Human Impact on the Environment 4th Grade TN Ready #2

In some fields, farmers grow the same plant types each year. After a few years, the plants use up what they need to grow. So, these plants stop growing well. Also, insects that hurt the plantscan spread veryquickly.Another way of farming can help solve these problems. For one year, farmers grow one type of plant on half of their land. The farmers grow a different type of plant on the other half of the land. Then, the next year, they switch the plants from one half to the other. How does this way of farming help solve the problems

• Different plants help harmful insects grow more quickly.

• The plants will not use up what they need too quickly.

• The farmers don't need any soil for half of their plants.

• The farmers have more land on which to grow plants.

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NGSS.MS-LS2-1

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Extra fertilizer can be carried by runoff from rain into streams and lakes. The fertilizer causes water pollution. It can harm some animals and may cause too much algae to grow, as shown by the green film on the water in the picture. How can people prevent fertilizer from polluting the water?

• Only use fertilizer when the weather is dry.

• Use the fertilizer more often that it says to on the package.

• Use more fertilizer than it says to on the package.

• all of these

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NGSS.MS-ESS3-4

NGSS.MS-LS2-4

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At the coast, waves from the sea hit the land. As sea levels rise, these waves hit higher and higher on land. Each wave washes away land and makes it harder for plants to grow. Stronger waves carry away more land. When the types of plants change, the types of animals also change. Scientists want to plant mangroves on the coast to help solve this problem. Mangroves are small trees with many roots that can grow in salty water and in dirt. How does planting mangroves help the coast?

• Mangroves push the waves away so they don't touch the coast.

• Mangroves stop the sea level from rising higher on the land.

• Mangroves use up the sea water so the sea level falls.

• Mangroves help slow down the waves that take away land.

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NGSS.MS-ESS2-2

Which one of these actions would help reduce pollution in the ocean?

• dumping household chemicals in the ocean

• keeping litter off beaches

• telling friends to dump garbage in the ocean

• throwing plastic grocery bags in the ocean

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NGSS.MS-ESS3-3

Air pollution is a problem that has many serious effects on the environment. Many things, such as smoke from factories and exhaust from cars, contribute to the amount of pollution in the air. What are humans doing to decrease the amount of air pollution?

• closing all factories and sources of pollution

• working to cut down fumes from factories and cars

• forcing people to stop driving cars

• trying to pick up litter from the ground

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NGSS.MS-ETS1-3

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In the 1800s and early 1900s, many American ranchers and farmers moved west. They helped to settle the United States' western territories. The ranchers and farmers wanted to protect their families and livestock, so they killed many predators, including wolves. Today, there are too many animals such as deer, which were previously hunted by wolves. Scientists are trying to decrease the number of these over populated animals by setting up protected areas for wolves to live. How might this action affect western ecosystems?

• The wolves will cause the deer to become extinct.

• The wolves will cause western ecosystems to become polluted.

• This action will likely have no effect on western ecosystems.

• The wolves will bring the deer's population down to a reasonable level.

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NGSS.MS-LS2-1

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People have changed how rivers flow. They build walls that force the water to go in a different direction. Some water goes to cities to be used. In some places, a river's water is completely used up. The places where the river used to run become dry. Then, the kinds of plants and animals that live there change. Cities have come up with a way to help solve the problem. They ask people to grow desert plants in their yards instead of grass. They also ask people not to wash their cars as often. How do these steps help the area where a river used to run?

• The cities will use less water, which means the dry areas will have water again.

• People will not need any water, which means the river flow will not be changed at all.

• Desert plants will be planted where rivers used to run, which means the animals will come back.

• The river will have more water than before, which means the walls will not work anymore.

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NGSS.MS-ESS3-4

NGSS.MS-LS2-1

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