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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?
- Sunlight
- Biological organisms
- Atmospheric oxygen
- Water (correct)
Which type of weathering involves the breakdown of rocks through mechanical effects?
Which type of weathering involves the breakdown of rocks through mechanical effects?
- Biological weathering
- Physical weathering (correct)
- Erosional weathering
- Chemical weathering
What distinguishes weathering from erosion?
What distinguishes weathering from erosion?
- Chemical reactions with rocks and soils
- Transport of rocks and minerals
- In situ deterioration (correct)
- Formation of sedimentary rock
What is the primary component in the formation of soil after rock breaks down?
What is the primary component in the formation of soil after rock breaks down?
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What covers a significant portion of the Earth's continents and ocean floor, formed from weathering products of older rock?
What covers a significant portion of the Earth's continents and ocean floor, formed from weathering products of older rock?
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Study Notes
Weathering and Soil Formation
- Water is the principal agent behind both physical and chemical weathering.
Types of Weathering
- Mechanical weathering, also known as physical weathering, involves the breakdown of rocks through mechanical effects.
Weathering vs. Erosion
- Weathering involves the breakdown of rocks in place, whereas erosion involves the transportation of rocks and sediments away from their original location.
Soil Formation
- Organic matter is the primary component in the formation of soil after rock breaks down.
Sedimentary Deposits
- Sedimentary rocks, formed from weathering products of older rock, cover a significant portion of the Earth's continents and ocean floor.
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