Weathering and Erosion

Question 1

2 Main Types of Weathering

Answer 1

Chemical and Mechanical/Physical

Question 2

Weathering

Answer 2

the process of breaking down rock on Earth’s surface.
Examples: heat , cold, water, ice

Question 3

Mechanical Weathering

Answer 3

A rock is physically broken into smaller pieces without altering the chemical composition of the rock

Question 4

Ice Wedging

Answer 4

Water wedges in rocks, freeze and widen deepening the cracks of rocks
This is how potholes form!

Question 5

Abrasion

Answer 5

Refers to the grinding away by rock particles carried by water, ice, wind or gravity

Question 6

Organic Weathering

Answer 6

burrowing animals loosen and break apart rocks in the soil
roots of trees and plants enter cracks in rocks and force them farther apart

Question 7

Chemical Weathering

Answer 7

The process that breaks down rock through chemical changes that alter the mineral composition of the rock

Question 8

Oxidation

Answer 8

Iron in rocks react chemically with oxygen forming iron oxide (rust) causing the rock to become soft, crumbly and red or brown color
Copper reacts to oxygen, turning greenish in color

Question 9

Hydrolysis

Answer 9

Water reacts chemically with minerals in the rock during hydrolysis

Question 10

Carbonation

Answer 10

Carbon dioxide from the air reacts with water to form carbonic acid, speeding up hydrolysis that converts some minerals into carbonates.

Question 11

What determines the rate of weathering?

Answer 11

2 Most Important Factors:

Type of rock
Climate

Question 12

Human Activities that cause weathering

Answer 12

Mining
Construction
Recreational activities