Unit 6: Ecology Review

Nonliving components of an ecosystem, such as rocks, light, and water, are __________ factors.

• Biotic

• Abiotic

• Ecological

• Energy

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Which of the following best describes a BIOTIC factor in an ecosystem?

• The temperature of the water

• Chemical pollutants in a stream

• Bacterial communities in the soil

• Sunlight

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In which level of ecological organization are abiotic factors considered along with biotic factors?

• Ecosystem

• Community

• Population

• Species

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If a scientist is concerned with studying all the different populations in a particular area (excluding abiotic factors), they are studying a(n) __________.

• Ecosystem

• Population

• Community

• Organism

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Which of the following is a correct example of a POPULATION?

• Finches and warblers in Waukesha County in 2022

• Cats and dogs in Milwaukee

• Orangutans in Borneo in 1949

• Frogs in the world

Which best describes what a food chain shows you?

• Energy flow through an ecosystem

• Food flowing through an ecosystem

• Consumers going into other consumers

• Who eats who

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Where does the energy start in this food chain?

• Hawk

• Snake

• Sun

• Fungi

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The arrows in a food chain or web represents what?

• They point to the organism that is being eaten.

• They show what direction the energy is flowing between organisms.

• It shows how sunlight flows within an ecosystem.

• They represent how water is transferred within a habitat.

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How much energy is available to be passed on to the next trophic level in an ecosystem?

• 700%

• 20%

• 5%

• 10%

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What would happen to the blue whale population if the krill population went extinct?

• the blue whale population eats other things in the food web

• the blue whale population would increase

• The blue whale population would remain the same.

• the blue whale population would also decrease

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