7th grade: Biodiversity and Biomes

When an area has a large variety of organisms, it is said to have high ________.

• climate

• biodiversity

• temperature

• population population

When a non-native species thrives (does well) in a new environment, it will cause the native species

• increase in number

• stay the same number

• decrease in number

• try to imitate it

When we say an environment is sustainable, it means it ...

• dies off quickly

• has very little biodiversity

• changes often

• keeps on going and has high biodiversity keeps on going and has high biodiversity

What happens to a rainforest's biodiversity as more & more people cut down trees for human

• biodiversity is not changed

• biodiversity is increased

• biodiversity is decreased

• no one knows!

Which biome has more biodiversity?

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A drought has hit this grassland biome. How will this effect the rabbit population?

• The rabbits will increase in number.

• The rabbit population will stay the same.

• The rabbit population will decrease.

• The rabbit population will become extinct immediately.

In this tundra food web, if grasses were removed what would happen to the sustainability of the ecosystem?

• There would be an overpopulation of arctic hares and lemmings.

• Polar bears would move to a new ecosystem

• The ecosystem would collapse because it lost its main producer

• Wildflowers would die out from the ecosystem

Invasive species are usually brought to their new environment by...

• Humans

• Flying

• Swimming

• None of these

A species that is introduced from another ecosystem is called...

• Keystone Species

• Keystone Predator

• Invasive Species

• New Species

Which food web is more sustainable?

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