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Constructive and Constructive and Destructive Earth Destructive Earth
ProcessesProcesses
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Today’s Essential Question
How does our Earth’s crust continue to change?
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Today’s Key Vocabulary
landform : feature found on the continental crust
crust: upper layer of the Earth
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Vocabulary
Plate Tectonics: The theory that the Earth’s crust is made up of plates that fit together like a puzzle and that these pieces are in motion.
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Vocabulary
plate: A piece of the Earth’s
crust.
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Vocabulary
fault: The place where two
plates meet.
San Andreas fault in California
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Let’s take a closer look at
the crust and why scientists
think it is moving!
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Georgia’s Fault Line
The Brevard Fault runs southwest to northeast through Alabama, Georgia, and North Carolina.
Scientists believe that it may have once been where the African continent joined the North American continent.
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The Brevard Fault
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Georgia’s Fault Line
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The Earth’s Crust and Plate Tectonics
• Remember the puzzle…… It’s moving!
An_Introduction_to_Continental_Drift video clip
Pangea__The_History_of_the_Continents.video clip
Plate_Tectonics. video clip
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Constructive Plate Movements
• Constructive plate movements build-up the Earth’s crust.
Mountains video clip
Volcanoes video clip
The_Birth_of_Lizard_Island video clip
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Types of Constructive Plate Movement
• mountains : formed when two plates collide
• islands and volcanoes: formed when one plate slides under the other or when two plates pull apart and magma
builds up•
Interactive volcano
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Ring of Fire
The Pacific Ring of Fire is an area where large numbers of earthquakes and volcanic eruptions occur in the Pacific Ocean.
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Georgia’s Stone Mountain
Stone Mountain is located near Atlanta, Georgia. It was formed during the formation of the Blue Ridge Mountains. Scientists believe that magma swelled up from the Earth’s crust and hardened into a granite dome.
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Destructive Plate Movement • Destructive
plate movement tears down the Earth’s crust
Earthquakes video clips
The_Eruption_of_Mount_Saint_Helens_in_Washington_State video clip
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Types of Destructive Movements
• earthquakes: formed when two plates slide past each other
• volcanoes: volcanoes both build-up the Earth with lava and tear down the Earth with its eruptions.
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Destructive Processes
Weathering
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Match the plate movement with the picture.
colliding
separating
sliding past
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Classify– Constructive/ DestructiveCon
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