Human Impacts on Ecosystems

The diagram below shows the relationship between some of the organisms in a marine food web. Which of the following is MOST LIKELY to happen if a large number of phytoplankton are killed from runoff entering the ocean?

• The number of porpoises would probably stay the same because porpoises are far removed from phytoplankton in the food web

• The number of zooplankton would probably increase because they wouldn’t have to compete with phytoplankton for food.

• The number of salmon would probably decrease because there would be less food available for zooplankton and herring.

• The Sun would probably not emit as much energy because there would not be as many phytoplankton in the ocean.

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NGSS.MS-LS2-1

NGSS.MS-LS2-2

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Which of the following is associated with dead zones in the ocean?

• A decrease in nitrogen levels.

• An increase in oxygen levels.

• An increase in the number of fish.

• Runoff from fertilizers.

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NGSS.MS-LS2-5

If the acidity in the oceans keep increasing every year, which poses a greater threat to the ocean life?

• coral reefs - the acid eats away at the calcium carbonate that makes up the reef.

• algae - the acid makes it easier for the algae to grow.

• sea turtles - the acid strengthens their shells.

• kelp - the acid strengthens their ability to keep their roots attached.

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NGSS.MS-ESS3-4

NGSS.MS-LS2-4

In lakes that are exposed to acid rain, fish populations are declining. This is primarily due to changes in which type of dependence?

• Weather

• Recreation (Fun stuff)

• Shipping and fishing

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NGSS.MS-LS2-4

The environmental impact of mining includes erosion, loss of biodiversity, contamination of soil and water.

• Short Term Impact

• Long Term Impact

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NGSS.MS-ESS3-4

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Match the following Major Human Impacts

• Depletion of groundwater

• Mountains

• Air pollution

• Forests

• Overgrazing by livestock

• Deserts

• Damage from off-road vehicles

• Grasslands

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NGSS.MS-ESS3-4

Match the following Human Impacts

• Agriculture

• Grasslands

• Clearing for agriculture, livestock, timber, and urban development

• Forests

• Conversion to Cropland

• Deserts

• Large desert cities

• Mountains

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NGSS.MS-LS2-1

NGSS.MS-LS2-4

NGSS.MS-LS2-5

What is the biggest threat to Earth's lands?

• Unsustainable agriculture

• Pollution

• Mining

• Urban development

• Deforestation

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NGSS.MS-ESS3-4

How many percent of terrestrial ecosystems are degraded or used in an unsustainable way?

• 20%

• 40%

• 60%

• 80%

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NGSS.MS-LS2-4

NGSS.MS-LS2-5

Burning Fossil Fuels

• Positive Impact

• Negative Impact

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NGSS.MS-ESS3-4

NGSS.MS-ESS3-5