Chapter 27
暂无描述。系统推荐的高质量记忆内容，适合每天坚持背诵学习。
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the process that includes the physical or chemical breakdown of minerals on Earths surface
weathering
mixture of weathered rock, organic material, water, and air that is capable of supporting plant life
soil
the removal of surface material through the process of weathering
erosion
erosional agents like water, ice, wind, and gravity move eroded materials from one place to another in this process
sediment transport
when the erosional agent slows down or melts, it drips this sedimentary load in this process
deposition
drainage the land area that gathers water for a major river
drainage basin
the movement of water parallel to the shoreline
longshore current
Do rocks weather at the same rate?
no, they weather at different rates
What are the two main factors that determine how fast a rock will weather?
rock types and landscape
What are the two types of weathering?
mechanical weathering and chemical weathering
What type of change happens with mechanical weathering?
physical changes
What type of change happens with chemical weathering?
chemical changes
What are the 3 specific types of mechanical weathering?
frost wedging, biological activity, collisions
What causes frost wedging?
when water collects in the cracks of a rock then freezes
What is the cycle called during frost wedging?
“Freeze-Thaw Cycle”
What causes biological activity?
plant and animal activity
What causes weathering during collisons?
when rocks fall from a cliff or tumble through turbulent rivers
What is parent material?
where soil forms from
What are soil horizons?
the different layers of soil
How many soil horizons are there?
there can be up to 6
True or False. All soils contain every soil horizon.
false
What are the specific soil horizons?
O, A, E, B, C, R
What does the fist soil horizon contain?
organic material
What is the second horizon mostly made up of?
mostly minerals