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Cards In This Set
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Holes drilled several kilometers into Earth’s crust provide direct evidence about Earth’s interior in the form of _________________.
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Rock Samples
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Geologists obtain indirect evidence about Earth’s interior by ___________________.
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Recording and studying seismis waves.
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What is the correct order (starting from the surface) of Earth’s layers?
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Crust, mantle, outer core, inner core
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Earth’s inner core is _________________.
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A dense ball of solid metal.
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When you touch a hot pot or pan, energy moves from the pot to your hand. This is called _______________________.
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Heat transfer.
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The transfer of energy through empty space is called ______________.
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Radiation.
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Heat transfer within a fluid takes place by __________________.
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Convection currents.
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When the heat source is removed from a fluid, convection currents in the fluid will ___________________.
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Eventually stop.
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According to Wegener’s hypothesis of continental drift, ________________________________.
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The continents were once joined together in a single landmass.
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What is Pangaea?
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The name of the supercontinent that existed millions of years ago
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Which type of evidence was NOT used by Alfred Wegener to support his continental drift hypothesis?
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Evidence from human remains
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Most geologists rejected Alfred Wegener’s idea of continental drift because _____________________.
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Wegener could not identify a force that could move the continents
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What technology did scientists use in the mid-1900s to map the mid-ocean ridge?
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Sonar
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In sea-floor spreading, molten material rises from the mantle and erupts __________________.
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Along mid-ocean ridges
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How did scientists discover that rocks farther away from the mid-ocean ridge were older than those near it?
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By determining the age of rock samples obtained by drilling on the ocean floor
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