Science11/07
Terms
undefined, object
copy deck
- divergent boundry
- moving away
- rift valley
- valley where plates move apart
- subduction
- the process by which oceanic crust sinks beneath a deep ocean trench and back into the mantle at coliding plate boundrys
- transform boundry
- sliding past (up and down)
- pangea
- a landmass that broke apart 200 million years ago and gave gave rise to today's contintents
- destructive force
- breaks down earth's surface
- plate techtonics
- the theory that pieces of earth's lithosphere are in constant motion
- mid-ocean ridge
- an undersea mountain chain where new ocean floor is produced
- seafloor spreading
- the process by which molten material adds new oceanic crust
- density
- the amount of mass of a substance in a given
- destructive force
- breaks down earth's surface
- sonar
- device to determine the distance of an object under water
- construtive force
- builds up earth's surface
- continent
- one of earth's seven land masses
- deep ocean trench
- a deep valley along the ocean floor beneath which oceanic crust slowly sinks toward the mantle
- continenal drift
- the hyptheses that the continents slowly move across earth's surface
- plate
- a section of the lithosphere that slowly moves over the atmosphere
- convergent boundry
- coming together
- transform boundry
- sliding past (up and down)