Unit 6: Environmental Science Food Webs and Energy Transfer
1. Where does all the energy in the food web begin with even though its not on the diagram?
2. What would happen to the organisms in this food web if the sun was not present? Support your answer.
3. Identify three primary consumers in this diagram.
4. Idenitfy three secondary consumers in this diagram.
5. What are five organisms where the fox get its energy?
6. What percentage of the energy is passed from the predaceous insect to the toad?
7. Which organism would you expect to have the greatest biomass? Support your answer.
8. Which organism would you expect to have the lowest biomass? Support your answer.
9. Explain what you expect to happen to the squirrels if hunters wiped out the fox population.
Match cut out sheets to t-chart on paper. How fast can you finish?

1. Where do autotrophs receive their energy?
2. Identify two autotrophs in this diagram. (Hint: think about your answer to number 1.)
3. What does the vertebrate predator eat?
4. Who is going to have a higher energy content: invertebrate shredders of vertebrate predators? Explain your reasoning in a complete sentence.
5. Who is going to have higher biomass : invertebrate shredders of vertebrate predators? Explain your reasoning in a complete sentence.
6. What will happen to the number of invertebrate collectors if the vertebrate predators increased? Explain your reasoning in a complete sentence.
7. What food do the invertebrate predators and the vertebrate predators compete for?
1. Make a bar graph of the energy content of each level of the food chain . (Don’t forget to label your axes – and include units for energy!)
2. Which level of the food chain has the largest amount of energy?
3. Which level of the food chain has the lowest amount of energy?
4. In a complete sentence, describe the trend you observe in this graph.
5. Which level of the food chain would you expect to have the greatest biomass ? Explain your reasoning.