| A | B |
| Control | standard that is compared to the outcome of an experiment |
| Variable | the part of an experiment that can change |
| Hypothesis | educated guess |
| Theory | scientific knowledge that is based on the results of many tests and observations |
| Law | how things work in nature and are true all the time |
| Organism | any living thing |
| Cell | the smallest unit of an organismthat carries on the fuction of life |
| Homeostasis | keeping internal conditions correct regardless of outside conditions |
| Spontaneous Generation | the idea that living things come from nonliving things |
| Biogensis | theory that only living things come from living things |
| Kingdom | first and largest catagory of classification |
| Phylogeny | evolutionary history of an organism |
| Binomial Nomenclature | two word naming system developed by Linnaeus |
| Genus | a group of similar species |
| Dichotomous Key | a detailed list of characteristics that are arranged in steps by two choices per step |