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Es > Unit 4 > Flashcards

Unit 4 Flashcards

1
Q

East

A

Increase
Later
Add

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2
Q

West

A

Less
Earlier
Subtract

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3
Q

Who discovered Continental drift and with what evidence

A 
Alfred Wegner
Coal deposits in interesting places 
Glacial marks
Puzzle pieces
Fossil
Mountain ranges
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4
Q

continental crust vs oceanic crust

A

Less dense then ocean
Made of granite whole ocean is basalt
Thicker then ocean

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5
Q

Seafloor spreading

A

Molten material rises from the mantle pushing older rock away to the edge of ridge

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6
Q

Harry Hess

A

Discovered sea floor spreading using sonar readings see underwater mountains

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7
Q

Paleomagnetism

A

Evidence of sea floor spreading. The iron in rocks faces the north magnetic pole creating lines in rock on both sides, mirror image

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8
Q

Normal polarity

A

North magnetic pole lines up with North Pole

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9
Q

Reverse polarity

A

North magnetic pole lines up with South Pole

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10
Q

Conmvection

A

In the asthenosphere creation of magma

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Es (7 decks)

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