Forests and grasslands are both examples of terrestrial ecosystems. Which best describes the differences between forests and grasslands?

• Forests have more trees but usually less rain than grasslands.

• Grasslands have more trees but usually less rain than forests.

• Forests have more trees and usually more rain than grasslands.

• Grasslands have less trees but more rain than forests.

Which statement is true?

• The sun is only important to the plant community.

• The sun is important to all parts of an ecosystem.

• The sun is only important during winter months.

• The sun is only important summer months.

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Which best describes the role of a tiny plant in a coral reef ecosystem?

• It is the start of many coral reef food chains.

• It provides food and shelter to large predators.

• It must get food energy from a source other than the sun.

• It is a direct source of energy for all of the animals in the ecosystem

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Which two ecosystems are aquatic?

• estuaries and forests

• forests and grasslands

• saltwater marshes and estuaries

• saltwater marshes and tropical rainforests

Layla’s class is studying ecosystems. Her teacher gave the description below.

“This ecosystem would support trees if it got enough rain. Little precipitation and thin soil make it difficult for this ecosystem to support many trees.”

Which ecosystem does this scenario best describe?

• estuary

• grassland

• marsh

• forest

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Which best explains why an ecosystem can support a variety of organisms?

• Each organism takes care of itself.

• The organisms are in constant competition.

• The organisms give off carbon dioxide the producers need.

• Each organism contributes something to help the other organisms survive.

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Which terrestrial ecosystem has warm, humid conditions and a large variety of plants and animals?

• estuary
• grassland
• deciduous forest
• tropical rainforest

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Which can be concluded about the trees that grow in a temperate deciduous forest?

• The trees require constant direct sunlight to survive
• The trees grow only during the warm months of the year
• The trees have adapted to survive the change of seasons
• The trees are unable to grow in climates that have constant rainfall

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Which marine ecosystem would be best for organisms that can adapt to both salt water and fresh water?

• Estuary
• Lake
• Pond
• River

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Which ecosystem contains the largest mammals?

• ocean
• pond
• river
• swamp