| A | B |
|---|
| theory | most logical explanation for events that happen in nature |
| law | a statement of observed experimental facts that has been tested many times and is accepted as true |
| zoology | study of animals |
| botany | study of plants |
| ecology | study of relationships and interactions of living things with one another and with their environment |
| microbiology | study of microorganisms |
| microorganism | microscopic organisms |
| scientific method | systemic approach to problem solving |
| hypothesis | suggested solution to a problem |
| variable | factor being tested in an experiment |
| control experiment | experiment done in exactly the same way as another experiment, but without the variable |
| data | recorded observations and measurements |
| metric system | universal system of measurement |
| meter | basic unit of length in the metric system |
| kilogram | basic unit of mass in the metric system |
| mass | amount of matter in an object |
| weight | measure of the pull of gravity on an object |
| newton | basic unit of weight in the metric system |
| density | measure of how much mass is contained in an object |
| Celsius | the metric unit for temperature |
| microscope | instrument that produces an enlarged image of an object |
| compound light microscope | microscope having more than one lens and that uses a beam of light to magnify objects |
| electron microscope | microscope tha uses a beam of electron to magnify objects |
| X-ray | a tool used to see dense material inside an organism |
