Summary: Science Chapter 14
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1 Science chapter 14
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The supercontinent that began to break apart about 200 million years ago
Pangaea -
Wegner's hypothesis which suggested that the continents are in constant motion on earth surface
Continental drift -
Naturally preserved remains or imprints or traces of organisms that lived long ago
Fossils -
The process by which new oceanic crust forms along a mid ocean ridge and older oceanic crust moves away from the ridge
Seafloor spreading -
The mountain ranges in the middle of the oceans that are underwater mountains
Mid ocean ridge -
A state in which magnetized objects such as compass needle's will orientate themselves to point north
Normal polarity -
A state in which magnetized objects would reverse direction and orientate them selves to point south
Reversed polarity -
The theory that states earths surface is made out of rigid slabs of rock or plates that move with respect to each other
Plate tectonics theory -
The cold and rigid outermost rock layer
Lithosphere -
Capable of being molded or changing shape without breaking
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