Energy Flow in Ecosystems
Explore how energy moves through different trophic levels in an ecosystem with this grade 7 science worksheet.
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Energy Flow in Ecosystems
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Read each question carefully and answer to the best of your ability. Refer to the provided food web for some questions.
Observe the food web below to answer the following questions.
1. What is the primary source of energy for almost all ecosystems on Earth?
Geothermal energy
The sun
Chemical reactions
Wind energy
2. Which of the following organisms are considered producers in most ecosystems?
Animals
Fungi
Plants
Bacteria
3. Organisms that eat other organisms for energy are called .
4. A shows how energy is transferred from one organism to another in a straight line.
5. Decomposers, such as bacteria and fungi, break down dead organic matter and return to the soil.
6. Explain the difference between a food chain and a food web.
7. Identify one producer, one primary consumer, and one secondary consumer from the food web diagram.
8. Energy flows in only one direction through an ecosystem.
True
False
9. A hawk that eats a snake that ate a mouse is a tertiary consumer.
True
False
Use the words below to complete the sentences.
10. An animal that eats only plants is called a(n) .
11. A lion, which eats only meat, is an example of a(n) .
12. Humans are considered because they eat both plants and animals.
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