crust: Earth´s solid,rocky surface cotaning the continents and ocean floor.
original horizontality:the idea that many kinds of rocks form in flat,horizontal layers
continental drift:the idea that a supercontinent split apart into pices,the continents,which drifted intime4 to their present locations.
sea-floor spreading:the idea that new crust is forming
at ridges in the sea floor,spreading apart the crust on either side of the ridges.
magma:hot,molten rock below Earth´s surface.
plate tectonics:the idea that Earth´s surface is broken into plates that move.
mantle:Earth´s layer beneath the crust.
subduction:where plates collied,the sliding of a denser ocean plate under anothe plate
original horizontality:the idea that many kinds of rocks form in flat,horizontal layers
continental drift:the idea that a supercontinent split apart into pices,the continents,which drifted intime4 to their present locations.
sea-floor spreading:the idea that new crust is forming
at ridges in the sea floor,spreading apart the crust on either side of the ridges.
magma:hot,molten rock below Earth´s surface.
plate tectonics:the idea that Earth´s surface is broken into plates that move.
mantle:Earth´s layer beneath the crust.
subduction:where plates collied,the sliding of a denser ocean plate under anothe plate
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