Unit 10 Plate Tectonics and Topographic Maps

STUDY
PLAY
continental drift
The hypothesis that the continents slowly move across Earth's surface.
contour line
A line on a topographic map that connects points of equal elevation
convergent boundary
A plate boundary where two plates move toward each other
divergent boundary
A plate boundary where two plates move away from each other
elevation
Height above sea level
fault
A break in a rock mass along which movement has occurred.
lithosphere
Earth's crust and solid upper mantle, broken into tectonic plates
mid-ocean ridge
An undersea mountain chain where new ocean floor is produced.
plate tectonic theory
The scientific theory that the surface of the Earth is broken up into plates that are in constant motion
Pangaea
Ancient landmass made up of all the continents that began to break apart about 200 million years ago.
plate
Sections of the Earth's crust that move due to convection currents.
rift valley
A deep valley that forms where two plates move apart
seafloor spreading
The process that creates new sea floor as plates move away from each other at the mid-ocean ridges
subduction
One plate going under another plate
transform boundary
A plate boundary where two plates move past each other in opposite directions
trench
Deep linear depression in the ocean floor where subduction is taking place.