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Earth And Life Sciences > Lecture 4 : Exogenic Processes > Flashcards

Lecture 4 : Exogenic Processes Flashcards

1
Q

The outer layer of rocks subsequently peel off from its main mass due to excessive expansion and contraction.

A

Thermal and Pressure Change

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2
Q

Which of the following rocks in cave hangs on the ceiling?

a. Stalactites
b. Stalagmites
c. Limestone
d. Granite

A

a. Stalactites

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3
Q

Which of the following is not an agent of weathering?

a. Sand and Gravel
b. Hydration
c. Frost Action
d. Animals

A

a. Sand and Gravel

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4
Q

Which of the following is not an example of Exogenic Process?

a. Weathering
b. Metamorphism
c. Erosion
d. Mass Wasting

A

b. Metamorphism

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5
Q

Which of the following is best describes weathering?

a. A mechanical and chemical hammer that sculpts and breaks down rocks
b. A process of forming and aligning rocks
c. A mechanical and chemical process of transferring sediments and rocks
d. A formation and solidification of magma to generate rocks

A

a. A mechanical and chemical hammer that sculpts and breaks down rocks

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6
Q

Which of the following types of chemical weathering causes by too much amount of acidic rain fall that result for the rock to weather?

a. Hydration
b. Carbonation
c. Oxidation
d. Hydrolysis

A

b. Carbonation

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7
Q

Which of the following is the abrupt movement of and free fall of loosened solid rock?

a. Rock Falls
b. Avalanche
c. Landslide
d. Slump

A

a. Rock Falls

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8
Q

Which of the following best describes Mudslides?

a. A rapidly moving earth flow containing higher water content
b. A fast moving earthflow in a mountainous region
c. A sinking mass movement that occurs relatively rapid fashion
d. A sinking mass wasting in gradual movement

A

a. A rapidly moving earth flow containing higher water content

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9
Q

Which of the following involves the movement of weathered rocks from their site of weathering by different agents?

a. Mass movement
b. Weathering
c. Faulting
d. Erosion

A

d. Erosion

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10
Q

Which of the following happens whenever rocks are broken up without any changes in their chemical composition?

a. Physical Weathering
b. Chemical Weathering
c. Biological Weathering
d. All of the above

A

a. Physical Weathering

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11
Q

The physical breakdown and/or chemical alteration of rocks at or near the Earth’s surface is referred to as ?

A

weathering

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12
Q

It is the mechanical and chemical hammer that breaks down and sculpts the rock

A

Weathering

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13
Q

What are the two kinds of weathering?

A

Physical and Chemical

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14
Q

These are external processes that occur at/or near the surface of Earth. These are part of the rock cycle and responsible for transforming rock into sediment

A

Exogenic Process

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15
Q

It is the decomposition of rocks due to chemical reactions occurring between the minerals in rocks and the environment.

A

Chemical Weathering

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16
Q

Chemical weathering transforms rocks and minerals exposed to water and agses in the tmosphere into new chemical compound thus, forming different rocks and minerals

true or false

A

true

17
Q

What are the processes that can cause physical weathering?

A

1. Thermal and Pressure Change
2. Wind and Waves
3. Freeze Thaws
4. Organic Acitivity

18
Q

It refers to the breakdown of rocks wthout a change in its composition.

A

Mechanical/Physical weathering

19
Q

When a rock gets hot, it expands, while at ngiht , the rock gets cold causing contraction..

true or false

A

true

20
Q

This would mean that the rock is fractured, cracked or fragmented into smaller pieces

A

Breakdown

21
Q

It is when rocks crumble and break into fragments because they are subjected to alaternating hot and cold temeprature many times

A

Thermal and Pressure Change

22
Q

Repeated swings in temperature weaken the rock and in the process, mineral grains loosened fromt he rocks and eventually the rocks break down into pieces

true or false

A

true

23
Q

It can all cause physical weathering. Tiny grains of sand are picked up and carried off by the wind, which are then blasted on the surface of rocks, smoothening them. This could wear away the rocks and weather it

A

Wind and Waves

24
Q

This happens particularly in cold climate. The freeezing creates cracks.

A

Freeze and Thaw

25
Q

On the seashore, the action of wave chips away and cracks the rocks.

true or false

A

true

26
Q

Animals and plants also take a heavy toll on rocks and causes them to wear away. It could be an animal like rabbit that burrows into a crack in the rocks as it constantly burrows and makes the cracks bigger, it ends up ripping the rocks apart.

A

Organic Activity

27
Q

What are the process that can cause chemical weathering?

A

1. Hydration
2. Carbonation
3. Oxidation

28
Q

It is another kind of chemical weathering process that occurs when oxygen, considered as an active gas, combines with another substances like minerals in rocks, yielding compound called oxides.

A

Oxidation

29
Q

Water is nature’s versatile tool that can bring about chemical weathering. Molecules of some substance in rocks chemically combine with water molecules. This process is called ?

A

Hydration

30
Q

It is when carbon dioxied may bond with other substances in a process known as ?

A

carbonation

31
Q

involves the movement of the weathered rock from their site of weathering by agents of erosion such as wind, moving water, ice and gravity.

A

Erosion

32
Q

Water can carry almost any size of any rocks. The greater the volume of water and the steeper the slope, the bigger and more rocks can be transported.

A

Transport by Water

33
Q

Transport makes erosion complete because it involves the mvoement of the eroded materials and sediments

true or false

A

true

34
Q

Weathering does nto always occur before erosion. Erosion always follow after the weathering.

true or false

A

true

35
Q

Wind contionously blows away loose paricles of rocks and soil from place to place. This is common in dry areas such as deserts.

A

Transport by Wind

36
Q
A

Earth And Life Sciences (5 decks)

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