Ecosystem Review Quiz

Which best describes a difference between estuaries and ponds?

• Ponds flow into the ocean and estuaries do not.

• Ponds are affected by tides and estuaries are not.

• Ponds are freshwater and estuaries are brackish water.

• Ponds have salt water and estuaries have brackish water.

In which two ecosystems would you find rattlesnakes, deer, and rabbits?

• forest and ocean

• ocean and estuary

• grassland and forest

• estuary and grassland

Which is a main difference between a grassland and forest ecosystem?

• the amount of trees, as forests have more

• the amount of trees, as grasslands have more

• their location, as only forests are found in North America

• their location, as only grasslands are found in North America

Which two ecosystems below provide homes for terrestrial organisms?

• estuaries and forests

• grasslands and forests

• estuaries and salt marshes

• grasslands and salt marshes

An ecosystem is a community of organisms interacting with their physical environment. Why are decomposers an important part of ecosystems?

• They break down dead organisms to return nutrients to the soil.

• They produce their own food for survival.

• They play a role in preventing weathering and erosion.

• They provide most of the energy to consumers.

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Living organisms have a role in weathering and erosion in the ecosystem. Which statement describes the role of bacteria and fungi?

• They hold soil in place during high winds.

• They decompose organic matter in the soil.

• They increase water access and flow and help aerate the soil.

• They grow within cracks of rocks, breaking the rock into small pieces.

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Which will most likely cause a decrease in predator populations?

• an increase in prey populations

• a decrease in prey populations

• a decrease in decomposers

• an increase in producers

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An energy pyramid shows that less food and energy is available moving from the bottom to the top. Based on this model, where would producers be located on the energy pyramid?

• Level 1

• Level 2

• Level 3

• Level 4

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Which best describes the role of a first-level or primary consumer in an ecosystem?

• Consumers eat producers and pass the energy along in an ecosystem.

• Consumers eat scavengers and pass the energy along in an ecosystem.

• Consumers eat decomposers and pass the energy along in an ecosystem.

• Consumers eat other consumers and pass the energy along in an ecosystem.

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In which category are all living things most directly dependent upon the sun for energy?

• carnivores

• producers

• herbivores

• decomposers

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