| A | B |
|---|
| Primary Producer or Autotroph | Phytoplankton microalgae and plants that make their own food from the energy of the sun. |
| Primary Consumer | Herbivores like Zooplankton and grazers like urchins and snails that eat producers in marine environments |
| Trophic Level | The position an organism fills within a food web. |
| Decomposers | Mainly bacteria in the ocean that break down all the dead organisms |
| 10% | The amount of energy that is transferred to each trophic level. |
| 90% | The amount of energy which gets lost as heat during energy transfer |
| Arrow (-->) in a food web or food chain | Shows the flow of energy from one organism to another |
| Apex predator | Top predator like a Sea Lion or a Killer Whale |
| heterotrophs | Organisms that cannot make their own food. They must go out and "eat" to receive nutrition |
