Ch 5 Flashcards
The supercontinent
Pangea
We gents idea that the continents slowly moved over earths surface
Continental drift
Any trace of an ancient organism that has been preserved in rock
Fossil
Mountain ranges that formed along the middle of some oceans
Mid ocean ridges
A device that uses sound waves to measure the distance to an object
Sonar
The process where mid ocean ridges continually add new material to the ocean Floor
Sea floor spreading
Deep underwater canyons
Deep ocean trenches
The process by which the ocean floor sinks beneath a deep ocean trench and back into the mantle again is called
Subduction
The many broken peices of the lithosphere
Plates
Plates move apart
Divergent boundary
Plates come together
Convergent boundary
Plates slip past each other
Transform boundary
Earths plates and plate motion into a single theory called
Plate techtonics
Break in earths crust where rocks have slipped past each other
Faults
A deep valley where peices of earths crust diverge on land
Rift Valley