Weathering/erosion Review

Question 0

Define erosion

Answer 0

The removal of rock particles by wind water ice or gravity

Question 1

Define weathering

Answer 1

The process that breaks down rock and other substances at earths surface

Question 2

Define mechanical weathering

Answer 2

A type of weathering in which rock is physically broken into smaller pieces

Question 3

define chemical weathering

Answer 3

The process that breaks down rock through chemical changes

Question 4

Define oxidation

Answer 4

iron combines with oxygen in the presence of water creating rust this is oxidation

Question 5

Describe in a full sentence how weathering and erosion work together

Answer 5

Weathering and erosion and work together continuously to wear down and carry away the rocks at earths surface

Question 6

What are the five forces of mechanical weathering

Answer 6

Freezing and thawing
Release of pressure
Plant growth
Actions of animals
abrasion

Question 7

Describe the mechanical weathering type of freezing and thawing

Answer 7

When Water freezes in a crack in a rock it expands and makes the crack bigger

Question 8

Describe release of pressure

Answer 8

As erosion removes material from the surface of a mass of rock pressure on the rock is reduced this release of pressure causes the outside of the rock to crack and flake off

Question 9

Describe plant growth

Answer 9

Roots of trees and other plants enter cracks in rocks as roots grow they forced the cracks farther apart over time the roots of the small plants can pry apart cracked rock

Question 10

Actions of animals

Answer 10

Animals that burrow in the ground including moles gophers and prairie dogs and some insects loosen and breakapart rocks in the soil

Question 11

Describe abrasion

Answer 11

Sand and other rock particles that are carried by wind water or ice can wear away exposed rock surfaces like sandpaper on wood

Question 12

What are 5 causes of chemical weathering

Answer 12

The action of water
Oxygen ( oxidation)
Carbon dioxide 
Living organisms 
Acid rain

Question 13

Describe the action of water

Answer 13

Water weather’s rock by dissolving it

Question 14

Describe oxygen (oxidation )

Answer 14

Iron combines with oxygen and presence of water this is oxidation this causes rust which makes rock soft and crumbly and gives it a red or brown color

Question 15

Describe carbon dioxide C.W.

Answer 15

Carbon dioxide dissolves in rain water and water that sinks through air pockets in the soil this carbon acid which easily weather’s rocks such as marble and limestone

Question 16

Describe living organisms C.W.

Answer 16

When roots and plants push into cracks in rocks these routes released weak acids that dissolve rock around the roots lichens that sit on rocks also produce this acid

Question 17

Describe acid rain

Answer 17

Burning coal oil gas etc. causes air pollution full of sulfur carbon and nitrogen compounds. these compounds react chemically with water vapor forming acid this acid falls in rain and rapidly weather’s rocks

Question 18

What are two factors that determine the rate of weathering

Answer 18

Type of rock

Climate

Question 19

How does type of rock determine the rate of weathering?

Answer 19

Materials in the rock determine how fast it weathers. rock with minerals that dissolve easily in water weather slower than rocks with minerals that don’t dissolve easily

Question 20

How does climate determine the rate of weathering ?

Answer 20

Climate refers to the average weather conditions in an area both chemical and mechanical weathering occur faster and wet climates