Energy Flow in Ecosystems Quiz

Which of the following best represents the flow of energy in a food chain?

What happens to the amount of available energy as it moves up the trophic levels in an energy pyramid?

• It increases

• It remains the same

• It decreases

• It fluctuates

Which of the following is a primary source of energy for most ecosystems?

• The Moon

• The Sun

• The Earth's core

• Ocean tides

In an ecosystem, which of the following processes is responsible for recycling nutrients?

• Photosynthesis

• Decomposition

• Evaporation

• Condensation

Which of the following best describes a food web?

• A linear sequence of organisms through which nutrients and energy pass

• A complex network of interconnected food chains

• A single path of energy flow in an ecosystem

• A diagram showing the number of organisms at each trophic level

How does energy enter most ecosystems?

• Through the consumption of plants by animals

• Through the absorption of sunlight by plants

• Through the decomposition of organic matter

• Through the movement of water

What role do decomposers play in the energy flow of an ecosystem?

• They produce energy for primary consumers

• They recycle nutrients back into the ecosystem

• They are the primary source of energy for producers

• They store energy for future use

Which of the following statements is true about energy transfer in a food chain?

• Energy is gained at each trophic level

• Energy is transferred out as heat at each trophic level

• Energy remains constant throughout the food chain

• Energy is created at each trophic level

What is the primary function of producers in an ecosystem?

• To consume other organisms

• To decompose organic material

• To convert solar energy into chemical energy

• To recycle nutrients

In an energy pyramid, which level contains the most energy?

• Tertiary consumers

• Secondary consumers

• Primary consumers

• Producers