Topic: Factors Affecting Weathering Rate

1) --

2) Particle Size – --

GraniteLimestone An obvious example of how weathering differs with different mineral solubilities Different Compositions

3. Different Composition – -- Ex) Quartz very resistant!

The presidential faces on Mount Rushmore are carved into chemically resistant granite.

4) Pollution rate increases - --

How does climate affect weathering rates? Cleopatra's Needle, inscribed Egyptian hieroglyphs is 3000 years old. Was moved to NYC in the 1880’s. EgyptNYC

5) Climate influences weathering -- Long Island Rainfall: cm (46 inches) Temperature: 10.7°C (51.2°F)

a)Physical weathering: -- b) Chemical weathering: --

FQ: What effect does increased surface area have on weathering rate? --

Topic: Products of Weathering

A.Sediments – -- –Sediment sizes Boulders-> Cobble-> Pebbles -> Sand-> Silt-> Clay Sizes pg 6 ESRT Products of Weathering

Sediment Size ESRT Pg.6

B. -- Ex) Salty water.

C.Soil -- Parent Rock --

The #1 factor in soil development is ---

Types of Soil A.Residual Soil - --

B. Transported Soil – -- *Most soil is transported. Glacial Loess

Soil Formation

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.

Humus – --

* ---

Soil mixed by: Shrinking & swelling due to water content changes Freezing & thawing

Final Question: What do we call decayed plant and animal matter? --