Photosynthesis Food Chain Webs and Pyramid Review

What is an autotroph?

• Makes its own food

• Eats others for energy

• Process by which plants make sugar for energy

• Only eats plants

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What is the role of decomposers in a food chain?

• Use sunlight to make food

• Eat other organisms to gain energy

• Make the food for the whole food chain

• Break down dead organisms and add nutrients to the soil

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What may happen if the snowshoe hare was removed from the food web pictured?

• The insects in the habitat would increase.

• The shrew population would decrease due to being only hawk food source.

• The willow tree population would decrease.

• Foxes would dies due to no food source. 

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Which organism has the most energy in the diagram?

• frogs

• grass

• bird

• grasshopper

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Which organism has the least amount of energy available in the diagram?

• grasshopper

• frog

• grass

• bird

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Which organism is a producer/autotroph?

• grasshopper

• frog

• grass

• bird

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What do the arrows of a food web represent?

• the direction of energy flow

• who eats who in the food chain

• the organisms that live together

• the distance between organisms

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What is the main source of energy for photosynthesis and all food webs, chains, and energy pyramids?

• the moon

• consumers

• water

• the sun

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What is the major difference between food webs and food chains?

• food chains provide more information

• food webs show multiple relationships between more organisms

• food webs and food chains are the same

• food chains are more scientific

How much energy passes from one level of the food chain to the next?

• 90%

• 1%

• 10%

• 70%

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