NGSS.MS-LS2-4

What is the main cause of extinction of tigers?

• hunting
• climate change.
• disease.
• building of new homes

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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

What happens when an environment reaches its carrying capacity?

• Populations will decrease
• Resources such as food, water, and space will be unlimited
• Populations will increase
• Nothing, everything will stay the same.

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NGSS.MS-LS2-4

If wolves prey on deer for food, what will most likely happen to the deer population if wolves are removed from an area where deer live?

• The population of deer will increase.
• The population of deer will decrease.
• The population of deer will remain the same.
• The population of deer will become extinct.

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NGSS.MS-LS2-4

1. Why might an introduced animal species overrun native species in an ecosystem?

• . Its population size is smaller than those of native species.

• . It is more energy efficient, so it eats less food.

• It is a predator of the native species.

• It often has no natural enemies

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NGSS.MS-LS2-4

Which of the following are factors that could cause extinction?

• Destruction of animals' habitat

• Climate change

• Pollution

• Increased human population (more people)

• ALL of the above could cause extinction

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NGSS.MS-LS2-4

Insecticides are sprayed over a large area in an effort to reduce the number of grasshoppers that are eating the corn plants. How will this change affect this food chain? 

• The number of grasshoppers will increase
• The number of lizards will increase
• The number of lizards and hawks will decrease
• The number of grasshoppers, lizards, and hawks will decrease

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NGSS.MS-LS2-4

Many oak trees are cut down and removed from an

oak-hickory forest. A likely result of the direct

harvesting of the oak species would be the

• disruption of natural cycles

• conservation of these natural forest resources

• recycling of all the nutrients in the forest

• prevention of the extinction of animals native to

  the area

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NGSS.MS-LS2-4

Scientists monitoring frog populations have noticed that the ratio of male frogs to female frogs varies when certain chemicals are present in the environment. The influence of estrogen, for example, has a noticeable effect. In the presence of a higher amount of estrogen, it would be most likely that

• fewer males would be found because they are much larger and fewer are produced

• fewer females would be found because they are more sensitive to pesticides

• more males would be found because estrogen promotes the development of male characteristics

• more females would be found because estrogen promotes the development of female characteristics

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NGSS.MS-LS2-4

Why is it dangerous if wastewater is emptied directly into the Ottawa river?

• Wastewater can flow too quickly into the ocean and cause the sea level to rise.

• Wastewater can evaporate and cause air pollution.

• Wastewater does not mix well with fresh water, so disrupts the flow of fresh water.

• Wastewater often contains contaminants that can end up in Lake Erie and damage the ecosystem.

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NGSS.MS-LS2-4