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64 Cards in this Set
- Front
- Back
Q.Define erosion
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Erosion is the wearing down and moving of rocks and soil from one place to another.
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Q. What does erosion begin with?
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weathering
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Q. Weathering is the --- of rocks and soil on Earth's surface.
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breaking up
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Q. Trees and other plants protect the soil from ---.
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erosion
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Q.
As rock becomes exposed on the surface, it is slowly broken into --- by wind, rain, and ice. |
smaller pieces
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Q.
At times, landslides, mudslides, or --- cause erosion to happen very quickly. |
storms
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Q.
Define weathering. |
breaking up of rocks and soil
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Q.
Moving water can cause ---. |
erosion
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Q.
Rain causes --- of rocks and soil. |
weathering
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Q.
Define run-off |
Run-off carries loosened soil into rivers.
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Q.
Flowing water may cut away the banks of a ---. |
river
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Q.
The water in oceans is always ---. |
moving
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Some rocks, like limestone, may break down or --- in water. |
dissolve
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Q.
Flowing water may --- down the riverbed and make a V-shaped canyon. |
break
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Q.
Ocean waves can deposit sand and soil to make --- and sandy beaches. |
sandbars
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Q.
Often the water in the middle of rivers flows ---. |
slowly
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Q.
Water that flows in rivers moves rocks and soil --. |
downhill
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Q.
What that flows across the ground is called ---. |
run-off
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Q.
What makes steep cliffs by the ocean? |
ocean waves
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Q.
What cuts away the banks of a river? |
the flowing water of the river
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Define a sandbar.
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deposits made by waves
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Q.
What formed the Mississippi River Delta? |
The Mississippi River Delta was made by deposits made by waves.
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Q.
When water freezes, it take up --- space. |
more
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Q.
Frost makes the cracks of a rock get ---. |
bigger
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Q.
Hailstones --- at the ground and loosen soil. |
pound
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Q. Glaciers are so --- that they press down very hard on the land.
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big and heavy
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Glaciers cut out --- valleys. |
U-shaped
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Q.
Define frost. |
frozen dew
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Q.
Define glacier. |
large sheet of slow-moving ice
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Q.
Define hailstone. |
hard, round pieces of ice
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Q.
Winds can blow so hard and fast that they can damage buildings and push over large ---. |
trees
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Q. As wind blows, the rock and soil particles --- against exposed rock.
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hit
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Q.
In a hurricane, pounding ocean waves can --- beaches. |
destroy
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Q.
Strong winds and heavy rain may form a --- over the ocean. |
hurricane
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Together wind and rain can loosen and move --- soil than they can separately. |
more
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Q.
When snowdrifts melt, the flowing water can move the rocks and soil, causing --- and flooding. |
erosion
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Q.
Bits of broken rock mix with air, water, and --- to form soil. |
humus
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Q.
Define humus. |
Humus is the remains of dead plants and animals.
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Q.
Soil forms ---. |
slowly
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Solid rock called --- is under the layers of soil. |
bedrock
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Q.
What are the two top layers are soil called? |
1. topsoil
2. subsoil |
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Woil often has --- layers. |
two
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Q.
Erosion from wind and --- carry away tons of soil each year. |
water
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Q.
Three hundred years ago, --- of the United States was covered by forests. |
one half
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Q.
Rapid run-off causes ---. |
flooding
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Q.
Most forest fires are started by ---. |
people
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The --- of Earth is always being worn away by water. |
surface
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Q.
The breaking up of rocks and soil on EArth's surface is caused by ---. |
weathering
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Large, slow-moving sheets of ice make up a ---. |
glacier
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Q.
Rainwater that flows across the ground is called ---. |
run-off
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Q.
STrong winds and heavy rain that form over the ocan are called ---. |
hurricanes
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Q.
Tiny bits of broken rock mix with air, water, and --- to form soil. |
humus
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Q.
Define topsoil. |
often the richest layer of soil
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Q.
Define frost. |
frozen dew
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Q.
Define sandbar. |
deposit of sand near the shore
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Q.
Moving water wears away land and moves rocks and soil ---. |
downhill
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Q.
Frost helps break up rocks by pushing against the ---. |
cracks
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Rocks land soil blown by the wind can --- |
wear away rock
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Q.
Each kind of rock makes a certain type of ---. |
soil
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Q.
People help cause weathering and erosion by ---. |
clearing the land
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Glaciers are large, slow-moving sheets of ---. |
ice
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Q.
Erosion is the --- of rocks and soil. |
moving
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Q.
Weathering is the --- of rocks and soil. |
breaking up
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Q.
What cuases most weathering and erosion on Earth? |
Most weathering and erosion on Earth is caused by moving water.
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