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Flashcards in Mechanical Weathering Deck (33)
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1

Is erosion a process?

Yes

2

Is weathering a process?

Yes

3

weathering is the breakdown of _____ by physical or chemical means

rock

4

weathering is the breakdown of rock by _____ or ______ means

physical, chemical

5

what is weathering?

the breakdown of rock

6

What is the product of weathering?

Soil

7

where does weathering happen?

At or near the Earth's surface

8

For weathering to happen there must be an exposure of rock to what three things?

air, moisture, or living things

9

what is erosion?

The transport of weathered material

10

The transport of weathered material is called...

erosion

11

What are the two broad categories of weathering?

mechanical weathering and chemical weathering

12

Mechanical weathering is a ______ process

physical

13

Does mechanical weathering involve any chemical change?

No, the minerals stay the same

14

What is mechanical weathering?

the physical breakdown of rock into smaller and smaller pieces

15

Where is mechanical weathering prominent?

In dry and cool environments

16

Chemical weathering involves ______ processes

chemical

17

Can chemical weathering change the minerals in a rock?

yes

18

Where does chemical weathering occur?

it proceeds most rapidly in wet and hot environments

19

______ and _____ weathering often work/occur together to breakdown a rock

chemical, mechanical

it is often difficult to separate their effects

20

______ weathering is the breakdown of rock through physical processes like stress and strain

mechanical

21

What are joints in a rock?

cracks in a rock

22

The more cracks in a rock the more susceptible it is to be broken down by ______ weathering

mechanical

23

What is the relationship between the amount of joints in a rock and weathering?

the more joints the more susceptible it is to be broken down by mechanical weathering

24

Tectonic squeezing and twisting causes ______ to form in a rock underground

joints

25

when water freezes it ______

expands

26

What is freeze-thaw action?

When water freezes in the crack of rock it expands and breaks open the crack more

27

Can roots and burrowing animals cause weathering?

Yes, they can cause cracks to expand and in effect break the rock apart

28

what is salt crystal growth?

Salt water gets into the joints of a rock, water evaporates, and salt is left behind, crystal growth exerts force . Also, some salt expands when heated

29

_______ is the process by which little particles are blown against the surfaces of rocks causing the surfaces to become smooth.

abrasion

30

what is abrasion?

When little particles are blown against the surfaces of rocks causing the surfaces of the rock to become smooth.
This process is like sandpaper