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Cards In This Set
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Earth is about
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4.6 billion years old
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In the scientific method it must be...
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Tested and verified by observations
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T/F Humanity did not spread virtually to all inhabitable areas after the European Voyages of discovery in the late 1400's and early 1500's
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False
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Why did the Chinese abandon ocean explorations in 1433?
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Political winds changed and the cost of the exercise was too great
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This was the first man to publish a reasonably accurate map of oceans currents
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Ben Franklin
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Glomar Challenger is known mainly for ..
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Taking the first deep sea sediments
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Earth is layered inside, different thickness and densities. How do geologists know this?
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From observing transit times of waves through hte earth by earthquakes
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The magnetic striping of the seafloor is considered evidence of seafloor spreading and...
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Periodic reversals int he polarity of the earth's magnetic field
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An example of an object in buoyant equilibrium would be
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Ice cube in water and plates on heavier material
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A mystery in understanding plate tectonics has until recently thought to be...
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None of the above. It's due to gravity
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An early proponent of continental drift whose work was not well accepted was...
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Alfred Wagner
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Youngest seafloor rocks are found where?
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Near the rift valleys of the mid ocean ridge
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Hydrothermal vents are located near where?
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Active areas of seafloor spreading
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Basaltic rock ...?
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Comprises the actual seafloor
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The first life forms on Earth arose more than ...
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3.5 billion years ago
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