NGSS.MS-LS2-4

Field mice are the primary food source for horned owls in an area. Due to a drought, many field mice left the area. Which result would this drought most likely have on the horned owls?

• The horned owl population will consume more field mice.
• Horned owls will follow the field mice to a different area.
• The horned owl population will increase in the area.
• Horned owls will change to a plant-based diet.

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NGSS.MS-LS2-4

Melting of glaciers and polar ice caps....

• will result in cooler temperatures in the Arctic
• will result in sea-levels rising
• Will have no effect on ecosystems
• None of the above

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NGSS.MS-LS2-4

There are 3 species of birds on an island. Bird A has a heavy bill for eating big seeds and. Bird B has a sharply pointed bill for eating insects. Bird C has a sharp bill for eating insects and small seeds. If the insect population suddenly disappeared one season, which bird or birds would probably be least affected that season?

• Bird A
• Bird B
• Bird C
• Bird A and Bird B

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NGSS.MS-LS2-4

If the population of a certain predator increases, there is often _______ its prey

• a decrease the population of
• an increase of the population of 
• great news for its prey of
• no  impact found on

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NGSS.MS-LS2-4

Tornadoes can negatively affect an ecosystem when

• the saltwater they bring kills off burrowing insects
• their strong winds uproot many of the important plants
• the rise in water level they produce introduces harmful salt
• they bring higher temperatures favored by birds

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NGSS.MS-LS2-4

The permanent displacement of organisms would be an example of a

• long term effect of a natural disaster.

• short term effect of a natural disaster.

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NGSS.MS-LS2-4

What would happen if the primary consumers died out?

• the producers would grow and the secondary and tertiary consumers would die

• producers would die out

• consumers would grow

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NGSS.MS-LS2-4

What will happen if a factor that a species is dependent on decreases?

• The species will also decrease

• The species will increase

• nothing

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NGSS.MS-LS2-4

Which effect of mining for resources most directly impacts the biosphere?

• releasing dust into the air

• increasing erosion of soil

• adding sediment to waterways

• degrading habitats for animals

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NGSS.MS-LS2-4

Why is biodiversity important to ecosystems?

• It helps populations adapt to ecological changes.

• It increases at each level of the food chain.

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NGSS.MS-LS2-4