| A | B |
| Herbivore | Consumer that eats only plants |
| Carnivore | Consumer that eats only meat |
| Omnivore | Consumer that eats plants and meat |
| Producer | Organisms that can make their own food |
| Primary consumer | Consumer that eats producers |
| Secondary consumer | Consumer that eats the primary consumer |
| Tertiary consumer | Consumer that eats the secondary consumer |
| Limiting factor | Factors that control the carrying capacity of an ecosystem |
| Carrying Capacity | The number of organisms an ecosystem can support |
| Abiotic | Non-living parts of an ecosystem |
| Biotic | Living parts of an ecosystem |
| Population | All the same organisms in an ecosystem |
| Community | All the different organisms in an ecosystem |
| Ecosystem | The abiotic and biotic parts of an area |
| Decomposer | Breaks down dead material |
| Scavenger | Consumer that eats dead animals |