Balance in an ecosystem

If the population of prey increases, the population of predators will ________because of the availability of food.

• decrease
• stay the same
• increase

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NGSS.MS-LS2-1

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A meadow has too many rabbits. What would help balance this ecosystem?

• more rain that grass needs
• more foxes that eat rabbits
• fewer foxes that eat rabbits
• more grass for the rabbits to eat

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NGSS.MS-LS2-1

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The Texas Kangaroo Rat, native to north-central Texas, makes its home in mesquite bushes.  If the mesquite bushes are cleared for human homes , which of the following is the most probable result?

• The rat population will rise (increase).
• The rat population will decline (decrease).
• The rat population will stay the same.
• The rat population will double.

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NGSS.MS-LS2-1

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The dying out or extermination of a species.

• keystone species

• extinction

• endangered species

• habitat destruction

A species of animal or plant that is seriously at risk of disappearing from the planet.

• keystone species

• extinction

• endangered species

• habitat destruction

What type of succession is shown going from figure A to figure B?

• primary succession
• ecological succession
• secondary succession
• intermediate

What is the order of succession shown in this figure?

• A, B, C, D
• B, A, D, C
• C, D, A, B
• D, A, B, C

The picture shows what type of succession?

• primary
• secondary
• tertiary
• quadanary

What is the name given to lichen or algae after a primary succession?

• pioneer species
• volunteer species
• founder species
• conqueror species

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What are examples of pioneer species in a primary succession?

• Bushes and Shrubs
• Oak trees
• Mossess and Lichens 
• A rose Bush