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Name ________________________________________
Period ______
Weathering and Erosion
Weathering- The process that ______________ rocks and other materials of Earth’s crust into
smaller pieces.
Erosion- The _______________ of rock particles by wind, water, ice, or gravity.
Weathering and erosion work together to wear down and carry away __________ on Earth’s
surface
Weathering
Weathering can happen two different ways: ___________________ or ______________
Physical Weathering: Rock is _______________ broken down into ___________ pieces
There are __________ types of physical weathering
1. _________________ and thawing
2. __________________ Growth
3. ____________________ Actions
4. ____________________ and impact
5. _____________________ Changes
Chemical Weathering: The process that breaks down rock through __________ changes.
There are ___________ types of chemical weathering
1. Water: Water weathers rock by ______________ it
2. Oxygen: Iron combines with oxygen in the presence of water in a processes
called ___________________
•The product of oxidation is _______________
3. Carbon Dioxide: CO2 dissolves in rain water and creates ___________ acid
•Carbonic acid easily weathers ________________ and marble
4. Living Organisms: _____________ that grow on rocks produce weak acids that
chemically weather rock
5. Acid Rain: Chemicals from burning __________, oil and gas react chemically
with water forming acids.
•Acid rain causes very _______________ chemical weathering
All this weathering can create interesting _____________________
___________________ Topography: A type of landscape in rainy regions
where there is limestone near the surface
•Created by chemical _________________ of limestone
Features of Karst: Sinkholes, _______________, and disappearing
streams
Erosion
Erosion ___________________ rock particles using ___________ different methods
1. Water Erosion: _________________, streams, and runoff
2. Ice Erosion: ___________________
3. _______________ Erosion
4. Gravity: ___________________, mudslides, slump and creep
Summary
____________________ breaks down rocks
–It can be physical (ice, plants, animals, friction, temperature change) or chemical (water,
oxidation, acid rain, carbon dioxide, living organisms)
_____________________ moves the rocks
Together they produce ____________________
Soil
•
Soil is made from _______________, minerals (mostly sand and clay), and
___________________materials
•
Soil forms _____________ of different characteristics called ______________