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25 Cards in this Set
- Front
- Back
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Most of the earth's volume is in the... -Crust -Outer Core -Mantle -Inner Core |
Mantle
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The center layer of the earth is the
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inner core
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The layer of the earth that has the most influence on earth's magnetic field is the
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outer core
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The part of the earth that contains the ocean floor and the continents is the (2 answers)
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crust or lithosphere
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the layer that is a solid layer of the mantle that moves like silly putty and the tectonic plates move on top of is the
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Asthenosphere
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the layer that is made of the upper mantle and the crust is the
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lithosphere
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convection currents flow in the
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asthenosphere
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the convection currents get their energy from the core
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as you go deeper inside the earth...
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the temp., density, and pressure all increase
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name the differences between the continental and oceanic crust
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Oceanic: Contains the ocean floors More dense than the continental Younger than the continental Thinner than the continental Made mostly of basalt |
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What theory says that the Earth's landmasses were once together and have since drifted apart?
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Continental drift- Alfred Wegner
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Why didn't the other scientists agree with Wegner's theory?
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He wasn't a geologist and he couldn't explain how the continents moved.
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Which scientist did NOT contribute evidence to support Wegner's hypothesis? -Dan McKenzie -Arthur Holmes -Charles Darwin -Harold Hess |
Charles Darwin
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the main cause of movement in plates or plate tectonics are
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convection currents
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Which is not a part of plate tectonics? -the idea that earth is broken into large, rigid pieces of asthenosphere -the idea that the ocean floor forms new crust at the center -the idea that the ocean floor is recycled when it subducts -the idea that convection currents move the plates |
-the idea that the earth is broken into large rigid pieces of the asthenosphere
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seafloor spreading shows that oceanic crust is _________ (older/younger) at a ridge and is _________ (older/younger) near a trench
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younger older
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which theory explains how and why the continents move? -plate tectonics -continental drift -sea floor spreading -convection currents |
convection currents
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what inventions helped add new evidence for continental drift?
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submarine, sonar, and magnetometer
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a tectonic plate is a piece of earth's ____
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lithosphere
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what does not occur at a divergent boundary? -rift valleys -mid-ocean ridges -new crust forms -volcanoes form |
volcanoes form
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what occurs at a continental continental collision?
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folding and crumbling tallest mountains crust destroyed |
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what kind of boundary does not destroy or create crust?
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transform
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why do earthquakes occur at tectonic plate boundaries?
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stress builds up
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rift valleys occur at which boundary>
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divergent continental
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