5th grade-ch. 9 lesson 2 what causes earthquakes and volcanoes
TRANSCRIPT
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Ch. 9Lesson 2
What causes earthquakes &
volcanoes?
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plate
• section of lithosphere
• move b/c of gravity & convection currents
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Plates at our planet’s surface move because of the intense heat in the Earth’s core that causes molten rock in the mantle to move. It moves in a pattern called a convection current that forms when warm material rises, cools, and eventually sinks down.As the cooled material sinks down, it is warmed and rises again.
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3 kinds of plate
boundaries
converging boundary
spreading(divergent)boundary
sliding (transform)boundary
2 platescollide
plates moveapart
•plates move past each other
•oppositedirections
Plate Boundaries interactive animation
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converging plate boundary
Converging plate boundary animation
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spreading plate boundary
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Atlantic Ocean-
spreading plate
boundary
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sliding plate boundary
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California-sliding plate boundary
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Which plate boundary type caused this? converging, spreading or sliding
converging plate
boundary
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Which plate boundary type caused this? converging, spreading or sliding
sliding plate
boundary
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Which plate boundary type caused this? converging, spreading or sliding
converging plate
boundary
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Which plate boundary type caused this? converging, spreading or sliding
spreading plate
boundary
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Plate boundaries edible activity
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Bill Nye Song-Earthquake Rumble
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earthquakes•destructive force•occur @ faults along plate boundaries
•energy released can cause landslides & tsunamis
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fault• crack in Earth’s crust where surrounding rock has moved or shifted
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place on Earth’s surface above focus
place where plates start to slip
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Earthquakes [00:57]
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landslidelandslide
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large wave caused by earthquake under the ocean
Tsunami Clay Animation
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• Although you might not wish to touch lava with a "ten foot pole“, this potentially hazardous activity is all in a day's work for a volcanologist.
• The long pole contains a
special probe that can measure the temperature of the lava.
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volcanoes• form near colliding plate boundaries
• constructive process-makes new land
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volcanoes• form volcanic islands when reaches surface of water in ocean
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