Warm

1

• WarmUp
• Whats the difference between erosion and
  weathering?
• What are some ways that soil can be eroded?
• What do you think can happen to areas who have to
  much erosion?
• What are some ways to identify a mineral?

2
homework

• What are some things that humans can do to not
  have another dust bowl? What can learn from the
  dust bowl and our soil at that time?

3

• Look at these three naturally occurring
  materials.
• Write at least 3 sentences about them.
• things they have in common
• things that are different about them

soil
minerals
rocks
4
Weathering and Erosion
5
Weathering

• Weathering is The process where natural forces
  break down rocks

6
Type of Weathering Frost Wedging
Rocks split apart when water freezes and expands.
7
Frost Wedging

• slowly broke up this sedimentary rock into
  unusual shapes.

8
Type of Weathering Plant Roots
Trees, bushes, and other plants may grow in
cracks in rocks as the roots grows causing split
rock.
9
Type of Weathering Water

• Water weathers rock by rubbing it over and over
  again.

10
Type of Weathering Acid Rain
Rain or snow that has been polluted.
11
Erosion

• The process where water, ice, wind or gravity
  moves bits of rock and soil.

12
What is the Difference BetweenWeathering and
Erosion??

• Weathering Occurs when a particle is loosened
  but stays in one place.
• Erosion Occurs once the particle starts moving.

13
Deposition

• Deposition Sediment is placed in a new location.
• Gravity important part of erosion and
  deposition.

14
Which mountain experienced the most erosion?
Height in the year 1508 A.D. Height in the year 2008 A.D.
Mountain A 1500 Meters 1450 Meters
Mountain B 1500 Meters 1250 Meters
Mountain C 1500 Meters 1320 Meters
Mountain D 1500 Meters 1400 Meters
15
Which mountain experienced the most deposition?
Height in the year 1508 A.D. Height in the year 2008 A.D.
Mountain A 1500 Meters 1520 Meters
Mountain B 1500 Meters 1540 Meters
Mountain C 1500 Meters 1600 Meters
Mountain D 1500 Meters 1530 Meters
16

• Weathering ? Erosion ? Deposition

17
Water Erosion

• Rivers, streams, and runoff

18
Water

• In this picture the running water eroded the
  sides of this canyon and created the V-shaped
  valleys.

19
Ice Erosion

• Glaciers large mass of ice that moves over
  land

Glaciers carve land, move sediments, break up
rock
This is a picture of a glacier which carves out a
U-shaped valley where it flows dragging rocks and
boulders along the way.
20
Wind Erosion
21
Wind

• Rocks can be blasted by wind and sand causing
  them to become rounded.

22
Mass Movements

• Landslides, mudslides

23
Creep
This is a diagram of creep. The hillside slowly
slips over many years from temperature or water.
24

• Ocean waves, currents powered by wind -gt move
  thousands of tons of sand on beaches can change
  the look of the land and shape a variety of
  coastal landforms
• Barrier islands long, narrow islands that
  develop parallel to the coast

25
Port Campbell National Park

• Movement of water, constant action of waves
  breaking against the cliffs

Caused slow wearing of the cliffs
26
South Rim, Grand Canyon National Park
27
A Rocks Story

• Tell the story of a rocks life cycle.
• Explain the rock cycle in your own words.
• Describe all the ways a rock can change.
• Explain how your rock Weathered, eroded or
  deposited somewhere etc.
• Your answer should include
• The 3 types of rocks
• The way each type of rock is formed
• How one type of rock can change into another.
• You may include pictures when you have finished
  your story