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LMS Ch 10.1 DR

Continental Drift Directed Reading

QuestionAnswer
The German scientist Alfred Wegener proposed a hypothesis now called?? Continental Drift.
Wegener hypothesized that the continents formed part of a single land mass, or?? Supercontinent.
Wegener speculated that over millions of years these small continents?? Drifted to their present locations.
What did Wegener hypothesize about mountain ranges such as the Andes?? That the crumpling of the crust in places produced them.
Undersea mountain ranges with steep, narrow valleys in the center are called?? Mid-Ocean Ridges.
Compared to sediment found farther from a ridge, sea-floor sediment closer to a ridge is?? Thinner.
Compared to rocks farther from a ridge, rocks closer to a ridge are?? Younger.
The oldest ocean rocks are?? More than 200 million years old.
Continents move over Earth’s surface?? By the widening sea floor, which acts as a conveyor belt.
The mechanism that verifies Wegener’s hypothesis of continental drift is?? Sea-Floor Spreading.
Magma?? Molten Rock.
Paleomagnetism?? The study of the magnetic properties of rocks.
Rift?? A crack in Earth’s crust.
Sea-Floor Spreading?? The mechanism that causes the continents to move.
Created by: ericyonggyuhong
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