Weathering erosion honors
Upcoming SlideShare
Loading in...5
×
 

Weathering erosion honors

on

  • 1,228 views

 

Statistics

Views

Total Views
1,228
Views on SlideShare
1,193
Embed Views
35

Actions

Likes
0
Downloads
29
Comments
0

1 Embed 35

http://mrwasley.whpswiki.com 35

Accessibility

Categories

Upload Details

Uploaded via as Apple Keynote

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n
  • \n

Weathering erosion honors Weathering erosion honors Presentation Transcript

  • WEATHERING AND EROSION Honors Earth Science Mr. Wasley
  • CONSIDER THIS...
  • CONSIDER THIS...• You see a brand new sidewalk on your local street. The concrete has hardened and it’s ready for pedestrians to walk on it. What kind of things could happen to this sidewalk over time?
  • CONSIDER THIS...• You see a brand new sidewalk on your local street. The concrete has hardened and it’s ready for pedestrians to walk on it. What kind of things could happen to this sidewalk over time? • Chipped/ Cracked
  • CONSIDER THIS...• You see a brand new sidewalk on your local street. The concrete has hardened and it’s ready for pedestrians to walk on it. What kind of things could happen to this sidewalk over time? • Chipped/ Cracked • Pebbles can get exposed at the surface
  • CONSIDER THIS...• You see a brand new sidewalk on your local street. The concrete has hardened and it’s ready for pedestrians to walk on it. What kind of things could happen to this sidewalk over time? • Chipped/ Cracked • Pebbles can get exposed at the surface •A tree may heave the sidewalk with its roots
  • TYPES OF WEATHERING• Mechanical Weathering: physicalforces that break rock into smaller pieces without changing the rock’s mineral composition• Chemical Weathering: chemical transformation of rock into one or more new compounds
  • WHAT HAPPENS ON THEMOON STAYS ON THE MOON
  • MECHANICAL WEATHERING
  • MECHANICAL WEATHERING Frost Wedging
  • MECHANICAL WEATHERING Frost Wedging• Remember back when we talked about water and ice
  • MECHANICAL WEATHERING Frost Wedging • Remember back when we talked about water and ice• Liquid water expands 9% when it freezes.
  • MECHANICAL WEATHERING Frost Wedging • Remember back when we talked about water and ice• Liquid water expands 9% when it freezes.• Creates a tremendous outward force
  • MECHANICAL WEATHERING Frost Wedging • Remember back when we talked about water and ice• Liquid water expands 9% when it freezes.• Creates a tremendous outward force• Water works its ways into cracks, enlarging the holes every freeze and thaw- example: pot holes
  • MECHANICAL WEATHERING
  • MECHANICAL WEATHERING Uploading
  • MECHANICAL WEATHERING Uploading• Anyone ever been to Yosemite National Park?
  • MECHANICAL WEATHERING Uploading • Anyone ever been to Yosemite National Park?• Large amounts of overlying rock are eroded (examples- granite or glaciers)
  • MECHANICAL WEATHERING Uploading • Anyone ever been to Yosemite National Park?• Large amounts of overlying rock are eroded (examples- granite or glaciers)• Rockunderneath experience LESS pressure from above, so it expands
  • MECHANICAL WEATHERING Uploading • Anyone ever been to Yosemite National Park?• Large amounts of overlying rock are eroded (examples- granite or glaciers)• Rockunderneath experience LESS pressure from above, so it expands• Continued weathering causes slabs to separate off, creating exfoliation domes
  • MECHANICAL WEATHERING
  • MECHANICAL WEATHERING Abrasion
  • MECHANICAL WEATHERING Abrasion• Rocks battling out, leaving scars
  • MECHANICAL WEATHERING Abrasion • Rocks battling out, leaving scars• Mechanical scrapping of a rock surface by friction between rock and moving particles during their transport by wind, glaciers, waves, gravity, and running water
  • MECHANICAL WEATHERING Abrasion • Rocks battling out, leaving scars• Mechanical scrapping of a rock surface by friction between rock and moving particles during their transport by wind, glaciers, waves, gravity, and running water• Rocks break into smaller pieces
