Rocks And Weathering
How Soil Forms
Soil Conservation
Mechanical And Chemical Weathering
Types of Soil
100
The chemical weathering process that occurs when some minerals are exposed to oxygen and water over time.
What is oxidation?
100
The materials that make up soil .
What is air, water, organic matter, weathered rocks?
100
The method of soil conservation when farmers leave dead plants in the soil in their fields.
What is no-till farming?
100
Movement of rock fragments from one place to another.
What is erosion?
100
The material in the bottom horizon (R/D) is _______.
What is bedrock?
200
The mechanical weathering process that occurs when water freezes in the cracks of rocks and expands causing the rock to break apart.
What is ice wedging?
200
The __ horizon cotains a crumbly, dark brown soil that is a mixture of humus, clay, and other minerals.
What is the A horizon?
200
Cattle eat down to the roots and soil is exposed to wind and rain so it gets eroded.
What happens when a pasture is overgrazed?
200
Four types of erosion.
What are glaciers moving boulders, flood washing soil, wind blowing sand into town, gravity pulling rockslides downward?
200
The dark-colored decayed organic matter that supplies nutrients to plants and is found mainly in A layer of topsoil.
What humus?
300
Physical processes that break rock apart without changing its chemical makeup.
What is mechanical weathering?
300
The processes that break rock into smaller pieces.
What is weathering?
300
The process by which farmers plant a crop like clover to add nutrients and to keep the soil from blowing away in the winter.
What is cover crops?
300
Oxidation, Chemical Weathering, Mechanical Weathering and ice wedging all have something in common.
What is: types of weathering?
300
Vertical section of soil layers, each of which is a horizon.
What is soil profile?
400
Three examples of mechanical weathering.
What is: roots growing into rocks, ice wedging, burrowing animals?
400
The first layer of a horizon to form.
What is the bottom or bedrock?
400
The name of the method in which farmers plow their fields along the curves of a slope.
What is contour plowing?
400
When the minerals in rocks dissolve or change into different minerals.
What is chemical weathering?
400
The loose layer of dead plant remains over the top soil.
What is organic layer/litter?
500
Three examples of chemical weathering.
What is : acid rain, lichens on rocks, oxidation?
500
The soil in the B horizon where nutrients are leached from the layers above.
What is subsoil?
500
Farming method used to reduce erosion by building short retaining walls on hilly land.
What is terracing?
500
Growth of plant roots into rocks is a type of __________ weathering
What is mechanical?
500
This soil does not hold water well and is gritty.
What is sand.
M
e
n
u