| Term | Definition |
| Density | The amount of matter in a given space;the mass per unit volume. |
| Data | information gathered from observations |
| Disperse | To scatter, spread far and wide |
| Displace | to replce or take the place of |
| Element | is a form matter that contains only kind of atom. |
| Efficient | being effective without wasting time or effort or expense |
| Exchange | change over, change around, or switch over |
| Elevated | raised above the ground |
| Flagella | whip-like structure used for motility |
| Genetically | passing down traits for breeding system |
| Histogram | a bar chart representing a frequency distribution |
| Hypothesis | an educated guess |
| Incubate | to hatch; to warm the eggs with the body to promote hatching |
| Irrelevant | not applicable; unrelated |
| Force | is a push or pull that transfers energy to an object |
| Fossils | the perserved trace, imprint, or remains of a plant or animal |
| Hetero- | various, unlike |
| Homo- | same, alike |
| Exerted | to put forth |
| Inoculate | to vaccinate |