Presentation: Tectonic Plate Motions 1/34
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Transcript
Presentation: Tectonic Plate Motions 1/34
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Poll
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Is the surface of the earth moving?
Yes
No
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Open Ended Question
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What are tectonic plates made from?
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Draw It
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After having discussed it with a partner, use illustrations to explainhow convection takes place in the mantle.
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https://www.youtube.com/watch?v=prfgw8uKXA8
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Quiz
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What are plates?
Areas of earth between the sea.
Countries and continents.
Slabs of rock under the earth and sea.
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How fast are the plates moving?
A metre per day.
A few centimetres per day.
As fast as an apple growing on a tree.
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What heats Earth's interior?
The sun
The Earth's crust
Nuclear power
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Earth’s plates move due to a convection cell in…
the Earth’s crust
the Earth’s mantle
the Earth's inner core
the Earth's outer core
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Material rising from the mantle reaches the surface and moves awayhorizontally.
True
False
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What happens at the ridges?
The material continues to cool and then sinks back down into the mantle at adeep sea trench.
The material gets hotter and then sinks back down into the mantle at a deep seatrench.
The material stays at the top and forms mountains.
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Open Ended Question
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How and why does "seafloor spreading" happen?
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https://drive.google.com/file/d/0B3Lkz9YzJDWASWdMZW1obDY1aHc/edit?usp=sharing
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