Weathering
What is Weathering? <ul><li>when surface processes break down rock into small pieces called sediment </li></ul>
Mechanical Weathering <ul><li>physical process break </li></ul><ul><li>rocks into fragments  </li></ul><ul><li>with the sa...
<ul><li>plant roots and burrowing animals cause mechanical weathering </li></ul>
Ice Wedging <ul><li>water enters cracks and freezes and expands, breaking rocks apart </li></ul>
<ul><li>small pieces of rock have more surface area than larger pieces of rock and weather faster </li></ul>
Chemical Weathering <ul><li>chemical reactions dissolve minerals in rocks or change them into different minerals </li></ul>
<ul><li>carbonic acid (formed from carbon dioxide gas and water) and plant acids can weather rock </li></ul>
Oxidation <ul><li>chemical process that occurs when iron is exposed to oxygen in the air </li></ul>
Climate <ul><li>pattern of weather that occurs OVER TIME </li></ul>
<ul><li>mechanical weathering is more rapid than chemical weathering in COLD climates </li></ul>
 
<ul><li>chemical weathering is more rapid than mechanical weathering in WARM, WET climates </li></ul>
<ul><li>Rock type can affect rates of weathering </li></ul>
 
Upcoming SlideShare
Loading in …5
×

Ch 7 1 - weathering

1,400 views

Published on

Published in: Education
0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total views
1,400
On SlideShare
0
From Embeds
0
Number of Embeds
111
Actions
Shares
0
Downloads
33
Comments
0
Likes
1
Embeds 0
No embeds

No notes for slide

Ch 7 1 - weathering

  1. 1. Weathering
  2. 2. What is Weathering? <ul><li>when surface processes break down rock into small pieces called sediment </li></ul>
  3. 3. Mechanical Weathering <ul><li>physical process break </li></ul><ul><li>rocks into fragments </li></ul><ul><li>with the same chemical </li></ul><ul><li>makeup as the original </li></ul><ul><li>Rock . </li></ul><ul><li>WIND / WATER ! </li></ul>
  4. 4. <ul><li>plant roots and burrowing animals cause mechanical weathering </li></ul>
  5. 5. Ice Wedging <ul><li>water enters cracks and freezes and expands, breaking rocks apart </li></ul>
  6. 6. <ul><li>small pieces of rock have more surface area than larger pieces of rock and weather faster </li></ul>
  7. 7. Chemical Weathering <ul><li>chemical reactions dissolve minerals in rocks or change them into different minerals </li></ul>
  8. 8. <ul><li>carbonic acid (formed from carbon dioxide gas and water) and plant acids can weather rock </li></ul>
  9. 9. Oxidation <ul><li>chemical process that occurs when iron is exposed to oxygen in the air </li></ul>
  10. 10. Climate <ul><li>pattern of weather that occurs OVER TIME </li></ul>
  11. 11. <ul><li>mechanical weathering is more rapid than chemical weathering in COLD climates </li></ul>
  12. 13. <ul><li>chemical weathering is more rapid than mechanical weathering in WARM, WET climates </li></ul>
  13. 14. <ul><li>Rock type can affect rates of weathering </li></ul>

×