Weathering For Sci 8
- 1. statue Grand Canyon Sand Pile What do These 3 Things Have in Common??
- 2. They have all been subjected to the process of WEATHERING
- 3. weathering
- 4. WEATHERING : is THE CHEMICAL AND PHYSICAL PROCESS THAT CHANGES ROCK
- 5. For weathering to occur the rocks must be exposed to: WATER (hydrosphere) AIR (atmosphere) ACTION OF HUMANS & OTHER LIVING ORGANISMS
- 6. Evidence of Weathering: the end product of the weathering of rock is SEDIMENT
- 7. PHYSICAL WEATHERING: ROCKS ARE BROKEN INTO SMALLER PIECES WITHOUT CHANGING THE CHEMICAL NATURE OF THE ROCK
- 8. Explain how water and wind can can cause physical weathering in the following ways:
- 9. The alternate freezing and thawing of water
- 10. WATER EXPANDS WHEN IT FREEZES This is called…….
- 11. Ice Wedging or Frost Action
- 13. Half Dome in Yosemite California
- 14. *ABRASION
- 15. RUNNING WATER AND WIND CAN RUB OR WEAR DOWN ROCKS
- 17. RUNNING WATER AND WIND CAN CAUSE ROCKS TO RUB AGAINST EACH OTHER AND WEAR THEM DOWN
- 19. A sidewalk being lifted by the tree roots!!
- 21. PLANT ROOTS EXPOSES NEW SURFACES TO WEATHERING
- 22. *Humans can influence the rate of weathering by the use of powerful equipment
- 23. If you increase the surface area you will ___________ the rate of weathering increase
- 24. Surface area rate of weathering
- 25. CHEMICAL WEATHERING : Rocks are broken and the chemical composition is also ___________ CHANGED
- 26. OXIDATION OCCURS WHEN __________ FROM AIR COMBINES WITH ___________ TO FORM OXIDES OXYGEN MINERALS RUST
- 27. This was washed up on a beach!!
- 28. A rusty gate……
- 29. CARBONATION OCCURS WHEN __________ CONTAINING __________ ACID DISSOLVES MINERALS WATER CARBONIC
- 30. EX. LIMESTONE CAVES
- 33. * POLLUTANTS can speed up the rate of chemical weathering OXIDES OF SULFER AND NITROGEN MAKE RAINWATER UNNATURALLY ACIDIC ACID RAIN
- 34. HYDRATION OCCURS WHEN _______ SUCH AS MICA AND FELDSPAR ABSORB ________ AND WEAKEN AND FORM ________ MINERALS WATER CLAY
- 36. CLIMATIC EFFECTS ON WEATHERING : PHYSICAL WEATHERING DOMINATES IN COLD, MOIST CLIMATES
- 37. CLIMATIC EFFECTS ON WEATHERING: CHEMICAL WEATHERING DOMINATES IN WARM, MOIST CLIMATES
- 38. IN GENERAL WHEN THERE IS MORE THERE IS MORE WEATHERING MOISTURE
- 39. CLEOPATRA’S NEEDLE Central Park
- 40. RATE OF WEATHERING ALSO DEPENDS ON: MINERAL COMPOSITION ROCK RESISTANCE (HARDNESS)
- 42. SHALE SANDSTONE SHALE SANDSTONE LIMESTONE SHALE DOLOSTONE WHICH ROCK IS THE MOST RESISTANT TO WEATHERING? WATER
- 43. SHALE SANDSTONE SHALE SANDSTONE LIMESTONE SHALE DOLOSTONE WHICH ROCK IS THE MOST RESISTANT TO WEATHERING?
- 44. SHALE SANDSTONE SHALE SANDSTONE LIMESTONE SHALE WHICH ROCK IS THE LEAST RESISTANT TO WEATHERING? DOLOSTONE
- 45. SHALE SANDSTONE SHALE SANDSTONE LIMESTONE SHALE WHICH ROCK IS THE LEAST RESISTANT TO WEATHERING? DOLOSTONE
- 46. SOIL FORMATION: SOIL IS THE COMBINATION OF: ROCK PARTICLES MINERALS ORGANIC MATTER
- 47. THE END RESULT OF WEATHERING AND BIOLOGIC ACTIVITY IS: soil
- 48. Adding to a compost pile
- 51. EROSION
- 52. EROSION: TRANSPORT OF SEDIMENTS
- 53. AND DEPOSITING THEM ELSEWHERE
- 55. EROSION IS DRIVEN BY THE FORCE OF GRAVITY
- 56. THE AGENTS OF EROSION ARE: RUNNING WATER WIND MOVING ICE (GLACIERS)
- 57. Each Agent of Erosion Produces it’s Own Characteristic shape and Texture in the Sediment :
- 59. ROUNDS AND SMOOTHES THE ROCK SURFACE ALSO MAKES IT SMALLER
- 60. WIND BLOWN SEDIMENTS FROST AND PIT THE ROCK SURFACE
- 61. SMALL SEDIMENTS IN THE GLACIER POLISHES & SMOOTHES THE ROCK SURFACE LARGE SEDIMENTS SCRATCH AND STRIATE THE ROCK SURFACE
- 62. FALLEN ROCKS ARE SHARP & ANGULAR
- 63. RUNNING WATER The primary agent of erosion is:
- 64. Colorado River
- 65. Grand Canyon
- 66. Niagra Falls