1. # 11)Examine the energy flow and loss through the trophic levels of an ecosystem given an illustration of an energy pyramid.

2. I. Ecological Pyramid: A representation of the amount of useful energy at each step of the food chain. A representation of the amount of useful energy at each step of the food chain. 90% is lost…which means 10% goes on to the next level. 90% is lost…which means 10% goes on to the next level. How is it lost?? The energy is used up by life processes like moving, digestion, mating, defending territories, etc. How is it lost?? The energy is used up by life processes like moving, digestion, mating, defending territories, etc.

4. II. Pyramid of Numbers: is a graphic model describing the number of organisms that exist at each trophic level in an ecosystem.

9. III. Biomass Pyramid: Represents total amount of living organic matter within each trophic level. Represents total amount of living organic matter within each trophic level. Grams of organic matter per unit area. Grams of organic matter per unit area. Amount of potential food available for each level in an ecosystem. Amount of potential food available for each level in an ecosystem.

12. Now, are you ready to make your very own Ecological Pyramid Model?