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Flashcards in Chemical Weathering Deck (25)
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1

In chemical weathering rocks are broken down through ______ processes

chemical

2

What is dissolution?

the dissolving of rocks

3

what is the primary agent that dissolves rocks?

acidic rain

4

Why is rain naturally acidic?

Because there is carbon dioxide in the atmosphere. When carbon dioxide combines with water, it creates carbonic acid, which is a weak acid

5

When carbon dioxide combines with water it creates _______ rain

acidic

6

what have we been polluting the air with that has made rain even more acidic?

sulfur dioxide and nitric oxides.

7

what is the primary source of sulfur dioxide?

coal burning power plants

8

When sulfur dioxide combines with water in the atmosphere it creates _____ acid

sulfuric

9

What is the primary source of nitric dioxide?

car exhausts

10

When nitric dioxide is released in the atmosphere and combines with water it creates _____ acid

nitric

11

Are nitric and sulfuric acid weak or strong acids?

strong

12

which is a stronger acid, sulfuric acid or carbonic acid?

sulfuric

13

When acidic rain hits primarily ______ and ______ it starts dissolving the rock

limestone, marble

14

what does acidic rain do to rocks?

it breaks the rock down

15

Ionic exchange converts ______ minerals to _____ minerals

hard, soft

16

Does ionic exchange facilitate all weathering processes?

Yes, once the minerals are soft it is easier for them to be broken down by any mineral process

17

Oxidation is a reaction between ______ and ______ that is dissolved in water

minerals, oxygen

18

Where does oxidation operate most often?

In iron-rich minerals

19

What are the factors affecting the rate of weathering?

- climate
- topography
- tectonic setting
-rock composition
- structure
-organic processes.
-human activity

20

The wetter and hotter the climate the more likely ______ weathering will occur

chemical

chemical weathering is the primary agent of weathering in these climates because chemical processes occur more rapidly in hot and wet climates

21

The colder and dryer the climate the more likely ______ weathering will occur

mechanical

22

Areas with steeper slopes will weather more ______

rapidly

23

Rocks that are not cracked weather more _____

slowly

24

Rocks with hard minerals such as quartz weather more _____

slowly

25

When an area is deforested by humans, more area of land is exposed to the elements, and therefore the rocks will weather more _____

rapidly