NGSS.MS-LS2-1

which statement sounds accurate based on the graph data. 

• The zebra and lions do not affect each other
• when lions population increases, so does the zebra population
• When the zebra population increases, it causes the lion population to also increase
• when zebra populations go down, the zebra population goes up. 

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NGSS.MS-LS2-1

If there is more food than usual in an ecosystem, then the population will mostly likely...

• stay the same
• decrease
• increase

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NGSS.MS-LS2-1

What might happen if you remove a primary consumer from the ecosystem?

• There would be more food for secondary consumers.
• The number of primary consumers would increase.
• The number of plants would increase.
• The number of secondary consumers would increase.

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NGSS.MS-LS2-1

I pour two cups of Lucky Charms into a bowl. I pick out fifteen marshmallows. Fifteen marshmallows per two cups of Lucky Charms is an example of which of the following?

• Limiting factor

• Biotic potential

• Ecosystem

• Population density

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NGSS.MS-LS2-1

Which food web would be likely to survive if a one species of plant were lost due to disease?

• Food Web 2, the feeding relationships are less complex

• Food Web 1, most herbivores can eat other organisms.

• Food Web 1, has the greater number of 1st level consumers.

• Food Web 2, a greater number of predators competing for food

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NGSS.MS-LS2-1

What are the biotic factors in this image?

• sunlight, elephants, and grasses
• sunlight, water,  and air
• elephants, plants, trees 

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NGSS.MS-LS2-1

If hawks were removed from this ecosystem, what is the most likely effect?

• Grass would increase because rabbits would decrease.

• Snake populations would decrease.

• Rabbit and mouse populations would decrease because more of them would be eaten by snakes.

• Grass and wildflowers would decrease because there would be an increase in rabbit and mouse populations.

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NGSS.MS-LS2-1

What will happen if a drought causes the population of grass to decrease?

• The population of decomposers will decrease because there are less organisms dying.

• The population of owls will not be affected because they are predators who do not eat grass.

• The population of mice will decrease because there will be less food available due to the drought.

• The population of grasshoppers will increase because they will find a different, better food source.

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NGSS.MS-LS2-1

Fisheries renew themselves naturally each year, but __________________ has caused a shortage of fish in some areas.

• Aquaculture

• Fishing regulations

• Overfishing

• Global warming

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NGSS.MS-LS2-1

Scientists have been studying the size of three populations in Peru. In this ecosystem, pumas (large wild cats) eat deer, and deer eat grass. The data showed that all three populations were stable. Then the puma population increased suddenly. What will most likely happen to the size of the deer population as a result?

The size of the deer population will . . .

• increase

• decrease

• stay the same

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NGSS.MS-LS2-1