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Comp. weathering

Composition book notes for chapter 6

QuestionAnswer
How can you tell if a physical change has occurred in a rock? The shape or size of the rock has changed, not its composition
_______ are naturally occurring, inorganic solids that have specific crystal structures and specific chemical compositions Minerals
________________ priniciple states that the geological processes that operate today operated in the past Uniformitarianism
__________ works continuously to weather and carry away rocks at the earth's surface Erosion
In which type of climate does chemical weathering occur fastest? Hot and wet weather
Weathering is the process that ______ down rock and other substances Breaks
During _________, iron combines with oxygen in the presence of water to from rust Oxidation
What factors determine the rate of weathering? Type of rock and climate
What 5 materials make up soil? Rock particles, minerals, decayed organic material ( humus), water, and air
What would happen to the fertility of a soil if all decomposers were removed? The soil fertility would be low because the decomposers make humus
What caused the Dust Bowl? Drought and overplowing
Soil can be conserved through contour plowing, ________ ______, and crop rotations Conservation plowing
The value of soil is reduced when soil loses it's _________ and topsoil is lost due to erosion Fertility
In which soil conservation method are plant stalks used to protect the soil? Conservation plowing
In which method are fields tilled across the slope to slow the flow of water? Contour plowing
Why is so much effort used to save soil? Topsoil is best for plant growth, saving topsoil increases crop yield
Created by: Giana.gabriel
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