Energy Flow in Ecosystems
Explore the concepts of energy flow, food chains, food webs, and ecological pyramids in this Grade 10 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. Show all your work for calculations.
Match each organism to its correct trophic level in an ecosystem.
1. Grass
a. Primary Consumer
2. Rabbit
b. Producer
3. Snake
c. Secondary Consumer
4. Hawk
d. Tertiary Consumer
1. The ultimate source of energy for almost all ecosystems on Earth is the .
2. Organisms that produce their own food are called .
3. Only about percent of energy is transferred from one trophic level to the next.
4. Decomposers, such as bacteria and fungi, play a crucial role in recycling back into the ecosystem.
1. Which of the following best describes a food chain?
A network of interconnected food chains.
A single pathway of energy transfer.
The feeding relationships between all organisms in an ecosystem.
The process of photosynthesis.
2. If a producer has 10,000 units of energy, how much energy would typically be available to a secondary consumer in that ecosystem?
10,000 units
1,000 units
100 units
10 units
Observe the food web above and answer the following questions:
1. Identify two producers from the food web.
2. Name one organism that is both a primary and secondary consumer.
3. What would happen to the population of snakes if the hawk population decreased significantly?
1. Explain the difference between a food chain and a food web.
2. Describe the concept of an energy pyramid and why it is always upright.
1. Decomposers are at the top of every food chain.
True
False
2. Herbivores are primary consumers.
True
False
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