Energy Flow in Ecosystems

Energy Flow in Ecosystems

Read each question carefully and answer to the best of your ability. Use the provided space for your responses.

1. What is the primary source of energy for almost all ecosystems on Earth?

2. Which of the following organisms are producers in an ecosystem?

1. Organisms that produce their own food are called  .

2. A diagram that shows how energy flows through an ecosystem by feeding relationships is called a  .

3. Only about   of energy is transferred from one trophic level to the next.

1. Explain the difference between a food chain and a food web.

2. Describe the role of decomposers in an ecosystem.

1. All the energy from the sun is captured by producers.

2. Tertiary consumers eat primary consumers.

Examine the food web below and answer the questions.

1. Identify two producers in this food web.

2. Identify one organism that is both a primary and secondary consumer.

3. What would happen to the population of snakes if the population of mice significantly decreased?

Study the diagram of photosynthesis and answer the questions.

1. What are the reactants needed for photosynthesis?

2. What are the products of photosynthesis?

3. Why is photosynthesis essential for energy flow in most ecosystems?