Year 8 Science: Unbalanced Ecosystems

What do thriving ecosystems have?

• Low biodiversity

• High biodiversity

• No biodiversity

• Moderate biodiversity

Biodiversity is the variety of _____ in the world or in a particular habitat.

How does biodiversity change as you move toward the equator?

• It decreases

• It remains the same

• It increases

• It fluctuates

What happens to ecosystem stability as biodiversity increases?

• It decreases

• It remains the same

• It increases

• It fluctuates

What is one negative impact of human actions on biodiversity?

• Increase in biodiversity

• Loss of biodiversity

• No impact on biodiversity

• Stabilization of biodiversity

Why are living things considered interdependent in an ecosystem?

• Because they all live in the same habitat

• Because they rely on each other for food, pollination, and decomposition

• Because they all have the same lifespan

• Because they all reproduce in the same way

How does biodiversity bring stability to an ecosystem?

• By increasing the number of species

• By reducing the impact of density-dependent factors

• By making all organisms identical

• By eliminating predators

Why is biodiversity important to people?

• It helps in the carbon and oxygen cycle and provides medicines

• It makes the environment look beautiful

• It increases the number of animals

• It reduces the need for agriculture

What is the definition of extinction?

• Complete disappearance of a species

• Species could go extinct because population is very low

• Species population is dropping and close to becoming endangered

• Natural increase of a species

Which of the following species is an example of an extinct species?

• Humpback Whale

• Piping Plover

• Dodo Bird

• Grizzly Bear