Amoeba Sisters Food Webs and Energy Pyramids

Which best describe the pathway of a typical food chain?

• Producer → Primary consumer → Secondary consumer → Tertiary consumer

• Producer ← Primary consumer ← Secondary consumer ← Tertiary consumer

• Primary consumer → Producer → Secondary consumer → Tertiary consumer

• Primary consumer ← Tertiary consumer ← Secondary consumer ← Producer

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When one trophic level consumes another, how much stored energy is transferred to the next consumer?

• 5%

• 10%

• 25%

• 90%

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Multiple food chains that interact together.

• Trophic levels

• Energy pyramids

• Biomass pyramids

• Food webs

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The variety of all types of organisms living in a given area.

• Abiotic factors

• Population

• Biome

• Biodiversity

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Which two examples are decomposers?

• Turkey vultures and crows

• Moss and Lichen

• Hyenas and hawks

• Bacteria and fungi

Examine the pyramid above. If the grass has 2000 units of stored energy, how many units will be passed onto the grasshopper?

• 2

• 20

• 200

• 20,000

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What does a food chain show?

• how producers use sunlight to make food energy

• how living things depend on each other for food

• where resources are found in a habitat

• why plant and animal matter break down

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What role do plants play in a habitat?

• They produce food energy from sunlight.

• They break down dead matter.

• They are prey for predators.

• They recycle nutrients from dead matter.

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This diagram shows how energy flows through an eco-system. What is the first source of energy in this pyramid?

• sharks and large birds

• algae, plankton and seagrass

• herbivorous fish, crustaceans and sea urchins

• seals and carnivorous fish

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Several owls live in a forest. The owls prey on mice. Hawks also prey on mice. Which might happen if several hawks move to the forest where the owls live?

• The number of owls will increase, and the number of hawks will decrease.

• The number of mice will increase, and the number of owls will decrease.

• The number of owls and hawks will increase.

• The number of owls and mice will decrease.

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