1. AIM: DO NOW: HW:

2. AIM: WHAT ARE THE DIFFERENT TYPES OF WEATHERING
AIM: WHAT ARE THE DIFFERENT TYPES OF WEATHERING? DO NOW: WHAT IS FOUND IN LIMESTONE THAT CAUSES IT TO REACT EASILY WHEN EXPOSED TO ACID RAIN? (FYI: FLORIDA HAS A FOUNDATION OF LIMESTONE BEDROCK!) HW: WEATHERING WIZARD DUE MONDAY

3. AIM: QUIZ TODAY DO NOW:TAKE AN ESRT AND CLEAR YOUR DESK HW:

4. AIM: WHAT IS WEATHERING. DO NOW: 1. DEFINE THE FOLLOWING TERMS: A
AIM: WHAT IS WEATHERING? DO NOW: 1. DEFINE THE FOLLOWING TERMS: A. RESISTANT B. WEATHERING HW: WEATHERING WIZARD QUIZ DUE NEXT MONDAY AT 11:59 PM

9. WHICH MINERAL ON PAGE 16 IS MOST RESISTANT TO WEATHERING???

11. What do These 3 Things Have in Common??
Statue
Grand Canyon
Sand Pile

12. WEATHERING

13. The physical and chemical processes that change rock.
What is Weathering?
The physical and chemical processes that change rock.

14. For weathering to occur, rocks must be exposed to:
AIR (atmosphere)
WATER (hydrosphere)
HUMAN AND/OR ANIMAL ACTIVITIES

15. Physical Weathering

16. AIM: WHAT ARE THE DIFFERENT TYPES OF WEATHERING
AIM: WHAT ARE THE DIFFERENT TYPES OF WEATHERING? DO NOW: WHAT IS FOUND IN LIMESTONE THAT CAUSES IT TO REACT EASILY WHEN EXPOSED TO ACID RAIN? (FYI: FLORIDA HAS A FOUNDATION OF LIMESTONE BEDROCK!) HW: WEATHERING WIZARD DUE MONDAY

20. What is Physical weathering?
Rocks are broken into smaller pieces without changing the chemical nature of the rock.

21. Physical Weathering

22. Types of Physical Weathering

24. WHY DID THIS HAPPEN??

25. #1 Frost Action

26. Water seeps into cracks….
If it freezes it expands…..
Slowly breaks (wedges) rock apart
Cold and humid climates

29. Plant Action Tree roots grow into tiny cracks in bedrock…..
As the roots grow and expand they break rock apart….
The roots continue to dig deeper and continue the process.

30. Tree roots can damage pavement

31. Abrasion

32. Water causes large angular sediments to tumble into each other……
The angular edges are chipped off…..
The size of the rock decreases and it becomes rounded
Common in running water
“OR”
Wind blows sand against bedrock……
Less resistant layers are chipped away and it becomes pitted
Wind abrasion in dry climates

33. ROUNDED
PITTED

34. Humans!!!!

35. Cute little animals!!!

36. If you increase the surface area, you will ____________ the rate of weathering

37. WHAT VISUAL DIFFERENCE DO YOU SEE BETWEEN THE WEATHERED AND UNWEATHERED SHALE?

38. AIM: WRAP UP WEATHERING
AIM: WRAP UP WEATHERING! DO NOW: TAKE OUT WEATHERING NOTES HW: WIZARD DUE MONDAY AT 11:59PM

39. Chemical Weathering

40. What is Chemical Weathering?
Rocks are broken AND the chemical composition is changed.

41. Types of Chemical Weathering:

43. Oxidation – Oxygen from air combines with minerals to form oxides = RUST

44. Red Sand has been oxidized

45. Oxidation of Statue of Liberty

46. Oxidation of Copper
When copper oxidizes, it turns a greenish color – called patina.

49. 2. Carbonation
Occurs when water containing carbonic acid dissolves minerals

50. Limestone Cave

51. What mineral in the limestone causes it to weather so easily
What mineral in the limestone causes it to weather so easily? How do you know this?

54. Stalactites
Stalagmites

55. 3. Pollution
Oxides of sulfur and nitrogen make rainwater unnaturally acidic.
= Acid Rain

57. 4. HYDRATION When water unites chemically with minerals
Example: Hornblende + Feldspar + water = CLAY

58. Dominates in COLD, MOIST climates
Physical Weathering:
Dominates in COLD, MOIST climates

59. Dominates in WARM, MOIST climates
Chemical Weathering:
Dominates in WARM, MOIST climates

60. What do they both have in common?
In general, when there is more MOISTURE, there is more weathering!

61. What is the end product of weathering?
Sediments

62. The end result of weathering and biologic activity is:
SOIL

63. A B C D Soil Horizons: Bedrock
Top Soil - Rotting plants (organic) & finely weathered rock A B
Little organic material, partially weathered rock C
Partially weathered bedrock D
Bedrock

64. Transported & Residual
Soil Types:
Transported
&
Residual

65. Transported Soils:
Carried (by wind, water, humans) from location of parent rock

66. Most of N.Y. soil is transported by:
GLACIERS

67. Transported Soil

68. AIM: WRAP UP WEATHERING
AIM: WRAP UP WEATHERING! DO NOW: TAKE OUT WEATHERING NOTES HW: WIZARD DUE MONDAY AT 11:59PM

69. Residual Soil:
Remains on top of bedrock from which it was formed.

70. Therefore, similar composition to bedrock below (parent rock)

71. What could affect the rate of weathering? (HINT: PAGE 16 OF THE ESRT)

72. Rock resistance (hardness)

73. Shale Shale Shale Dolostone
Which rock is the most resistant to weathering?
Shale
Limestone
Sandstone
Shale
Sandstone
Shale

74. Which rock is the least resistant to weathering? Shale
Dolostone
Which rock is the least resistant to weathering?
Shale
Limestone
Sandstone
Shale
Sandstone
Shale