Show:
Weathering
Mechanical Weathering
Chemical Weathering
Erosion
Misc..
100
Weather is the __________ of rocks.
What is breakdown?
100

Define mechanical weathering

-Break down into smaller
pieces
-Do not change the
chemical composition,
only size of sediments


100
Chemical weathering is the process by which rock is broken down due to chemical interactions in the _________.
What is environment?
100
Erosion is the process by which rock is ______.
What is transported?
100

What are 2 erosional forces

• Running water
• Glacial erosion
• Wind
• Gravity
• Living organisms


200
Physical breakdown of rocks.
What is mechanical weathering?
200
Weathering in which rocks peel off as sheets.
What is exfoliation?
200
Chemical weathering that occurs when rock elements combine with oxygen.
What is oxidation?
200
The process by which sediments, soil and rocks are added to a landform or land mass
What is deposition?
200

Gravity pulls material _______

downslope

300
Breakdown of rocks through chemical means.
What is chemical weathering?
300
When water seeps into cracks in the rock and freezes, causing rocks to break.
What is ice wedging?
300
Chemical weathering that occurs when minerals in rock chemically combine with water.
What is hydrolysis?
300

How does water cause erosion?

Water causes erosion by carrying away soil and rock particles in rivers, rain runoff, or ocean waves

300
River erosion occurs when the water is the ________.
What is fastest?
400
Another term for chemical weathering.
What is decomposition?
400
The collision of rocks resulting in breaking.
What is abrasion?
400
Natural rainwater that contains a high amount of acid.
What is acid precipitation?
400

Describe how glaciers cause erosion as they move.

Glaciers erode land by scraping and grinding rocks beneath them as they move slowly downhill.

400
Deposition occurs in the river when water is the _______.
What is slowest?
500
Two main factors that can result in weathering.
What is temperature change, pressure change, wind, rain ect.?
500

Explain some methods under mechanical weathering

Temperature changes can cause rocks
to break apart
 Frost wedging- freeze/thaw cycle causes
rock to break along weakest point
 pot holes
• Pressure that is increased/decreased
can cause rocks to crack
 Exfoliation
 Biological- tree root

500
Chemical weathering that causes rock to turn red in color.
What is oxidation?
500

How does vegetation help prevent erosion

Vegetation holds soil in place with roots

500
Glacial erosion can also cause weathering by scraping rocks against each other. This is a form of mechanical weathering called _________.
What is abrasion?