Weathering And Soil

2,497 views

Published on

Pearson 6th Earth Science

Published in: Education, Technology, Business
1 Comment
0 Likes
Statistics
Notes
  • Be the first to like this

No Downloads
Views
Total views
2,497
On SlideShare
0
From Embeds
0
Number of Embeds
21
Actions
Shares
0
Downloads
99
Comments
1
Likes
0
Embeds 0
No embeds

No notes for slide

Weathering And Soil

  1. 1. WEATHERING and SOIL
  2. 2. <ul><li>1. _____________ - the process that breaks rocks down into smaller and smaller fragments. </li></ul><ul><li>2. _________- carrying pieces away </li></ul><ul><li>3. _______________- the principle that states that processes operate the same as they did in the past </li></ul><ul><li>4. - weathering; </li></ul><ul><li>breaking into pieces caused by freezing and thawing </li></ul>Weathering mechanical erosion uniformitarianism
  3. 3. A.______________- water freezes in cracks and expands Ice wedging
  4. 4. B. ____________ - roots grow under and into other materials C.____________-digging can expose new rock surfaces to weathering Plants Animals
  5. 5. Vegetation growing in Joints
  6. 6. <ul><li>D. __________-rubbing or pulling due to </li></ul><ul><li>__________, ___________, or _______ </li></ul>abrasion gravity, running water wind
  7. 7. <ul><li>________________- peeling action of weather rocks. </li></ul>exfoliation
  8. 8. This is a picture of the Half Dome. The rock is peeling away from the mountain in layers just like an onion. This is exfoliation.
  9. 9. 5. ________ weathering; process that causes chemical changes to occur ; caused by the action of water, oxygen, CO ², living organisms and acid rain chemical
  10. 10. <ul><li>______________- carbonic acid </li></ul><ul><li>(carbon dioxide and water) react </li></ul><ul><li>with rock to form new substances. </li></ul>Carbonation
  11. 11. B. _________- oxygen combines with metallic materials (such as iron) to form rust. oxidation
  12. 12. C. ______________- organisms that break down the remains of dead organisms (fungi, bacteria, worms) decomposers
  13. 13. permeability 6. ___________ rocks with a _______ density; many spaces low
  14. 14. impermeability 7.________________rocks with a ____ density; tightly packed high
  15. 15. Look at the 2 examples of WEATHERING Chemical Mechanical Are these mechanical or chemical?
  16. 16. 8. Rates of weathering A._____________- eventually break down. All rocks
  17. 17. B. _________- rocks decompose ______ if they crystallize fast. (Ex. Marble will decompose faster than granite). Igneous faster
  18. 18. C. Sedimentary rocks decompose faster in _______ climates. humid
  19. 19. D. __________and ____________ speed up chemical weathering. Heat moisture
  20. 20. <ul><li>E. _____________and __________ speed up mechanical weathering. </li></ul>Freezing thawing
  21. 21. <ul><li>9. mixture of weathered rock, decayed organic matter, mineral fragments, water, and air. </li></ul><ul><li>10. Factors that affect soil formation </li></ul><ul><li>A. </li></ul><ul><li>B. </li></ul><ul><li>C. </li></ul><ul><li>D. </li></ul><ul><li>E. </li></ul>soil- Climate Slope of land Type of rock Types of vegetation Amount of time rock has been weathered
  22. 22. 11. __________- layer of solid rock beneath the soil layers bedrock
  23. 23. 12._______ - decayed organic matter . humus
  24. 24. 13.- ______ ________ different layers of soil . soil horizon 14. _____ _______ - vertical layering of all soil horizons . soil profile topsoil subsoil
  25. 26. 15. ____- soil made up of equal parts of clay, sand, and silt; great for growing plants loam
  26. 27. <ul><li>16. Causes of erosion </li></ul><ul><li>___________ </li></ul><ul><li>___________________ </li></ul>slope agricultural cultivation
  27. 28. C. __________________ -the removal of plants, trees, etc. for lumber, farming and grazing. deforestation
  28. 29. D. ______________ Overgrazing
  29. 30. E. _____________________ Urban construction
  30. 31. 17. Soil Conservation Techniques
  31. 32. <ul><li>A. ______________ - cultivating sideways rows on a hill. </li></ul>contour plowing
  32. 33. B. _________ - building step-like levels on a hill. terracing
  33. 34. <ul><li>_____________and </li></ul><ul><li>____________-planting different crops in different places each year. </li></ul>strip cropping crop rotation
  34. 35. D. ______________ - planting trees to block the wind. shelter belt
  35. 36. E. _____________ ____________-not allowing animals to eat too much of any one pasture area. F.__________________- leaving plant stalks to be tilled under in the spring when planting. Proper grazing management No till-farming
  36. 37. G. Use of _____, ____________, _____, _________ or ____________ to slow erosion. H.____________- planting trees on barren areas mulch concrete walls stone wood mats plastic coverings reforestation
  37. 38. <ul><li>18._____________ - soil is damaged from little or no rainfall causing desert-like conditions. </li></ul>desertification
  38. 40. 19. ___________- area of the Midwest where in the 1930’s the soil was ruined by poor farming techniques Dust Bowl
  39. 41. <ul><li>20. ________- water soaks into lower soil horizons </li></ul>leaching
  40. 43. The End

×