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What is sonar and how does it work?
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What is Pangaea?
Pangaea is a super continent that broke apart over 200 million years ago.
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Where are the plate boundaries?
Look at page B20 in green science textbook.
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What happens at plate boundaries?
They move apart, come together, and slide in opposite directions. This can cause earthquakes and volcanoes.
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Explain and identify sea-floor spreading, and label what it would look like.
B27 and B28
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How could different fossils/plants be located on two different continents (theory of continental drift)? And how can climate be a factor?
Fossils were on a certain spot when Pangaea still existed, then it broke apart. Plants could have survived in a different climate zone when Pangaea existed.
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Tectonic Plates
The dozen or so plates that make up the surface of the Earth.
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Mid-Ocean Ridge
A series of mountain ranges on the ocean floor, more than 52,000 miles in length, extending through the North and South Atlantic, the Indian Ocean, and the South Pacific.
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Crust
The solid, rocky outer portion or shell of the earth; lithosphere.
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Continental Drift
The theory that the continents slowly moved apart millions of years ago.
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Sea-Floor Spreading
The process by which new oceanic crust is formed by the convective upwelling of magma at mid-ocean ridges.
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Magnetic Reversal
A change in the Earth's magnetic field resulting in the magnetic north being aligned with the geographic south, and the magnetic south being aligned with the geographic north.
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Plate Boundary
The edges of individual tectonic plates.
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Convergent
When two plates move towards each other. Colliding.
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Divergent
When two plates move away from each other. Dividing.
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Transform
When two plates slide against each other in the opposite direction.
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