Gravity’s Effect on Erosion 2/5/15 12-4 pgs. 316-319 IN: How does glaciation change the appearance of mountains?

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Presentation transcript:

Gravity’s Effect on Erosion 2/5/ pgs IN: How does glaciation change the appearance of mountains?

Terms to Learn & Objectives ► Terms: mass movementrock falllandslidecreep mudflow ► Objectives: Explain how slope is related to mass movement. Explain how slope is related to mass movement. State how gravity affects mass movement. State how gravity affects mass movement. Describe different types of mass movements. Describe different types of mass movements.

How does gravity effect erosion? ► Mass Movement – the movement of any material, such as rock, soil, or snow, downslope.

► Mass movement is controlled by the force of gravity and can occur rapidly or slowly.

Angle of Repose ► The angle of repose is the steepest angle, or slope, at which loose material will not slide downslope.

Rapid Mass Movement Rock Fall – a group of loose rocks that fall down a steep slope.

Rapid Mass Movement Landslide – a sudden and rapid movement of a large amount of material downslope.

Rapid Mass Movement Slump – when a block of material moves downslope.

Mudflow – the rapid movement of a large mass of mud/rock and soil mixed with a large amount of water that flows downhill.

Rapid Mass Movement Lahars – mudflows of volcanic origin.

Slow Mass Movement Creep – the extremely slow movement of material downslope.

OUT: What factors increase the potential for mass movement?