topic: factors affecting weathering rate. 1) -- 2) particle size – --

Topic: Factors Affecting Weathering Rate

1) --

2) Particle Size – --

Granite LimestoneAn 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.

Egypt NYC

5) Climate influences weathering

--

Long Island Rainfall: 117.1 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

A. 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 SoilA. 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?

--