5.12B - Changes to Ecosystems - Unit Assessment

Based on the information given in the chart, why do overpopulated animals wander?

• Their natural ecosystem can no longer support them.

• They migrate to compete with other species for garbage.

• Their natural ecosystem has a vast supply of food and water.

• They migrate to areas where there are fewer producers.

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NGSS.MS-LS2-1

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Students conduct outdoor investigations in a marshy area.  They collect water samples for viewing under the microscope to determine if pollution has impacted the health of the pond.  The water is oily and shiny, and students are not sure what is in the water.  All are good precautions to use while gathering the water samples EXCEPT -

• wearing rubber gloves 

• running around the pond

• keeping long hair tied back

• staying with the group

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NGSS.MS-LS2-4

Humans are part of the ecosystem and therefore impact it.  Which of the following events in an ecosystem may produce a negative effect?

• Preventing deer from depleting food resources.

• Restoring a natural habitat.

• Wildlife rangers minimizing distrubances.

• A lumber company clearing a forest.

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NGSS.MS-ESS3-4

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Scientific evidence predicts events that will occur because of the overpopulation of grazers.  Which of the following is NOT a change caused by the overpopulation of grazers?

• Grazers have less food to eat.

• Grazers wander into unnatural habitats.

• Grazers have access to unlimited resources.

• Grazers are susceptible to more diseases.

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Which of the following is a way humans can positively impact ecosystems?

• Waste dumping

• Using biodegradable products

• Overhunting animals

• Industrial pollution

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NGSS.MS-ESS3-3

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Scientific research shows that as tundra vegetation zones continue to move northward with the changing climate, caribou and reindeer may have a more difficult time finding food.  Which prediction below best explains the effect of this change on caribou and reindeer?

• Caribou and reindeer population may increase because of their dependence on tundra vegetation.

• Caribou and reindeer populations will not be affected by this change to the ecosystem.

• Caribou and reindeer populations may decline because of their dependence on tundra vegetation.

• Caribou and reindeer populations will increase as the food supply decreases.

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

Overpopulated animals cause severe damage to an ecosystem and the surrounding landscape.  Additionally, overpopulation can affect food webs, water routes, and land.  Based on the information provided, which of the following is the best conclusion about the effects of overpopulation?

• Overpopulation is destroying the entire United States.

• Overpopulation does not impact food webs.

• Overpopulation can change the entire structure of an ecosystem.

• Overpopulation causes serious issues with the water cycle.

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In order to reduce the negative impact on the ecosystem, it is important that people -

• make informed choices in conservation

• demonstrate safety practices

• record data using technology

• neglect wildlife regulations

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NGSS.MS-ESS3-4

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In class, students learn that conserving water reduces the human impact on area watersheds.  Students investigate whether 4th graders or 5th graders use the most water when washing their hands.  Which part of the investigation should be recorded?

• Height of the students

• Time the faucet is turned on and off

• Size of the sink

• Location of area watersheds

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NGSS.MS-LS2-1

Hunting is an environmental management tool that helps control wildlife populations.  Hunting is an example of -

• the deer population creating change in an ecosystem

• the food web creating change in an ecosystem

• humans creating change in an ecosystem

• a cycle creating change in an ecosystem

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NGSS.MS-LS2-4

NGSS.MS-LS2-5