| A | B |
| plankton, nekton, benthos | The three main groups of life |
| nekton | Organisms that swim |
| benthos | Organisms or plants that live on the ocean floor |
| plankton | Animals that float on the surface of the ocean |
| Nertic, Intertidal, Open Sea | The three main ocean life groups |
| Open Sea | Largest ocean life group |
| Intertidal Zone | The smallest life group |
| Photosyenthic, Bathyal, Abyssal | The 3 divisions of the Open Sea Zone |
| Photosyenthic | Out of the Open Sea Zone, what is the closest division to the suface |
| Abyssal | The farthest division to the surface out of the Open Sea Zone |