topic: factors affecting weathering rate. 1) -- 2) particle size – --
TRANSCRIPT
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Topic: Factors Affecting Weathering Rate
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1) --
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2) Particle Size – --
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Granite LimestoneAn obvious example of how weathering differs with different mineral solubilities
Different Compositions
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3. Different Composition – --Ex) Quartz very resistant!
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The presidential faces on Mount Rushmore are carved into chemically resistant granite.
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4) Pollution rate increases - --
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How does climate affect weathering rates?
Cleopatra's Needle, inscribed Egyptian hieroglyphs is 3000 years old. Was moved to NYC in the 1880’s.
Egypt NYC
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5) Climate influences weathering
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Long Island Rainfall: 117.1 cm (46 inches)Temperature: 10.7°C (51.2°F)
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a) Physical weathering: --b) Chemical weathering: --
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FQ:
What effect does increased surface area have on weathering rate?
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Topic: Products of Weathering
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A. Sediments – --
– Sediment sizes
A. Boulders-> Cobble-> Pebbles -> Sand-> Silt-> Clay
Sizes pg 6 ESRT
Products of Weathering
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Sediment Size ESRT Pg.6
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B. --Ex) Salty water.
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C.Soil
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Parent Rock
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The #1 factor in soil development is ---
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Types of SoilA. Residual Soil - --
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B. Transported Soil – --*Most soil is transported.
•Glacial Loess
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Soil Formation
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•O Horizon – The top, organic layer of soil, made up mostly of leaf litter and humus (decomposed organic matter)
•A Horizon – The topsoil, Seeds germinate and plant roots grow in this dark-colored layer. It is made up of humus (decomposed organic matter) mixed with mineral particles.
•B Horizon – The subsoil, It contains clay and mineral deposits that it receives from layers above it when water drips from the soil above.
•C Horizon – Partially weathered bedrock, It consists of slightly broken-up bedrock. Plant roots do not penetrate into this layer; very little organic material is found in this layer.
Soil Horizons
•D Horizon – Bedrock, solid rock.
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Humus – --
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Soil mixed by:
• Shrinking & swelling due to water content changes
• Freezing & thawing
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Final Question:
• What do we call decayed plant and animal matter?
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