Weathering

Question 1

Types of weathering

Answer 1

1. Physical Weathering
2. Chemical Weathering
3. Biological Weathering

Question 2

Agent of weathering. During thermal stress, rock expands with heat and contract when it’s called. As this happens repeatedly, the structure of rocks weaken and over time crumbles.

Answer 2

Temperature

Question 3

Agent of weathering that create cracks or pores of rock.

Answer 3

Salt

Question 4

Agent of weathering. When seed of a tree were collected in a cracked rock, it will then grow overtime and spread out causing rocks to break.

Answer 4

Plants

Question 5

Caused by water, wind, and gravity

Answer 5

Abrasion

Question 6

it is a process where salt served as an agent of weathering. When saltwater enter the rocks, the water will evaporate leaving the salt crystals that causes cracks and pores

Answer 6

Haloclasty

Question 7

Process of breakdown of rocks at the earth’s surface

Answer 7

Weathering

Question 8

Some plants and animals also produced acidic substances that react with the rock and cause its slow disintegration

Answer 8

Biological Weathering by Chemical Compounds

Question 9

Caused by rainwater reacting with mineral grains in rocks to form new minerals (clays) and soluble salts.

Answer 9

Chemical weathering

Question 10

occurs when rocks are weakened by different biological agents like plants and animals. When plant roots grow through rocks, it creates fracture and cracks that result eventually to rock breakage.

Answer 10

Biological Weathering

Question 11

It is caused by thee effects of changing temperatures on rocks, causing it to fall apart. This process is sometimes assisted by water.

Answer 11

Physical Weathering

Question 12

Breakdown of rock by oxygen and water

Answer 12

oxidation

Question 13

Three types of weathering.

Answer 13

Physical, Chemical, and Biological weathering.

Question 14

In liquid form, it seeped into cracks and crevices of rocks. When the temperature dropped, it freezes and expand to form ice.

Answer 14

Water

Question 15

Occurs when water continually seeped into cracks, freezes and expands, eventually breaking the rock apart.

Answer 15

Freeze-thaw

Question 16

Difference between Erosion and Weathering

Answer 16

Weathering- Disintegration of rocks.
Erosion- Movement of sediments,

Question 17

Water reactqs chemically with the rocks, modifying its chemical structure

Answer 17

Hydration

Question 18

An agent of mechanical weathering that is either liquid or solid.

Answer 18

Water

Question 19

breakdown of rock by acidic water to produce clay or soluble salts.

Answer 19

Hydrolysis

Question 20

These reaction occur particularly when the water is slightly acidic.

Answer 20

Chemical Weathering

Question 21

occurs as cracks developed parallel to the land surface as a consequence of the reduction in pressure during uplift and erosion.

Answer 21

Exfoliation

Question 22

Agents of Weathering

Answer 22

Water, Salt, Temperature, Plants, Animals

Question 23

CO2 dissolves with rainwater which can react with basic minerals

Answer 23

Carbonation

Question 24

Burrowing animals like moles which create holes on the ground by excavation and move the rock fragments.

Answer 24

Biological Weathering by Physical Means