Weathering Notes

1
Weathering Notes

• Label your notes Weathering
• Write Mechanical and leave 5 lines
• Write Chemical and leave 5 lines

2
Mechanical Weathering

• Freezing and Thawing (ice wedging)
• Release of Pressure (gravity)
• Abrasion (particles)
• Animal Action
• Plant Growth

3
Freezing and Thawing

• It rains and fills the cracks in the rock
• The temperature drops to freezing
• The water expands and breaks the rock

4
Release of Pressure

• The weight (gravity) of the rock pulls the rock
  towards the ground

5
Abrasion

• Water, wind, waves, or glaciers pick up rock
  particles and move them against a rock causing a
  sanding affect.

6
Animal Action

• When animals break down rocks

7
Plant Growth

• Roots get into a crack and slowly grow, as the
  root gets larger the rock breaks

8
Chemical Weathering

• Water (H2O or Hydrolysis)
• Oxygen (O2 or Oxidation)
• Carbon Dioxide (CO2)
• Living Organisms
• Acid Rain

9
Water or Hydrolysis

• Water dissolves rock by weakening the chemical
  bonds

10
Oxidation

• Iron Oxygen rust
• The chemical bonds are broken by means of the
  reaction between iron and oxygen.
• Water helps speed the process up

11
Carbon Dioxide

• Carbon dioxide forms carbonic acid
• The acid dissolves rocks made of calcite, such as
  limestone or marble

12
Living Organisms

• Organisms such as Lichen secrete an acid that
  breaks down the rock

13
Acid Rain

• When fossil fuels are burned they release sulfur
  and nitrogen into the atmosphere
• Sulfur and nitrogen combine with other elements
  to form sulfuric and nitric acid
• The acid dissolves rock made of calcite

14
Practice Time

• Number a piece of paper from 1 31
• Dont skip any lines
• Record the type of weathering you see in the
  slides to follow

15
1. CHESLER PARK
16
2. MESA ARCH
17
3.
18
4. GREEN RIVER
19
5. POTHOLE POINT
20
6. BRUNEAU SAND DUNE
21
7.
22
8.
23
9.
24
10.
25
11. GOBI DESERT
26
12. BRYCE CANYON
27
7 Summits

• Tallest mountains on each continent

28
13. 29,028 ft
29
14. Mt. Kilimanjaro
30
15. Mt. Elbrus 18,510
31
16. Mount Aconcagua 22,834 ft
32
17. Mt. McKinley 20,320 ft
33
Carstensz Pyramid 16,502 ft

• 18. Oceania

34
19. Vinson Massif

• Antartica 16,066 ft

35
20.
36
21.
37
22.
38
23.
39
24.
40
25.
41
26.
42
27.
43
28.
44
29.
45
30.
46
31.