 What do you see happening in the pictures?  What is happening to the land?  What do you notice that is similar in these pictures?  What do you think is responsible?

 The process by which the surface of the Earth gets worn down.  Removal of solids such as sediment, soil and rocks in the natural environment.

 Wind (speed, frequency)  Ice (glacial ice)  Water  Precipitation (amount, intensity)  Flowing water (rivers, streams, waves, etc.)  Slope - Gravity (especially down-slope)  Living organisms (burrowing animals)  Temperature (average, range)  Storm frequency  Seasonality

 Deforestation  Slash-and-burning of forests  Logging  Overgrazing (Agriculture)  Unmanaged construction activity  Road Building