Ecosystems Unit Common Assessment

What is a food web?

• A diagram that shows the flow of energy through an ecosystem

• A network of interconnected food chains in an ecosystem

• A single path of energy flow in an ecosystem

• A list of all the species in an ecosystem

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Which of the following is an example of a natural disaster that can disrupt an ecosystem?

• Deforestation

• Earthquake

• Urban development

• Agriculture

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How does human intervention typically impact the transfer of energy in food webs?

• It always increases energy transfer efficiency

• It can disrupt the balance and flow of energy

• It has no impact on energy transfer

• It simplifies the food web

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Describe the process of primary succession.

• It occurs in areas where no soil exists

• It occurs in areas where soil is already present

• It involves the re-establishment of a damaged ecosystem

• It is the final stage of ecological succession

What is the main difference between primary and secondary succession?

• Primary succession occurs faster than secondary succession

• Primary succession starts with soil, secondary does not

• Primary succession starts without soil, secondary starts with soil

• There is no difference between them

Explain how secondary succession can affect species diversity.

• It decreases species diversity permanently

• It initially decreases diversity but can increase it over time

• It has no effect on species diversity

• It only increases species diversity

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Why is biodiversity important for the stability of an ecosystem?

• It reduces the number of species

• It increases the ecosystem's resilience to changes

• It makes the ecosystem more vulnerable to changes

• It has no impact on ecosystem stability

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Which of the following best describes ecological succession?

• A sudden change in an ecosystem

• A gradual process of change and replacement in an ecosystem

• The extinction of species in an ecosystem

• The introduction of new species into an ecosystem

How can population changes impact the energy flow in a food web?

• They have no impact on energy flow

• They can alter the balance of predator and prey relationships

• They always increase energy flow

• They simplify the food web

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What role does biodiversity play in the health of organisms within an ecosystem?

• It provides a variety of resources and habitats

• It limits the resources available to organisms

• It decreases the health of organisms

• It has no role in organism health

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