the loose, weathered material on the Earth’s surface in which plants can grow.
What is soil
100
the management of soil to prevent its destruction.
What is Soil Conservation?
100
The layer of rock that forms Earth’s outer surface.
What is the crust?
100
The transfer of energy through space. Takes place with no direct contact between a heat source and an object. Sunlight is an example of this.
What is radiation?
100
The theory that pieces of Earth’s lithosphere are in slow, constant motion, driven by convection currents in the mantle.
What is Plate Tectonics?
200
the solid layer of bedrock beneath the soil.
What is bedrock?
200
The planting of different crops in a field each year to maintain the soil’s fertility.
What is crop rotation?
200
The layer of hot, solid material between Earth’s crust and core.
What is the mantle?
200
Heat transfer within a material or between materials that are touching. A spoon in a pot of hot soup heats up by this.
What is conduction?
200
stress force that pulls on the crust, stretching rock so that it becomes thinner in the middle. Like pulling apart bubble gum.
What is tension?
300
The dark colored, decaying organic material in soil.
What is humus
300
Plowing fields along the curves of a slope to prevent soil loss.
What is Contour Plowing?
300
A rigid layer made up of the uppermost part of the mantle and the crust.
What is the Lithosphere?
300
Heat transfer by the movement of currents in a fluid. Heated particles of the fluid begin to flow. This flow transfers from one part of the fluid to another. The soup in a pot is heated in this way.
What is convection?
300
stress force that squeezes rock until it folds or breaks. Like a giant trash compactor.
What is compression?
400
soil that is made up of about equal parts of clay, sand, and silt.
What is loam?
400
Method in which the dead stalks from the previous year’s crop are left in the ground to hold the soil in place
What is conservation plowing?
400
The soft layer of the mantle on which the lithosphere floats.
What is the Asthenosphere?
400
The idea, that the continents were once joined in a single land mass and have since drifted apart.
What is the Continental Drift?
400
stress that pushes a mass of rock in two opposite directions. Can cause rock to break and slip apart or to change its shape.
What is shearing?
500
a crumbly, dark brown soil that is a mixture of humus, clay, and other minerals. (also called A Horizon)
What is topsoil?
500
The area of the Great Plains where wind erosion caused soil loss during the 1930s
What is the Dust Bowl?
500
The geological principle that the same geological processes that operate today operated in the past to change the Earth’s surface.
What is Uniformitarianism?
500
The name of the single landmass that broke apart 200 million years ago and now made today’s continents.
What is Pangaea?
500
The shaking and trembling that results from movement of rock beneath Earth’s surface.