Food Chains, Food Webs, and Energy Pyramids

In a biology class, Isla, Samuel, and Benjamin were studying about food web. They came across a scenario where an owl and a weasel were competing for a certain organism. Can you guess which organism they were competing for?

• Hawk

• Spider

• Grasshopper

• Shrew

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What might happen if you remove a primary consumer from the ecosystem?

• There would be more food for secondary consumers.
• The number of primary consumers would increase.
• The number of plants would increase.
• The number of secondary consumers would increase.

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Abigail, Samuel, and Priya are observing their local ecosystem. They notice a sudden increase in the cricket population. What would be the most likely effect of this change?

• There would be a decrease in the small bird population.

• There would be a decrease in the grass/flowers population.

• There would be a decrease in the mice population.

• There would be an increase in the grass/flowers population.

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Zoe, William, and Nora went on a field trip to a local forest. They observed a food web and started discussing about it. How many primary consumers did they identify in that food web?

• 1

• 2

• 3

• 4

Abigail, Zoe, and Ethan are studying the energy flow in an ecosystem. They learned that when energy is transferred from one trophic level to the next, a certain percentage is passed on. What percentage of energy do they find is typically passed on to each tropic level?

• 10%

• 50%

• 90%

• 100%

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Liam has a garden where he grows various plants. How does Liam's garden obtain energy?

• The plants in the garden conduct photosynthesis.

• The plants in the garden consume other plants.

• The plants in the garden consume primary consumers.

• The plants in the garden consume secondary consumers.

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Aria, Arjun, and Anika are studying ecology and they learned that a food web in their local forest can be broken down into several separate

• food chains

• food pyramids

• producers

• consumers

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Rohan, Ethan, and Ava went on a field trip to a nature reserve. They observed the interactions between different organisms and their environment. Use their observations to answer the question.
What is a fitting description for what they observed?

• A Food Chain

• An Ecosystem

• A Food Web

• Biotic and Abiotic Factors

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Abigail, Aiden, and James went on a field trip to a local pond. They observed the ecosystem and noted down the food chain. Use their observations to answer the question.
The Mayfly they spotted is a food source for which 3 organisms?

• Frog, Dragon Fly and snake

• Frog, trout and dragon fly

• Frog, salamander and trout

• Frog and phytoplankton

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In a garden ecosystem, William noticed that the dead leaves and plants were disappearing over time. Arjun suggested that it might be the work of certain organisms. What role do these organisms, like bacteria and fungi, typically serve in this scenario?

• herbivore

• carnivore

• omnivore

• decomposer

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