Rocks and Weathering
Soil
Geology
Minerals
Weathering & Soil
100
The rate of this is faster in hot, wet climates than in cold, dry climates.
What is chemical weathering?
100
The practice of plowing fields along the curves of a slope.
What is contour plowing?
100
They infer from the rounded, eroded shapes of the Appalachian Mountains that the mountains have been eroding for millions of years.
Who are geologist?
100
Rock that forms from the cooling of magma below the surface or lava at the surface.
What is igneous rock?
100
The type of weathering that occurs due to release of pressure.
What is mechanical weathering?
200
This causes mechanical weathering of rock by means of freezing and thawing of water.
What is ice wedging?
200
When a drought struck the Great Plains during the 1930s it helped to cause this.
What is the Dust Bowl?
200
A thick mass of tough roots that keeps the fertile soil of the prairies in place and holds on to moisture.
What is sod?
200
Rock that forms from laying down layers of sediment.
What is sedimentary rock?
200
The movement of rock particles by ice, wind, water, or gravity.
What is erosion?
300
After this, the makeup of the weathered rock is different from that of the original rock.
What is chemical weathering?
300
To restore soil’s fertility, a farmer might plant legumes as part of a soil conservation technique.
What is crop rotation?
300
The loose material on Earth’s surface that contains weathered rock particles and humus.
What is soil?
300
Something in the earth formed by a natural process.
What is are minerals?
300
This causes the mineral composition of rocks to change.
What is chemical weathering?
400
A rock containing iron becomes soft and crumbly and this color when it has been chemically weathered by oxygen.
What is a reddish-brown?
400
The loose layer of leaves on the surface of the soil.
What is litter?
400
Dead weeds and stalks of the previous year’s crop left in the ground to retain moisture and hold the soil in place.
What is conservation plowing?
400
The repeating pattern of a mineral’s particles.
What is a crystal?
400
This causes mechanical weathering of rock by means of freezing and thawing of water.
What is the Ice wedging?
500
The agent of mechanical weathering in which rock is worn away by the grinding action of other rock
What is abrasion?
500
Most of the work of mixing humus within the soil is done by these.
What are earthworms?
500
Rock that forms from the laying down of layers.
What is sedimentary rock?
500
The possible stages in the this are volcanic activity, erosion, and melting.
What is the rock cycle?
500
The practice of plowing fields along the curves of a slope.
What is contour plowing?
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