  • MECHANICAL WEATHERING
  • MECHANICAL WEATHERING Biological
  • MECHANICAL WEATHERING Biological• The battle for minerals and safety
  • MECHANICAL WEATHERING Biological • The battle for minerals and safety• Root Wedging- Plants can wedge rocks apart with their roots
  • MECHANICAL WEATHERING Biological • The battle for minerals and safety• Root Wedging- Plants can wedge rocks apart with their roots• Burrowing animals can move rocks from underneath to the surface
  • CHEMICAL WEATHERING
  • CHEMICAL WEATHERING Carbonic Acid
  • CHEMICAL WEATHERING Carbonic Acid• Carbonic acid + Limestone= Spelunkers!!!
  • CHEMICAL WEATHERING Carbonic Acid • Carbonic acid + Limestone= Spelunkers!!!• Carbon dioxide (CO2) dissolved in water forms carbonic acid (H2CO3)
  • CHEMICAL WEATHERING Carbonic Acid • Carbonic acid + Limestone= Spelunkers!!!• Carbon dioxide (CO2) dissolved in water forms carbonic acid (H2CO3)• Rain dissolves some carbon dioxide as it falls in the atmosphere
  • CHEMICAL WEATHERING Carbonic Acid • Carbonic acid + Limestone= Spelunkers!!!• Carbon dioxide (CO2) dissolved in water forms carbonic acid (H2CO3)• Rain dissolves some carbon dioxide as it falls in the atmosphere• It reacts with minerals in rocks and breaks it down
  • CHEMICAL WEATHERING
  • CHEMICAL WEATHERING Hydrolysis
  • CHEMICAL WEATHERING Hydrolysis• This is how granite breaks down!
  • CHEMICAL WEATHERING Hydrolysis • This is how granite breaks down!• Minerals in the rock and hydrogen in rain water chemically react
  • CHEMICAL WEATHERING Hydrolysis • This is how granite breaks down!• Minerals in the rock and hydrogen in rain water chemically react• Examples: Feldspar in granite changes to clay mineral which crumbles easily.
  • CHEMICAL WEATHERING
  • CHEMICAL WEATHERING Oxidation
  • CHEMICAL WEATHERING Oxidation• Don’t leave your tools outside
  • CHEMICAL WEATHERING Oxidation • Don’t leave your tools outside• Oxygen combines with water and minerals in the rock.
  • CHEMICAL WEATHERING Oxidation • Don’t leave your tools outside• Oxygen combines with water and minerals in the rock.• Withiron reacts with oxygen, reddish-brown iron oxide is formed
  • CHEMICAL WEATHERING Oxidation • Don’t leave your tools outside• Oxygen combines with water and minerals in the rock.• Withiron reacts with oxygen, reddish-brown iron oxide is formed• The iron oxide crumbles easily and weakens the rock
  • BACK TO THE SIDEWALK• Lookat your notes and write down ways a sidewalk could be weathered. Work with a neighbor to see how many you could come up with!
  • EFFECTS OF WEATHERING• Yoursidewalk could be weathered differently depending on two couple things
  • EFFECTS OF WEATHERING• Climate • Temperature: Warm climates favor chemical weathering while cold climates favor mechanical weathering • Moisture: The more moisture, the more weathering occurs• Mineral Composition • the type of rock can affect weathering. • limestone will dissolve in mildly acidic rainwater
  • EROSION•A natural process of weathering that transports solids like soil, rock, and sediment.• Deposits the solids somewhere else.• Agents of erosion: • water • wind • ice• Solids move to other location under the force of gravity
  • ACID RAIN•A very dangerous weather phenomenon•A type of chemical weathering due to increased pollutants like nitrogen oxide and sulfur dioxide• Rain is naturally acidic, but when it is more acidic than usual we call it acid rain• Makes the entire atmosphere poisoned in a certain place. • Raises the acidic level of soil • Water bodies like lakes, ponds, and streams are affected • Buildings and statues can be chemically weathered
  • EFFECTS OF ACID RAIN
  • WRAP IT UP• What part of the rock cycle involves weathering and erosion• What are the two types of weathering?• Weathering breaks down the solids, Erosion moves the solids• What is acid rain? What does it affect?