1. Warm Up 4/4/16 NO DEVICES TODAY, PLEASE PUT THEM AWAY Part 1: In your journal, please define the following in your own words: parasitism, commensalism, and mutualism (5 minutes) Part 2: The picture above depicts the nitrogen cycle in an aquarium. In a short essay, please explain which of the organisms would you add more of to help remove the nitrates and discuss why. (5-7 minutes)

2. Trophic Levels Foldable What is a trophic level?

3. Trophic Levels Foldable Use a ruler to draw two lines between the corners of your paper.

4. Trophic Levels Foldable Draw three evenly spaced smaller squares inside the paper to create four levels

5. Trophic Levels Foldable What type of organisms make up our first/lowest trophic level? ProducersAutotrophs: plants, seaweed

6. What type of organisms make up our second trophic level? ProducersAutotrophs: plants, seaweed Primary Consumers Heterotrophs: herbivores

7. What type of organisms make up our third trophic level? Producers Autotrophs: plants Primary Consumers Heterotrophs: herbivores Secondary Consumers Heterotrophs: Carnivores

8. What type of organisms make up our top trophic level? Tertiary Consumers Hetertrophs: Top Carnivores & Decomposers

9. Make a cut along the dashed line.

10. Fold along the lines to create a pyramid

11. Loss of Energy at Trophic Levels https://www.youtube.com/watch?v=ScizkxMlEOM