| A | B |
|---|
| carnivore | a consumer that only eats animals |
| omnivore | a consumer that eats both producers and consumers (both plants and animals) |
| decomposer | an organism that obtains energy by consuming dead organisms and waste products of living organisms |
| energy pyramid | a model that shows how energy is used in a food chain or an ecosystem |
| respiration | energy producing process in which a cell combines oxygen with sugars and gives off carbon dioxide and water |
| competition | a situation in which 2 or more organisms attempt to use the same resource |
| herbivore | a consumer that eats only plants and other producers |
| pollution | anything produced that hurts the environment |
