L5

Question 1

Weathering, mass wasting, and denudation

Answer 1

Exogenic Process

Question 2

The elements of nature capable of doing these exogenic processes are termed as

Answer 2

Gradational Agents

Question 3

 is the process of disintegration (physical) and decomposition (chemical) of rocks.

Answer 3

Weathering

Question 4

is a process of breaking down rocks into small particles such as sand, clay, gravel and other fragments.

Answer 4

Weathering

Question 5

Is the breakdown of rocks into pieces without any change in its composition.

Answer 5

Mechanical or Physical Weathering

Question 6

Due to tectonic forces, granite may rise to form mountain range. After the granite ascends and cools, the overlying rocks and sediments may erode. At the point when the pressure diminishes, the rock expands, cools, and became brittle and fractured.

Answer 6

Pressure

Question 7

Rocks expand and are fractured when expose to high temperature. However, if the temperature drops to 0°C (freezing point of water), it also expands and causes fracture.

Answer 7

Temperature/ Frost Wedging

Question 8

The breakdown of rocks is caused by impact and friction. This primarily occurs during collision of rocks, sand, and silt due to current or waves along a stream or seashore causing sharp edges and corners to wear off and become rounded.

Answer 8

Abrasion

Question 9

Activities such as digging, quarrying, denuding forests and cultivating land contribute to physical weathering.

Answer 9

Human Activities

Question 10

The roots grow causing penetration into the crack, expand, and in the long run, break the rock.

Answer 10

Organic Activity

Question 11

Animals like rats, rabbits and squirrels excavate into the ground to create a space for habitation.

Answer 11

Burrowing Animals

Question 12

It occurs in specific minerals which are dissolved in water. Examples of these minerals are Halite (NaCl) and Calcite (CaCO3). The formation of stalactites and stalagmites in caves are brought about by this chemical reaction.

Answer 12

Dissolution

Question 13

Rock-forming minerals like amphibole, pyroxene, and feldspar react with water and form different kinds of clay minerals

Answer 13

Hydrolysis

Question 14

It is the response of oxygen with minerals. If the iron oxidizes, the mineral in rocks decomposes. Rusting is an example of this chemical reaction.

Answer 14

Oxidation

Question 15

The movement of sediments downslope under the influence of gravity

Answer 15

Mass Wasting

Question 16

is the process in which the weathered materials carried out by erosion settle down in a particular location.

Answer 16

Deposition