Trophic Levels and Energy Loss

Open Ended

Why is understanding energy flow through trophic levels important for maintaining ecosystem balance?

Multiple Choice

According to the 10% rule shown in the energy pyramid, what happens to the majority of energy as it moves up each trophic level?

• It is lost as heat energy

• It is stored in the top consumer

• It is recycled by decomposers

• It is used for photosynthesis

Multiple Select

Which of the following statements about energy pyramids and the flow of energy are correct?

• Only 10% of energy is passed to the next trophic level

• Decomposers recycle nutrients back to producers

• All energy is transferred efficiently to the top of the pyramid

• Most energy is lost as heat at each level

Fill in the Blank

According to the 10% rule, if producers receive 300,000 joules of energy from the sun, the tertiary consumer will receive ___ joules.

Multiple Choice

Which law of thermodynamics explains why energy is lost as heat at each trophic level in an ecosystem?

• Second Law of Thermodynamics

• First Law of Thermodynamics

• Law of Conservation of Mass

• Law of 10%

Multiple Choice

How much of the energy in each level of a ecological pyramid gets lost as heat or used by the organism so that it cannot be passed on to the next trophic level?

• 80%
• 90%
• 10%
• 20%

Multiple Choice

The producers in this energy pyramid got 56, 784 joules of energy from the sun. How much energy do the secondary consumers receive?

• 5, 678.40 joules

• 567.84 joules

• 56.784 joules

• 51, 105 joules

Energy in Ecosystems Activity

Click on the link in the chat to fill out a Google forms survey asking about your understanding of this assignment.

Due 09/12 by 11:59 p.m.