Understanding Ecosystems

What are the three main components of an ecosystem?

• a. Producers, consumers, and decomposers

• b. Plants, animals and bacteria

• c. Air, water, and soil

• None of the above

Which of the following is a producer in an ecosystem?

• a. Deer

• B. Oak tree

• c. Mushroom

• c. Wolf

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True/False: Decomposers break down dead organisms and recycle nutrients.

• True

• False

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How does the removal of a top predator affect an ecosystem?

• a. Increases producer populations

• b. decreases consumer populations

• c. disrupts the balance of the ecosystem

• d. has no effect

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Which of the following organisms is a decomposer?

• a. Grass

• b. Rabbit

• c. Mushroom

• d. Eagle

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All plants are consumers.

• a. True

• B. False

What happens to an ecosystem if the decomposers are removed?

• a. Producers will increase

• b. Nutrient recycling will stop.

• c. More predators will appear.

• d. Nothing will change

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Which of the following is NOT part of an ecosystem?

• a. Water

• b. Sunlight

• c. Climate

• d. Moon

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What is the role of producers in an ecosystem?

• a. They decompose organic matter.

• b. They produce energy through photosynthesis

• c. They consume other organisms.

• d. They compete with consumers for food.

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Which of the following best describes a consumer in an ecosystem?

• a. An organism that produces its own food.

• b. An organism that decomposes dead matter.

• c. An organism that consumes other organisms for energy.

• An organism that provides shelter for other organisms.

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