Unit 8B

Question 0

Physical weathering AKA mechanical weathering

Answer 0

Breakdown of rock into smaller pieces by physical changes

Question 1

Weathering

Answer 1

Process of breaking down rocks into tiny particles called sediments

Question 2

Ice wedging or frost wedging

Answer 2

When water expands as it freezes in cracks and then thaws

Question 3

Temperature changes

Answer 3

When rocks are heated by day and cooled by night

Question 4

Root wedging

Answer 4

When roots of plants break up the earth

Question 5

Exfoliation

Answer 5

When outer surface of rock peals due to pressure

Question 6

Abrasion

Answer 6

Grinding and wearing down of rock by other rock or sand particles

Question 7

Chemical weathering

Answer 7

The chemical breakdown of rocks and minerals into new substances

Question 8

Water

Answer 8

Dissolves rocks in 1000s of years

Question 9

Acid precipitation

Answer 9

High acid contents in rain,sleet,or snow as a result of burning fossil fuels

Question 10

Human activities

Answer 10

Burning of fossil fuels, produces sulfur,carbon and nitrogen oxides which fall back into ground as rain/snow

Question 11

Oxidation

Answer 11

Iron and oxygen form rust

Question 12

Differential weathering

Answer 12

Softer, less weather resistant rocks wear away leaving behind harder more resistant rocks

Question 13

Climate

Answer 13

Oxidation happens more often in warm, humid climates

Question 14

Elevation

Answer 14

There is more exposure to wind, rain, and ice at higher elevations

Question 15

What does WED stand for

Answer 15

Weathering, erosion, deposition

Question 16

Erosion

Answer 16

The process of moving sediment from one place to another

Question 17

Deposition

Answer 17

The process of dropping or depositing eroded materials/sediment in new locations

Question 18

Delta

Answer 18

Deposition occurs when water slows down and materials are deposited along the stream/River bank,bed,or at the mouth forming a delta

Question 19

Alluvial fan

Answer 19

Forms as a fan shaped deposit on dryland

Question 20

Gradient

Answer 20

The measure of change in elevation over a certain distance

Question 21

Load

Answer 21

Materials carried by the stream

Question 22

Dunes of generally move in the same direction that the

Answer 22

When the wind is blowing,so a dunes slope side faces the wind

Question 23

Ecoregion

Answer 23

An ecosystem that covers a large area where the climate, organisms,and the soil are similar

Question 24

Natural resource

Answer 24

A material on earth that is necessary or useful to people

Question 25

Soil conservation

Answer 25

The way that people take care of soil

Question 26

Cover crops

Answer 26

Planet between harvest to reduce soil erosion and to replace certain nutrients in the soil

Question 27

Crop rotation

Answer 27

The process of changing crops from year-to-year

Question 28

Leaching

Answer 28

When organic matter is removed from a soil horizon