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Activating Strategy. Study Jams Video Breaker and Whoosh JUST WRITE THE NOTES IN WHITE PRINT The other is information to make you more intelligent about erosion…and know some cool facts to share with others!!. Erosion.

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activating strategy
Activating Strategy

Study Jams Video

Breaker and Whoosh

JUST WRITE THE NOTES IN WHITE PRINT

The other is information to make you more intelligent about erosion…and know some cool facts to share with others!!

erosion
Erosion
  • Process by which soil and sediment are transported from one location to another
open the flap t op half notes
Open the flapTop half: Notes
  • Gravity is the force that moves rock and other materials downhill.
examples
Examples
  • Landslides
  • Mudflows
  • Slump
  • Creep
landslide
Landslide

Sycamore Canyon

LaConchita

mudflows
Mudflows

Mount St. Helens

bottom half picture
Bottom Half:Picture
  • Now illustrate erosion by gravity
  • One giant scene with the examples of erosion by gravity
what if
What if…

What if you could buy a mountain home near a river or on the waterfront?

things you should know before buying a waterfront property what do you think
Things you should know before buying a waterfront propertyWhat do you think???

Pros:

  • good view,
  • use of beach
  • boat docking

Cons:

  • could have restrictions on use of the beach with protected plants and animals
  • flooding
  • high insurance costs
things you should know before buying a mountain home
Things you should know before buying a mountain home…
  • Pros:
  • High property value because of the beauty of the land
  • mineral rights (you might find minerals on the mountain and can make profit from them
  • Cons:
  • Ice and snow can cause problems trying to get around
  • small creeks can flood and cause erosion
  • might not have access to electricity, internet, sewage systems, etc.
top half notes
Top Half:Notes
  • Moving water is the major agent of erosion that has shaped the Earth’s land surface
bottom half picture1
Bottom Half:Picture
  • Now illustrate erosion by water
  • One giant scene with the examples of erosion by water
website for more information
Website for more information

http://www.geolsoc.org.uk/gsl/education/resources/rockcycle/page3462.html

slide24

These two photos were taken from the same place 63 years apart. How are they alike? How are they different?

1941 2004

erosion by ice
Erosion by Ice
  • A glacier is a huge mass of ice and snow that moves over land. It erodes and deposits large amounts of rock material.
  • p. 352-356
how glaciers form
How glaciers form
  • Over time, the weight of the snow packs the snow and forms a giant mass of ice.
  • Gravity causes them to flow slowly like a “river of ice”
slide30
Glacier ice is the largest reservoir of fresh water on the planet, storing an estimated 75 percent of the world’s supply
a glacier can range in length from the equivalent of a football field to more than 100 miles
A glacier can range in length from the equivalent of a football field to more than 100 miles.
slide35

Mountain valleys are typically “V” shaped before being taken oven by a glacier; during glaciation, the valley widens and deepens and becomes “U” shaped.

erosion by wind
Erosion by Wind
  • Wind carries and deposits sediment.
  • Deserts, coastlines, and areas with little plant coverage are the most affected by wind erosion.
slide39

Sand Dunes

Piles of sand deposited by wind

- Leeward side has a steeper slope

What do you see in the picture that is helping to slow down erosion?

leeward

leeward

windward

at the beach
….at the beach
  • How did humans slow down erosion in this picture?
slide42

Barchan dunes of the Namib Desert

Crescent shaped dunes formed from a unidirectional (one-direction) wind.

slide43

Hueco Bolson Desert – Texas

Ripple marks are miniature dunes within a dune formed by crosswinds (not more than 2 inches tall). They appear to be traveling in a different direction than the large dune.

slide46

Arches National Canyon, Utah

Rock Arches --formed when wind and water weather (erode) softer material first.

slide47

Mt. Falconer - Canada

Ventifact—formed when wind carries fine particles that work like a sand blaster (i.e. sand, silt, clay, and ice particles)

slide48

Desert pavement

Deflation--formed in arid environments when wind carries finer, more lightweight particles such as sand away; large particles are left behind and protect from further erosion

slide49

Loess Deposits - Banks, Pennsylvania

Yellowish, fine grained silt and clay sized particles formed by glaciers millions of years ago; carried and deposited by wind

slide50

Pedestal rockAfrica

What caused the rock to look like this??

Base of a rock is weathered and eroded more quickly due to abrasion (sand blasting)

Wind could only pick up sand grains a couple of feet.

slide51

Erosion by Human Activity

Although moving water is the major agent of erosion that has shaped the Earth’s land surface; Human activity causes 10 times more erosion of the continental surface of the Earth than all natural processes combined.

why is this critical
Why is this critical?
  • Earth\'s surface involves a balanced process, where new soil forms at about the same rate as it erodes.

****If humans are stripping soil at that rate, nature won\'t be able to keep up***

  • Almost all the land that is capable of producing crops is being used by the rapidly growing population.
slide53

Renewable resource

  • is a natural resource which can replenish with the passage of time

Examples

water (hydroelectricity)

solar energy

biofuel (contains energy from living organisms)

Non-renewable resource

--used faster than it is made by the earth

Examples

natural gas, fossil fuels, metal ores (in human timeframe)

slide54

Help!!!

What do we do now?

terracing

Soil Conservation

--protection, preservation, restoration

Terracing

Crop Rotation

Banaue rice terraces, Philippines

check each page
Check each page

Name on the back with class period

Notes—definition of each type of erosion

Illustrations

  • Quality drawings (I’m not an art teacher, but try your best to clearly illustrate!)
  • May need labels
  • Color!!

DUE TUESDAY 10/29

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