| Term | Definition |
| Death rate | rate at which organisms die |
| Food Pyramid | A food chain which shows biomass and energy relationships |
| Birth rate | rate at which organisms reproduce |
| Food web | Shows the relationship of several food chains |
| Food chain | Shows one line of predator and prey relationships |
| What is lost as you progress in the food pyramid? | Energy and heat |
| Producer | The organism that produces its own food |
| Primary Consumer 1 | The organism that usually eats the producers |
| Primary consumer 2 | The organism that usually eats the primary consumer 1 |