TODAY Get out your ESRT and a piece of paper The following questions are from your ESRT. You’ll have a minute per question…

Question 1 What are 2 agents of erosion?

Question 2 Define the angle of repose.

Question 3 Name two types of mass movements

Question 4 List two things that make a rock felsic.

Answers What are 2 agents of erosion? –Gravity, water, wind, ice Define the angle of repose. –Angle that sediments can pile up. Name two types of mass movements –Fall, Slump, Flow, Slide List two things that make a rock felsic –Density, composition, color

Wind Erosion

Vocab Velocity –Speed and direction Sandblasting Deflation Dune Loess Ventifact Stream Velocity Water Shed Radial (draw picture) Dendritic (draw picture) Rectangular (draw picture) Meander Oxbow Long Shore Drift

Wind Wind carries sediment and other particles –Size of particle depends on velocity. Faster the wind blows the larger the particles

Sandblasting Sediment is sorted when deposited Best seen in dry regions such as deserts, but can be seen anywhere.

Types of Wind Erosion Deflation –Sand that is moving from the ground Sandblasting –Moving other sediment from other rocks be the continuous pelting of sand or silt.

Sand Blasting from space

3 types of movement Saltation –Bouncing on ground Suspension –Floating in water Creep –Rolling on ground

Vocab Dune –Pile of wind or water moved sediment deposited by sorting. Usually sand… Loess –A fine grained dune Ventifact –A rock that has been weathered with grooves and pits.

Sand Dunes These are piles of sand that has been blown and captured by an object. Notice: Direction of wind and slope

Location

El Dorado Beach

Oswego, NY

Water Erosion

Stream Velocity Stream Velocity is the speed of the water. The streams like wind can carry particles depending on their size and sort them when deposited. Fast = large particles (boulders) Slow = small particles (sand)

Niagara Falls

Moving water makes V’s V shaped valleys are created by running water. Size of the V tells us how much water and for how long. Big V = lots of water over a long time Small V = Little water over short time

The Watershed What is a watershed? –This is the area which a stream receives its water from.

US Watersheds

Draining in a Watershed The way the water drains depends on the topography or geography. Radial = Hill Dendritic = Valley Rectangular = Valley where rocks have cracks in them

Stream Velocity The fastest water is located in the middle of the stream away from the banks (sides).

Ocean Currents How does an ocean erode? –Same as a stream Longshore drift –Current made from breaking waves.

Google Earth? Cape Cod Florida Keys