weathering, erosion and depostion. weathering the breaking down of rocks into small particles such...
TRANSCRIPT
Weathering, Erosion
and Depostion
Weathering• The breaking down of rocks into
small particles such as sand and pebbles.
• There are two types of weathering: Physical and Chemical weathering.
Physical Weathering• There are several types:
• Exfoliation (flaking) of rocks due to expansion in extremely high daytime temperatures contraction in very cold nights.
Physical Weathering• Ice Wedging – water that gets into the
cracks of rocks freezes and expands to split the rock.
Physical Weathering• Abrasion – particles such as sand are
carried by the wind or water and act like sandpaper.
Physical Weathering• Tree Roots – roots growth can weaken
dirt or work their way into rock cracks
Physical Weathering• Animals or Man – wearing the way of
rock or soil by walking or use of machinery.
Chemical Weathering• When natural chemicals break down rocks
• Acid rain – from air pollution
Chemical Weathering• Natural Acid – from decaying plants
Erosion• The process of carrying away the small rock, sand
or pebble particles. The agents of erosion are:• Wind
Erosion• The process of carrying away the small rock, sand
or pebble particles. The agents of erosion are:• Gravity
Erosion• The process of carrying away the small rock, sand
or pebble particles. The agents of erosion are:• Water
Erosion• The process of carrying away the small rock, sand
or pebble particles. The agents of erosion are:• Animals or Man
Deposition• The depositing or dropping of eroded
material in new location.• Delta or Alluvial Fan
Deposition• Mountain Bases