G 09 - 4.2 Energy Flow in Ecosystems

What is the primary source of energy for most ecosystems?

• water

• wind

• soil

• sunlight

Which of the following organisms are considered producers?

• herbivores

• decomposers

• phytoplankton

• omnivores

What percentage of energy is typically transferred from one trophic level to the next?

• 1%

• 10%

• 50%

• 100%

Which of the following is a primary consumer?

• grasshopper

• fox

• mushroom

• eagle

What is a food web?

• A single pathway of energy flow

• A complex network of feeding relationships

• A diagram showing energy loss

• None of the above

Which of the following best describes a detritivore?

• An organism that produces its own food

• An organism that consumes dead organic matter

• An organism that only eats plants

• An organism that eats only animals

In an energy pyramid, which level has the largest biomass?

• Producers

• Primary consumers

• Secondary consumers

• Tertiary consumers