| A | B |
|---|
| algae | simple plants found in water, such as seaweed or pond scum |
| asteroid | any of the small, celestial bodies orbiting the sun mainly between Mars and Jupiter |
| cellular | having to do with or consisting of cells |
| combustion | the act of burning |
| ecological | having to do with the branch of science that studies the relationship of organisms to their environment |
| filament | a single thread or a thin wire |
| frond | a large leaf |
| geographical | having to do with the study of the earth and its life |
| hereditary | having to do with characteristics that are passed on from parent to offspring |
| hypothesis | a trial answer to a problem |
| magnetic | having the ability to attract |
| physicist | a scientist who studies the properties of matter and energy |
| ratio | the relationship in amount of size between two or more things |
| species | a classification of closely related organisms |
| stratum | a layer of rock made up of the same kind of material |
| synthesize | to combine |
| undersea | below the surface of the sea |
| unstable | not constant or steady; easily changed |
| vaccine | a preparation given to build up immunity to a particular disease |
| verify | to prove |
