Protecting Earth’s Resources

Wastes produced by agriculture, households, industry, mining, and other human activities can end up in ______________.

• groundwater
• streams and rivers
• oceans
• All of these choices

About 97% of the water on Earth is ___________________.

• fresh water
• groundwater
• salt water
• ice

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NGSS.MS-ESS2-4

When fertilizers run off farmland into streams and ponds, the nitrogen content of the water increases. This can lead to rapid growth of algae in a process called eutrophication. How can this process affect other organisms in the water?

• Oxygen is used up as algae is decomposed, reducing the amount available to other organisms.
• The water becomes better able to support aerobic organisms.
• The algae provide food for fishes and other organisms, leading to decreased algae populations.
• The extra nitrogen provides additional food for the other organisms, increasing their population.

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What is the most dramatic result of deforestation?

• land is no longer green and full of life
• pictures from space show deforestation
• loss of habitat for approximately 70% of the worlds species
• people can't explore rainforests

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NGSS.MS-ESS3-4

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Which has the least negative impact on wildlife habitat?

• agriculture
• development
• deforestation
• recreation

Tags

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Less rainfall in an area and higher temperatures could lead to ____________.

• urbanization
• deforestation
• desertification
• higher pollution

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What are some reasons deforestation occurs?

• clearing land for agriculture, ranching, and mining
• just wanting to destroy things
• Population moving from rural areas to cities
• to make room for infrastructure

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NGSS.MS-ESS3-1

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Wind is a __________ energy resource.

• Renewable
• Nonrenewable

Choose the best answers to complete the sentences below:

The heavily polluted water near the factory .................. the safety of the local people.

• endangers

• preserves

• contaminates

• is threatened

Tags

NGSS.MS-LS2-4

The word "disposal" means

• increasing

• the act of getting rid of something

• disovle

• a reduction in something