The largest division of geologic time is a(n) a.Period b.Era c.Epoch d.Geological Time Scale

 What is erosion?  Erosion is the transport (movement) of weathered rocks and sediment from one place to another.  Erosion is usually gradual…  Humans can speed it up.

 What are the agents of erosion?  Wind  Water  Waves  Glaciers (ice)  Gravity (mass movement, mass wasting)

What is the evidence that sediment is being moved from one place to another?

Copyright © Marli Miller, University of OregonUniversity of Oregon Wind moved the sand into a dune.

A glacier is a “river” of ice that slowly moves downhill. As it travels, it breaks off rock and carries it to a new location – EROSION! Copyright © Marli Miller, University of OregonUniversity of Oregon Rocks moved by a glacier. This is glacier deposition. What does the word “deposit” mean? Copyright © Bruce Molnia, Terra Photographics

 What is deposition?  What goes up must come down.  What is carried must be… dropped.  Deposition occurs when agents of erosion deposit (lay down, drop) sediment.

 How do waves change Earth's surface?  Sand bars  Longshore drift

 How do glaciers change Earth's surface?  Large mass of moving ice and snow  Plucking  Abrasion

 How does gravity change Earth’s surface? Rapid Mass Wasting…  Landslide  Mudflow

 How does slow mass wasting erode rocks?  Creep  Slump Slow mass wasting…

 How does wind change Earth's surface?  Deflation  Sand dunes

  Poor soil conservation… What caused the Dust Bowl in the 1930s?

  Running water  Load deposits How does water change Earth's surface?

 Delta Alluvial fan How is a river's load deposited?

  Stalactites and stalagmites And underground…

 Worktime  Have the rubric in front of you  Get the information first  Then, get do all the “fancy” stuff