How Do Weathering and Erosion Shape Earth's Surface?

What will happen to rocks in a fast-moving stream as they bump and scrape against one another?

• They will get larger.

• They will get smaller.

• They will get sharper.

• They will get heavier.

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NGSS.4-ESS2-1

Ms. Garcia asks her science class to design an activity that will make rocks smooth like the ones they find near the river. Which activity shows how a river makes rocks smooth?

• Place the rocks in direct sunlight.

• Bury the rocks in soil under water.

• Put the rocks under a heavy weight.

• Shake the rocks in a container of water.

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Which of the following landforms is the result of weathering and erosion because of the movement of water?

• sea arch

• forest

• desert

• mountain

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Wind, like water, can cause erosion. Which of the following choices is an example of wind erosion?

• alluvial fan

• moraine

• sand dunes

• tides

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Which of the following choices is a result of water erosion?

• barrier islands

• canyons

• small rocks

• smooth stones

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Which is an example of erosion?

• floodwater carrying dirt downstream

• wind carving a rock cliff

• sand and dirt collecting at the mouth of a river

• ice filling a space in a rock and cracking bits of rock

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How do plants prevent soil erosion?

• Roots take in water from the soil.

• Green leaves produce food for the plant.

• Plants provide food for plant eaters.

• Plant roots hold soil in place.

Which two processes worked together to create this delta landform?

• deposition and weathering

• erosion and deposition

• weathering and erosion

• flooding and weathering

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Which is not a natural form of erosion?

• a rock rolling down a hill

• waves moving sand on a beach

• rain falling on a grassy field

• a garden hose washing dirt down a driveway

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What causes sand dunes to form?

• ice

• water

• wind

• gravity

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