Weathering

Question 1

What is weathering?

Answer 1

It is the on-site breakdown of rock and its eventual transformation into sediments

Question 2

What is mechanical weathering?

Answer 2

It is the physical breakdown of rock into unconnected grains/chunks w/o changing its composition

Question 3

Types of mechanical weathering

Answer 3

1. Exfoliation (pressure released)
2. Frost wedging
3. Root wedging
4. Salt wedging
5. Thermal expansion
6. Burrowing animals
7. Human activities

Question 4

Exfoliation

Answer 4

*pressure pressure idk do this later

Question 5

Frost wedging

Answer 5

-

Question 6

Root wedging

Answer 6

-

Question 7

Salt wedging

Answer 7

-

Question 8

Thermal expansion

Answer 8

-

Question 9

Burrowing animals

Answer 9

-

Question 10

Human activities

Answer 10

-

Question 11

What is chemical weathering?

Answer 11

Occurs when there are chemical changes in at least some of the composition of the rock

Question 12

Types of chemical weathering

Answer 12

1. Dissolution
2. Hydrolysis
3. Oxidation
4. Hydration
5. Biological Weathering

Question 13

Dissolution

Answer 13

Slightly acidic solutions weather the rocks and form pits and holes

Question 14

Hydrolysis

Answer 14

water REACTS with minerals and breaks it down

Question 16

Oxidation

Answer 16

Forms oxides when oxygen reacts with minerals in the rock

Question 17

This process expands certain types of clay where water is ABSORBED into the crystal structure of a mineral

Answer 17

Hydration

Question 18

What organisms are involved in biological weathering that secrete organic acids to dissolve minerals?

Answer 18

Fungi and Lichen

Question 19

Compare the rate of which soft rocks and hard rocks weather

Answer 19

Soft rocks weather faster than hard rocks

Question 20

What are the factors affecting erosion?

Answer 20

gravity and transporting agents like wind, ice, water

Question 21

The process of separation and removal of weathered and unweathered rocks and soil

Answer 21

Erosion

Question 22

Where does wind erosion commonly occur?

Answer 22

flat, bare areas or dry, sandy, loose soil

Question 23

A phenomenon that transports sediments, usually occurring in deserts

Answer 23

Sandstorm

Question 25

Explain the process of wind erosion

Answer 25

It involves the detaching of soil particles which are then transported by wind

Question 26

Give 3 examples of the negative effects brought by wind erosion

Answer 26

soil loss, dryness, deterioration of soil structure, soil nutrient and productivity loss, air pollution

Question 27

Explain the process of abrasion or give the keyword

Question 28

Explain the process of plucking or give the keyword

Question 28

Explain the process of scouring or give the keyword associated to it

Question 29

Explain the process of dissolution or give the keyword associated to it

Question 30

What is yielded in the process of dissolution?

Answer 30

carbonic acid

Question 31

A permanent body of ice the consists of recrystalized snow

Answer 31

Glacier

Question 32

Describe the erosive power of glaciers

Answer 32

enormous