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.
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!!
or S L O W .
Mount St. Helens
What if you could buy a mountain home near a river or on the waterfront?
These two photos were taken from the same place 63 years apart. How are they alike? How are they different?
Mountain valleys are typically “V” shaped before being taken oven by a glacier; during glaciation, the valley widens and deepens and becomes “U” shaped.
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?
Crescent shaped dunes formed from a unidirectional (one-direction) wind.
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.
Rock Arches --formed when wind and water weather (erode) softer material first.
Ventifact—formed when wind carries fine particles that work like a sand blaster (i.e. sand, silt, clay, and ice particles)
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
Yellowish, fine grained silt and clay sized particles formed by glaciers millions of years ago; carried and deposited by wind
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.
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.
****If humans are stripping soil at that rate, nature won't be able to keep up***
biofuel (contains energy from living organisms)
--used faster than it is made by the earth
natural gas, fossil fuels, metal ores (in human timeframe)
What do we do now?
Name on the back with class period
Notes—definition of each type of erosion
DUE TUESDAY 10/29