  Natural Disasters  Plate Tectonics  Weathering, Erosion, and Deposition  Surface Water  Groundwater Forces That Shape The Earth.

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Presentation transcript:

  Natural Disasters  Plate Tectonics  Weathering, Erosion, and Deposition  Surface Water  Groundwater Forces That Shape The Earth

  Weathering is the breaking down of rock  Physical: materials or minerals stay the same but may look different (plant roots, ice wedging, animals burrowing)  Chemical: rock changes its minerals (oxidation or rust, lichen produce acid, carbonic acid makes caverns) Weathering

  Erosion is the carrying away of sediment to a new place  Forces that move sediment:  Wind  Water (waves, rain)  Gravity  Ice or glaciers  Human effect Erosion

  Deposition occurs when erosional forces deposit or drop off material its been carrying  New land is created using materials from other locations upstream  Depositional landforms:  Delta  Sand dunes  Landslide material  Sandbars  Alluvial fan Deposition