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Published byVera Lesmana Modified over 6 years ago
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Internal Forces that Shape the Earth (Plate Actions)
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Plate tectonics The movement of tectonic plates upon the Earth
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Ring of Fire
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Tsunami
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Hot Spot
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Convergent Boundaries
What occurs? Plates collide
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Subduction One plate slides beneath another
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Where: two ocean plates
Trench and island chain TRENCH
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Where: continental &ocean plates Landform: Trench and Mountains
-trench created by subduction
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Boundary: Two land plates collide Landform Created: Mountains
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Divergent Boundary What Occurs? plates separate / spread apart
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Where Occurs? Two ocean plates separate
Landform = Mid ocean ridge
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Where Occurs? Two land plates separate
Landform = Rift Valley
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Transform Boundary Where? Two plates slide against each other
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Landform: Fault
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IV. Earthquakes and volcanoes form along plate boundaries
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External Forces that Shape the Earth
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Weathering The breaking down of rock into sediment
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Mechanical Weathering
Physical actions that creates sediment
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Root Action
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Frost Wedging
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Chemical weathering Chemical process that creates sediment
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Carbonic Acid a. Water + Carbon dissolves limestone
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b. Creates caves
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Acid Rain
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Erosion The carrying away of sediment
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Wind
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Loess Deposits of fine, windblown sediment
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Water is the greatest agent of erosion
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Ice (glaciers)
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Glaciers form U-Shaped valleys
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Moraines – ridges of rock and debris deposited by a glacier
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Soil Creation Loess (soil composed of inorganic matter)
Humus (soil composed of organic matter)
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