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Geography 12: Weathering And Erosion > Weathering > Flashcards

Flashcards in Weathering Deck (15)
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1

Weathering

Doesn’t involve the transportation of weathered materials

Breakup of rock

2

Erosion

Involves the transportation of weathered materials
Shapes the earth

3

Agents of erosion

Water
Ice
Wind
Gravity

4

Physical/mechanical weathering

Breakup of rock
No change to composition

5

Agents of weathering

Rain
Wind
Heat
Cold

6

Chemical weathering

Decay of rock
Change of chemical composition
Prominent in tropical regions

7

Types of physical weathering

Plant roots
Frost shatter
Thermal expansion
Exfoliation

8

Plant roots

Grow into cracks and break rocks apart

9

Thermal expansion

Prominent in regions of huge temp fluctuation
Heat= expand cold =contract

10

Exfoliation

Thin layers of rock peel off outer surface of rock face.
Rocks formed at great pressure become exposed, no longer any pressure rock begins to come apart.

11

Frost shatter

Northern temperate regions
Water entering cracks in rocks may freeze and expansion of the cracks overtime. Rock eventually breaks.

12

Forms of chemical weathering

Solution
Hydrolysis
Oxidization

13

Solution

CO2 combines with water to form carbonic acid

14

Hydrolysis

Carbonic acids break down silicates (high clay content)

15

Oxidization

Oxygen and water
(iron oxide= rust)