Energy Pyramids Slides

Multiple Choice

Which type of consumer eats both plants and animals?

• Omnivores

• Herbivores

• Carnivores

• Scavengers

Multiple Choice

Which nutrient do decomposers return to the soil that is essential for plant growth?

• Nitrogen

• Oxygen

• Hydrogen

• Helium

Open Ended

Explain how producers, consumers, and decomposers interact to keep an ecosystem functioning.

Multiple Choice

Which of the following best describes the role of decomposers in an ecosystem?

• They break down dead and decaying matter to recycle nutrients.

• They create their own food using sunlight.

• They must eat other organisms for food.

• They provide shelter for other organisms.

Open Ended

How do decomposers keep the ecosystem running?

Open Ended

What would happen to the food web if one species is removed? Use evidence from the images to support your answer.

Multiple Select

Which statements about trophic levels are correct?

• Primary consumers eat producers.

• Secondary consumers eat primary consumers.

• Tertiary consumers eat secondary consumers.

• Producers eat primary consumers.

Open Ended

Explain why there are fewer organisms at higher trophic levels in an energy pyramid.

Open Ended

Why is there less energy available at higher trophic levels?

Open Ended

Match the following terms to their correct definitions: Producer, Primary Consumer, Decomposer, Trophic Level, 10% Rule.

Multiple Choice

Which of the following best explains why an energy pyramid gets smaller at the top?

• Because there are fewer organisms at higher levels.

• Because energy is lost as heat at each trophic level.

• Because the top levels are farther from the sun.

• Because only plants can make their own food.

Multiple Select

Which of the following are true about decomposers in an energy pyramid?

• They recycle nutrients back into the ecosystem.

• They are found at the base of the pyramid.

• They consume only plants.

• They break down dead material.

Multiple Choice

According to the 10% rule, if a plant contains 1000 units of energy, how much energy would be available to the primary consumer?

• 100 units

• 10 units

• 900 units

• 500 units

Multiple Choice

What is the primary source of energy in most ecosystems?

• The Sun

• Producers

• Consumers

• Decomposers

Open Ended

Summarize how energy flows through an ecosystem based on what you learned in this lesson.

Open Ended

Why does an energy pyramid get smaller at the top? Where does the lost energy go?