Question

1. determine which organisms in your food chain are the following: producer, primary consumer, secondary consumer, etc. write this terms under each organism above. 33. assign each organism in your food chain above to each of the trophic levels below: first trophic level, second trophic level, third trophic level, fourth trophic level 34. describe the 10% law 35. in the energy pyramid at right, write the name of the organisms from your food chain in each trophic level as well as the number of calories available. 36. in order to make your food chain a food web, what would you need to add to it?

Explanation:

1. Producers are plants which make their own food via photosynthesis. Primary consumers eat producers, and secondary consumers eat primary consumers.
2. First trophic level: Producers (e.g., grass). Second trophic level: Primary consumers (e.g., rabbit). Third trophic level: Secondary consumers (e.g., fox). Fourth trophic level: Tertiary consumers (e.g., hawk).
3. The 10% law states that only about 10% of the energy at one trophic - level is passed on to the next trophic level. For example, if producers have 10,000 kcal of energy, primary consumers will get about 1000 kcal.
4. Starting from the bottom of the energy pyramid (10,000 kcal for producers), for the first trophic level (producers) it's 10,000 kcal, second trophic level (primary consumers) it's 1000 kcal, third trophic level (secondary consumers) it's 100 kcal, and fourth trophic level (tertiary consumers) it's 10 kcal.
5. To make a food chain a food web, you need to add more interconnected food chains showing the multiple feeding relationships among organisms.

Answer:

1. Producers are plants; primary consumers eat producers; secondary consumers eat primary consumers.
2. First trophic level: Producers. Second trophic level: Primary consumers. Third trophic level: Secondary consumers. Fourth trophic level: Tertiary consumers.
3. The 10% law means only about 10% of energy is transferred to the next trophic level.
4. First trophic level: 10,000 kcal. Second trophic level: 1000 kcal. Third trophic level: 100 kcal. Fourth trophic level: 10 kcal.
5. Add more interconnected food chains.