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16 questions
What is this a picture of?
plate tectonics
continental drift
pangaea
glacier scaring
Scientists think that the continents once formed a giant landmass that broke apart, and then slowly drifted apart. What is the name given to this hypothesis?
sea-floor Spreading
plate tectonics
continental drift
Pangaea
Most geologist think that the movement of Earth's tectonic plates is caused by
the rotation of the Earth.
the Earth's magnetic field.
subduction.
convection currents.
Ocean crust is made of _______ and is _______ dense than continental crust.
basalt, less
basalt, more
granite, less
granite, more
Most tectonic plates have both oceanic and continental crust. How are they different?
Oceanic is thinner and less dense than continental.
Continental is thinner than more dense than oceanic.
Continental is thicker and less dense than oceanic.
Oceanic is thicker and more dense than continental.
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