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8 Cards in this Set

  • Front
  • Back
What is Subduction
Where plates collide, it's the sliding of a denser plate under another plate
What is the Crust?
Earth's solid, rocky surface containing the continents and the ocean floor
What is the Mantle?
Earth's layer beneath the surface
What is Original Horizontality
The idea that many kinds of rocks form in flat, horizontal layers
What is Plate Tectonics?
The idea that Earth's surface is broken into plates that move
What is Magma
Hot, molten rock below Earth's surface
What is Continental Drift?
The idea that a supercontinent split apart into pieces, the continents, which drifted in time to their present locations
What is Sea-Floor Spreading?
The idea that new crust is being formed at ridges in the sea floor, spreading apart the crust on either side of the ridges