Plate Techtonics 2 Flashcards
Mid ocean ridge
A large chain of volcanic mountains on the ocean floor
Seafloor spreading
The process in which new ocean floor forms from magma released at boundaries between two oceanic plates
Rift valley
Valley that forms as two continental plates pull apart and new crust forms the space between
Plate boundary
The region were two tectonic plates meet
Subduction zone
The region where one tectonic plate slides under another tectonic plate
Volcano
An opening in earth surface through which magma is released
Island arc
A long curved chain of islands that form from volcanic activity
Hotspot
An area volcanic activity near the middle of a tech tonic plate
Earthquake
The shaking of earths surface
Seismic wave
A wave of energy that travels away from the center of an earthquake in all directions
Fault
A break, or crack in earths surface long which rock has moved
Fold
A ripple in earths crust forms when rock layers are squeezd together and pushed upward
