Energy Flow in Ecosystems
A Grade 11 science worksheet covering energy flow, food chains, food webs, and ecological pyramids.
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Energy Flow in Ecosystems
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Read each question carefully and answer to the best of your ability. Show all work where applicable.
1. What is the primary source of energy for almost all ecosystems on Earth?
Geothermal vents
Chemical reactions
Solar energy
Decomposition
2. Which of the following organisms is a producer?
Lion
Deer
Algae
Mushroom
3. The process by which producers convert light energy into chemical energy is called .
4. Organisms that obtain energy by consuming other organisms are called .
5. A food shows the complex feeding relationships within an ecosystem.
6. Energy flows in a single direction through an ecosystem.
True
False
7. Decomposers play a crucial role in recycling nutrients back into the ecosystem.
True
False
8. Explain the 10% rule of energy transfer in a food chain.
9. Differentiate between a food chain and a food web.
10. Analyze the food web below and answer the questions that follow.
a) Identify the producers in this food web.
b) Name two organisms that are primary consumers.
c) Name two organisms that are secondary consumers.
d) What would happen to the population of snakes if the population of mice significantly decreased?