Weathering, Erosion And Deposition

Question 1

What is mechanical weathering?

Answer 1

The process that breaks down rocks and other substances at earths surface.

Question 2

Example of mechanical weathering?

Answer 2

Breaking down of ricks into smaller pieces by forces of nature

Question 3

What is freezing and thawing?

Answer 3

When water seeps into cracks of rocks then freezes when temperatures drop causing the cracks in the rocks to widen

Question 4

What is unloading?

Answer 4

Occurs when overlying material such as soil or rocks is removed and confining pressure on the underlying rock is decreased

Question 5

What is root wedging?

Answer 5

When tree roots wedge their way into cracks of rocks and over time slowly break the rock apart

Question 6

Actions of animals?

Answer 6

Animals breaking down rocks by digging, tunneling, and scratching

Question 7

What is abrasion?

Answer 7

The grinding away of rock by rock particles carried by water, ice, wind or gravity

Question 8

What is chemical weathering?

Answer 8

The process that breaks down rocks through chemical changes

Question 9

What is hydrolysis?

Answer 9

Chemical weathering occurs when water dissolves minerals in a rock

Question 10

What is oxidation?

Answer 10

Happens when oxygen changes the color of the rocks while making the rock more fragile and easier to break.

Question 11

What is carbonation?

Answer 11

Happens when carbon dioxide combines with water to form carbonic acid

Question 12

What are living organisms?

Answer 12

Plans and animals interact with rocks and minerals to cause them to break down by using chemicals

Question 13

What is acid rain?

Answer 13

Happens when any form of precipitation with acidic components like sulfuric or nitric acid falls to the ground from the atmosphere and dissolve rocks

Question 14

What causes acid rain?

Answer 14

When gases from power stations, factories and cars mix with water it forms acid rain

Question 15

What are the affects of acid rain?

Answer 15

Can cause rivers and lakes to become acidic killing those organisms

Question 16

What is erosion?

Answer 16

The process of sediments being moved by wind, water, ice or gravity to a new location

Question 17

What is wind erosion?

Answer 17

Typically the weakest type of erosion. Where wind removes surface materials

Question 18

What is water erosion?

Answer 18

Water is the biggest agent of erosion. Occurs in rivers or streams. Water erosion begins as run off

Question 19

What is glacial erosion?

Answer 19

Typically occurs because sediment is deposited when the glacier melts or retreats backwards

Question 20

What is deposition?

Answer 20

The process by which sediment settles out of the water or wind that is carrying it and is deposited in a new location

Question 21

What are factors that affect deposition?

Answer 21

Particle size, shape, density and settling rates

Question 22

What are ways sediment can be deposited?

Answer 22

Glaciers, water, wind and gravity

Question 23

What is water deposition?

Answer 23

When sediments build up at the mouth of rivers a delta is formed. When water flows down rocks and carries sediments away

Question 24

What is wind deposition?

Answer 24

Occurs when smaller pieces of sediment carried by the wind eventually falls to the ground. It can form sand dunes