| Term | Definition |
| Food Poisoning | an illness caused by eating food caused by a bacterial infection |
| Toxins | harmful chemicals that are produced by bacteria |
| Antibioitic | a medicine designed to inhibit (slow) bacteria growth |
| Autotroph | Living things that are able to use convert light energy into sugar during photosynthesis |
| Heterotroph | Living things that need to rely on another food source for energy |
| Fission | A type of reproduction in which a bacterial cell grows larger in size and then splits into two. |
| Conjugation | A type of reproduction where two bacterial cells exchange DNA through the pilli. |
| Unicellular | A living thing with only one cell. |
| Microscopic | Objects that are too small to be seen without the assistance of a microscope. |
| Flagella | A whip-like tail that helps bacteria cells move from one place to another. |
| Pilli | Tiny hair like projections that help bacteria cells attach to one another during reproduction. The DNA can be exchanged through these connections. |
| Cocci | Round shaped bacteria that can form chains. |
| Spirilla | Spiral shaped bacteria. |
| Bacilli | Rod shaped bacteria that have a flagella to help them move. |
| Cell Wall | The stiff outer layer of the cell that gives the bacteria cell shape. |
| Colonies | Small clusters of single cells of bacteria growing closely together. |
| Chains | Single cocci bacteria attached to one another. |
| Nucleus | A structure in plant and animal cells that contains DNA. |
| DNA | genetic material in cells |
| monera | the Kingdom to which bacteria belong |