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Questions and Answers
What is the principal agent behind both physical and chemical weathering?
What is the principal agent behind both physical and chemical weathering?
- Biological organisms
- Water (correct)
- Atmospheric oxygen
- Sunlight
Which process involves the transport of rocks and minerals by agents such as water, ice, snow, wind, waves, and gravity?
Which process involves the transport of rocks and minerals by agents such as water, ice, snow, wind, waves, and gravity?
- Biological weathering
- Physical weathering
- Erosion (correct)
- Chemical weathering
What type of weathering involves the breakdown of rocks and soils through the mechanical effects of heat, water, ice, or other agents?
What type of weathering involves the breakdown of rocks and soils through the mechanical effects of heat, water, ice, or other agents?
- Biological weathering
- Physical weathering (correct)
- Chemical weathering
- Erosion
What is the result of weathering processes combined with erosion and re-deposition?
What is the result of weathering processes combined with erosion and re-deposition?
What covers 66% of the Earth's continents and much of its ocean floor, formed from the weathering products of older rock?
What covers 66% of the Earth's continents and much of its ocean floor, formed from the weathering products of older rock?
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Study Notes
Weathering Processes
- Water is the principal agent responsible for both physical and chemical weathering.
- Physical weathering occurs through the mechanical effects of heat, water, ice, and other natural agents, breaking down rocks and soils without altering their chemical composition.
- Chemical weathering involves changes in the minerals within rocks, leading to dissolution or alteration due to chemical reactions.
Erosion and Transportation
- Erosion is the process that involves the transport of rocks and minerals by agents like water, ice, snow, wind, waves, and gravity.
- This transport contributes to the reshaping of landscapes by moving materials from one location to another.
Weathering Outcomes
- The combination of weathering processes, erosion, and re-deposition results in sediment formation, which contributes to the development of new geological features.
Sedimentary Cover
- Sediment covers approximately 66% of the Earth's continents and vast areas of the ocean floor.
- This sediment is formed from the weathering products of older rocks, leading to the creation of different types of sedimentary layers.
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