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20 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is weathering?
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Earth's agent physically breaking down rock
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What is erosion?
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transportation of weathered materials
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E-ROOOOOOOOOOOOOOOOOOO-DING
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What is the importance of the study of weathering and erosion?
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- enriches soils by releasing minerals
- study of natural destruction on structures |
society
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What is chemical weathering?
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when the chemical compostion of minerals/rocks is changed
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What is mechanical weathering?
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physical break down of rock but chemical composition remains the same
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throwing, hitting, EEee-ya!
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What are the (3) types of Mechanical Weathering
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1) Exfoliation
2) Frost Wedging 3) Abrasion |
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Exfoliation
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pressure is released, expands, and separates into sheets and breaks
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Frost Wedging
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water enters rock cracks, freezes, and expands to enlarge the crack and break
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Abrasion
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rocks collide and scrape each other surfaces
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What is soil?
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most common and valuable product of weathering
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What are the layers / horizons of soil?
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O, A, E, B, C
top ---> bottom |
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Characteristics of O level?
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- loose organic material
- considering top soil |
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Characteristics of A level?
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- inorganic matter
- top soil - humus |
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Characteristics of E level?
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little of no organic matter
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Characteristics of B level?
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- illuviation
- contains materials from previous layers |
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Characteristics of C level?
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- weathered parent material
- partially oxidized - weathered bedrock |
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Types of soil?
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(1) Laterites
(2) Pedocals (3) Pedalfers |
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Laterite soil
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- extensive weathering
- moist climates - rainforests |
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Pedocals
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- not furtile
- arid, sparse plant life |
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Pedalfers
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- Rich / organic
- forestry - varying climates - our land |
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