Energy Pyramid, Food Chain/Web and Photosynthesis

How much energy is transferred up the pyramid at each trophic level?

• 90%

• 20%

• 10%

• 50%

Which trophic level has least amount of energy?

• producers

• secondary consumers

• primary consumers

• tertiary consumers

What has the lowest biomass in an ecosystem?

• rabbits

• foxes

• wolves

• plants

What does the decomposer do?

• Eat dead animals

• Eat dead plants

• Return nutrients back to the

  environment

• All of the above

How does the energy flow in an energy pyramids?

• up the pyramid

• down the pyramid

which trophic level has the most energy?

• tertiary

• secondary consumers

• producers

• primary consumers

All energy on Earth ultimately comes from what source?

• Water
• Sun
• Consumers
• Oxygen

What are plants called in a food chain?

• Producers
• Consumers
• Decomposers
• Scavengers

What are animals called in a food chain?

• Producers
• Consumers
• Decomposers
• Plants

What are the organisms that break down dead stuff?

• Producers
• Consumers
• Decomposers
• Organisms