| A | B |
|---|
| dependent variable | The variable you measure in an experiment. |
| dichotomus key | A usefule tool with paired choices that help identify an organism. |
| diffusion | The movement of molecules from an area of high concentration to an area of low concentration. |
| diploid | Pairs of chromosomes. |
| direct current | When electrons flow in one direction. |
| dominant | A trait expressed with a capital letter. |
| ecology | The study of the ecosystems and the interactions within them. |
| ecosystem | All the living and non-living things in an area. |
| electric current | The movements of electrons through a conductor. |
| electric discharge | The rapid movement of charges from one place to another. |
| electron | A negatively charged particle in an atom. |
| element | A substance that contains only one type of atom. |
| elipse | An oval path. |
| EPA | An agency that passes and regulates laws to protect our environment. |
| equilibrium | When molecules of one substance are evenly spread throughout another substance. |
| estuary | An area where a river meets the ocean. |
| eukaryotic cell | A cell that contains a nucleus. |
| evaporation | When the fastest moving molecules escape and form a gas. |
| evolution | Through time organisms adapt to the conditions in their environment. |
| experimental group | The group you do apply the independent variable to. |
| F1 generation | The first set of offspring in a genetic cross. |
| F2 generation | The offspring born to the F1 generation. |
| deoxyribonucleic acid | DNA the genetic fingerprint of an organism. |
| fermentation | A form of respiration that occurs in the absence of oxygen. |
| density | Mass divided by volume. |
