Mechanical Weathering
What is mechanical weathering?
Mechanical weathering is the type of weathering in which rock is physically broken into smaller pieces.
What is chemical weathering?
Chemical weathering is the process that breaks down rock through chemical changes.
How do waves play a role in weathering?
Crash into rocks (erodes), deposit sand and sediment
what is weathering?
Weathering is the process that breaks down rock and other substances.
True or false: Lakes are a part of the biosphere.
TRUE
What are two examples of Mechanical Weathering?
Plant growth, abrasion, ice wedging, etc.
What is an example of Chemical Weathering?
Rust, animal acids, acid precipitation, etc.
One example of a landform created by deposition?
Beaches, floodplains, alluvial fan, etc.
Where is groundwater and how does it erode?
Underground
Water = acid, acid = breakdown of rock
Compare and contrast hydrosphere and cryosphere
water
liquid vs solid
How does ice wedging break a rock?
When ice melts, water seeps in deeper into the cracks, and freezes again. With repeated freezing and thawing the cracks in a rock expand slowly and then the rock breaks off.
What is oxidation?
Oxidation is when oxygen mixes with iron in the presence of water.
What three factors relate to a stream's ability to erode material?
Gradient, load, discharge
What are the two things that affect the rate of weathering?
The two things that effect the rate of weathering is the type of rock and climate.
Thinnest part of geosphere?
Crust
How does plant growth break a rock?
the plant root enter cracks in the rock. As the roots grow, they force the cracks apart. Overtime the roots of the plant can pry open the cracks of the rock.
What is acid precipitation?
When chemicals combine with rain.
Compare: made by deposition
Contrast: site was originally water for a delta and land for a fan
Weathering is the movement of broken down rock. True or False?
False! Weathering breaks down rock but erosion is the movement of rock.
nitrogen, oxygen, and other gases
What is Abrasion?
Abrasion refers to the wearing away of rock by rock particles carried by wind, water, ice, or gravity.
Chemical weathering changes what two things about rocks?
Composition and apprearance
What coastal landform feature would take the longest to make?
Sea stacks! Totally separated from everything
How is weathering different from erosion?
Erosion wears down and carries away rocks, while weathering breaks down the rock.
Give an example of earth's spheres interacting.
Answers vary