Ecosystem Quiz

How is the crane dependent on the grass and the algae?

• The crane consumes organisms that eat the grass and the algae.

• The crane is not dependent on the grass and the algae.

• The crane is an herbivore.

• The crane needs the vegetation for its habitat.

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Which processes cycle matter and help to sustain an ecosystem and keep it healthy? Select all correct answers.

• A water cycle

• A carbon cycle

• A nutrient recycling through decomposers

• A rock cycle

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Use the diagram of the food web to answer the question. Which role is correctly placed in each position? Which numbers match each label?

• 1: Producer; 2: Primary Consumer; 3: Secondary Consumer; 4: Tertiary Consumer

• 1: Producer; 2: Tertiary Consumer; 3: Secondary Consumer; 4: Primary Consumer

• 1: Tertiary Consumer; 2: Secondary Consumer; 3: Primary Consumer; 4: Producer

• 1: Primary Consumer; 2: Secondary Consumer; 3: Tertiary Consumer; 4: Producer

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The model shows water cycling through Earth’s systems. The water cycle is affected by energy from the sun and by the force of gravity. Which answer correctly matches the terms with their position in the diagram?

• 1: Evaporation; 2: Condensation; 3: Precipitation

• 1: Evaporation; 2: Precipitation; 3: Condensation

• 1: Precipitation; 2: Condensation; 3: Evaporation

• 1: Precipitation; 2: Evaporation; 3: Condensation

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Matter cycles and flows through living and nonliving parts of an ecosystem. Nitrogen in the soil is taken up by _______ and later passed back to the soil by _________________. Which terms, in order of appearance, best complete the sentence?

• producers; tertiary consumers

• primary consumers; tertiary consumers

• decomposers; producers

• producers; decomposers

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Which statement describes the amount of energy passed to the banded mongooses as shown in this pyramid?

• The mongoose has 50 percent of the energy in the pyramid available to it.

• The mongoose has the most amount of energy available to it.

• The mongoose has no energy available to it.

• The mongoose has the least amount of energy available to it.

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Look at the energy pyramid. Energy is passed from one level to the next within this pyramid. Which list shows a possible amount of energy at each of the levels?

• 1: 1 kcal; 2: 10 kcal; 3: 100 kcal; 4: 1000 kcal

• 1: 100 kcal; 2: 10 kcal; 3: 1 kcal; 4: 1000 kcal

• 1: 1000 kcal; 2: 100 kcal; 3: 10 kcal; 4: 1 kcal

• 1: 100 kcal; 2: 1000 kcal; 3: 10 kcal; 4: 1 kcal

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Why are there so few beluga whales compared to the number of Arctic bumblebees on our planet?

• Arctic bumblebees do not have predators, which makes them more numerous.

• Beluga whales do not have predators, which makes them more numerous.

• Arctic bumblebees are at the bottom of the food chain and must eat more organisms but receive a smaller energy transfer.

• Beluga whales are at the top of the food chain and must eat more organisms but receive a smaller energy transfer.

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__________ break down dead organisms into nutrients and gases so they can be used by other organisms. __________ can enter or exit an ecosystem at any point and can cycle continuously. Which terms best complete the sentences?

• Decomposers; Nutrients

• Decomposers; Bacteria

• Consumers; Nutrients

• Consumers; Bacteria

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Look at the image of the energy pyramid. Which statements correctly describe the energy in the trophic levels as organisms move up the energy pyramid? Select all that apply.

• Total amount of energy decreases from the grasshopper trophic level to the lizard trophic level.

• Producers have less energy, and consumers have more.

• Energy is lost as organisms move up trophic levels.

• Predators at the top of the pyramid have more energy.

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