Soil & Weathering. The breakdown of materials of Earth’s crust into smaller pieces....

Soil & Weathering

The breakdown of materials of Earth’s crust into smaller pieces.

Weathering

Mechanical Weathering

Process by which rocks are broken down into smaller pieces by external conditions.

Types of Physical weathering Frost wedging Plant roots Friction and impact Burrowing of animals Temperature changes

Frost Wedging

Plant Roots

Friction and Repeated Impact

Burrowing of Animals

Temperature Changes

Questions

Chemical Weathering

The process that breaks down rock through chemical changes.

The agents of chemical weathering Water Oxygen Carbon dioxide Living organisms Acid rain

Water weathers rock by dissolving it

Oxygen Iron combines with

oxygen in the presence of water in a processes called oxidation

The product of oxidation is rust

Carbon Dioxide

CO2 dissolves in rain water and creates carbonic acid

Carbonic acid easily weathers limestone and marble

Living Organisms

Lichens that grow on rocks produce weak acids that chemically weather rock

Acid Rain Compounds from burning coal, oil and gas

react chemically with water forming acids. Acid rain causes very rapid chemical

weathering Acid rain has the same ph level as tomato

What is soil? Loose mixture of

weathered rock, organic matter, water, and air

Is chemically and physically different from parent material

Soil Horizon

Soils have distinct zones that roughly parallel land surface

Horizon Layers Typical soil profile

O horizon -- dark organic matter

A horizon -- contains some organic matter but many minerals are removed from this layer; Lighter-colored than O

B horizon -- contains decomposed rock such as clay, iron oxides, calcite; may be red, yellow, or tan

C horizon -- slightly altered parent material

Soil Horizons in Archaeology

Ashland, home of Henry Clay

Soil Horizon

Can you see the layers?

Monticello, VA

Can you figure out the layers?Which is horizon O, A, B, & C?

Erosion

The process by which water, ice, wind or gravity moves fragments of rock and soil.

Water Erosion

Rivers, streams, and runoff

Ice Erosion

Glaciers

Wind Erosion

Mass Movements

Landslides, mudslides, slump and creep

landslide clip.mpeg

POP QUIZ TIME!!

You may use your notes

POP QUIZ TIME!!

What is mechanical weathering?

POP QUIZ TIME!!

1 What are the two types of weathering?

POP QUIZ TIME!!

2 Acid rain is which type of weathering?

POP QUIZ TIME!!

3 Iron combines with what 2 things to form rust?

POP QUIZ TIME!!

3 Iron combines with what 2 things to form rust?

4 Frost wedging & animal burrowing are which type of weathering?

POP QUIZ TIME!!

1. What are the two types of weathering?

2. Acid rain is which type of weathering?3. Iron combines with what 2 things to

form rust?4. Frost wedging & animal burrowing are

which type of weathering?5. Which horizon has dark, organic

matter?

POP QUIZ TIME!!1. What are the two types of weathering?

1. mechanical & chemical

2. Acid rain is which type of weathering?1. chemical weathering

3. Iron combines with what 2 things to form rust?

1. oxygen & water

4. Frost wedging & animal burrowing are which type of weathering?

1. mechanical

5. Which horizon has dark, organic matter?1. Horizon O

Soil & Weathering. The breakdown of materials of Earth’s crust into smaller pieces....

Documents

Weathering and Erosion. Weathering The breakdown do the materials of Earths crust into smaller pieces

Weathering, Erosion, and Soils. What is weathering? Weathering is the physical or chemical breakdown of rock into smaller pieces Two types of weathering:

Weathering The breakdown of the materials of Earth’s crust into smaller pieces. It can happen through physical or chemical means and through natural and

WEATHERING AND EROSION Rock Cycle WEATHERING I. Weathering - The breakdown of rock due to exposure to the atmosphere, weather, plants, and animals

Weathering, Erosion, and Deposition. Weathering The breakdown of Earth’s crust into smaller pieces. The chemical and physical processes that break down

Weathering, Erosion and Deposition. Weathering The breakdown do the materials of Earth’s crust into smaller pieces

Surface Processes and Landscapes Weathering. Weathering and Erosion Weathering Weathering is the chemical and physical breakdown of rocks into smaller

The Dynamic Crust Chapter 4. Crust crustThe crust is the solid outer rock zone of Earth. crust –The crust is undergoing constant change. –Weathering and

Weathering and Erosion. Weathering The breakdown of the materials of Earth’s crust into smaller pieces

Weathering - the breakdown of rock and minerals. Erosion - the movement of these weathered materials. Physical weathering - the breakdown of rock and minerals

Regents Earth Science –Unit 9: Weathering, Erosion, and ...€¦ · Regents Earth Science –Unit 9: Weathering, Erosion, and Deposition Weathering Weathering-the breakdown of rocks

Weathering. Definition Weathering is the breakdown of materials of the Earths crust into smaller pieces. (sediment) No movement is involved. Surface or

Weathering The Breakdown of Rocks. What is Weathering? The physical breakdown (disintegration) and chemical alteration (decomposition) of rocks 2 types

Weathering and Erosion. Weathering Breakdown of rock at or near the earth’s surface 2 types of weathering – –Mechanical – –Chemical

Aim: Weathering and Erosion. Weathering The breakdown of the materials of Earth’s crust into smaller pieces

Weathering. What is weathering? Weathering is the breakdown and alteration of rocks and minerals near or at the Earth’s surface. The two types of weathering

Weathering and Erosion NOTES. Weathering The breakdown do the materials of Earth’s crust into smaller pieces

Weathering – the physical & chemical breakdown of rocks. Atmosphere (gas)

Weathering and Soil Formation Chapter 10. Weathering Weathering is simply the breakdown of rock into smaller and smaller pieces called sediment. Rocks

Weathering Physical/ Mechanical Weathering The breakdown of the materials of Earth’s crust into smaller pieces. Process by which rocks are broken down