| A | B |
|---|
| Acid rain | results when sulfur in smoke produced by burning of coal and oil reacts with water in the air to form sulfuric acid, which falls back to Earthin rain or snow |
| biology | the study of life |
| cancer | is a disorder of cells in which the normal controls on growth have been damaged and the cells divide unchecked within the body |
| cell | is the smallest unit capable of all life functions |
| control | factor that is held constant throughout an experiment to test a hypothesis |
| cystic fibrosis | is an often fatal genetic disorder, passed from parent to offspring that is caused by a defective gene encoding a cell membrane protein. The child's cells cannot pump chlorine ions in and out of cells correctly, causing a very thick mucusto build up in the lungs and other organs. |
| experiment | the test of a hypothesis |
| heredity | the process of passing genetic instructions from parent to offspring |
| HIV | humanimmodeficency virus that destroys a body's immune system causing AIDS |
| homeostasis | the process by which all living things maintain relatively stable internal environments |
| hypothesis | a proposed explanation to a question or problem |
| metabolism | is the sum of all chemical reactions that an organism carries out. |
| multicellular | an organism composed of many cells |
| observation | the act of noting or perceiving objects or events by using one or more of the five senses |
| pH | a number that represents the hydrogenion concentration in a solution |
| prediction | is what you expect to happen in an experiment |
| theory | a unifying explanation for a wide range of observations |
