Weathering
Erosion
Deposition
Soil
Soil Conservation
100
The breaking down of rock into smaller pieces by physical or chemical means.
weathering?
100
While weathering breaks down rock, erosion _________ sediment from one place to another.
moves?
100
Deposition is the process that sediment is _____________.
laid down or dropped?
100
Soil is deposited in layers called ________.
a horizon?
100
These help prevent wind erosion of soil by growing their roots deep in the ground.
plants?
200
The two kinds of weathering are...
mechanical and chemical?
200
What are the five agents of erosion?
gravity, wind, running water, waves, and glaciers (ice)?
200
A fan-shaped deposit that forms on dry land.
an alluvial fan?
200
The dark, organic material formed in soil from the decayed remains of plants and animals (also known as the O-Horizon).
humus?
200
A soil conservation technique that prevents erosion on steep hills by making smaller flatter fields like "steps".
terracing?
300
______ is what happens when wind blows sand and silt against exposed rock and wears it away.
What is abrasion?
300
A huge sheet of ice that slowly moves over land taking rocks and other sediment with it.
a glacier?
300
A huge deposited mound of sand...
a dune?
300
The A-horizon is also known as ___________ because it is usually rich in humus and good for growing plants.
topsoil?
300
This conservation technique leaves old dead crop material behind to reduce runoff.
no-till farming?
400
The burning of fossil fuels has added increased amounts of sulfuric acid to the atmosphere which has also increased _______ _______________.
acid precipitation?
400
The sudden rapid movement of a large amount of material downslope.
a landslide?
400
A form of deposition that occurs at the mouth of a river where the current slows and large amounts of sediment are dropped.
a delta?
400
The B-horizon has little nutrients because of the process of ____________________ when water passes through the soil.
leaching?
400
This conservation technique allows farmers to plow with the shape of the land so the rows act as a series of dams instead of rivers.
contour plowing?
500
In the winter, water gets into the cracks of rock and expands, breaking the rock apart. This is called ____ _____.
ice wedging?
500
Every year I visit my grandmother for the holidays and her mailbox is slowly starting to lean. This is caused by...
creep?
500
When sediment is deposited and plants and animals are able to grow and use it as a habitat it becomes...
soil?
500
The bedrock is the bottom layer. It is weathered down to create soil and is also known as the _____________ rock.
parent?
500
This scientist invented the use of crop rotation with peanuts and soy beans to replenish the nutrients in the soil.
Who was George Washington Carver?
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