its environment |
| hypothesis | proposed explanation; educated guess |
| metabolism | sum of all chemical processes occurring in an organism |
| multicellular | organism that consists of more than one cell |
| observation | information that is known from being seen or experienced directly |
| pH | number that indicates the acidity of a solution, representing the hydrogen ion concentration |
| prediction | expected outcome if a hypothesis is accurate |
| theory | explanation based on a hypothesis that has been tested many times |
