Show:
Continental Drift
Plate Tectonics
Volcanoes
Earthquakes
Plate Boundaries
100
Wegener
Who proposed the theory of continental drift?
100
Seafloor Spreading
What is the second theory that combined with Continental Drift to form Plate Tectonics theory?
100
Basaltic
What is the magma type that makes up oceanic crust?
100
P-waves
What earthquake wave pulls & squeezes rocks in the same direction as the wave?
100
Convergent
What is the name for plates that move toward each other?
200
Pangaea
What is the ancient landmass made up of all continents?
200
Convection currents
What is the transfer of energy by flow of heated fluids?
200
Rhyolitic
What is the type of magma that makes up continental crust?
200
S-waves
What earthquake wave moves rock at right angles to the wave motion?
200
Divergent
What is the name for plates that move apart?
300
Paleomagnetism
What are changes in Earth's magnetic field over time?
300
Magnetic reversal
What are changes in Earth's magnetic field?
300
Shield
What is the shape of a volcano with broad, gently sloping sides, made of basaltic lava?
300
Focus
What is the point underground where the rock breaks?
300
Transform
What is the name for plates that slide past one another?
400
Matching coastlines
What did early mapmakers notice that led to support of continental drift?
400
Viscosity
What is resistance to flow?
400
Cinder
What is the shape of a volcano with steep sides, made of rhyolitic lava?
400
Epicenter
What is the point on the surface directly above the focus?
400
Subduction
What is the name for one plate sliding under another one?
500
Mesosaurus
What is fossil evidence used by Wegener?
500
Rift valley
What is a long narrow depression; forms when continental crust separates
500
Composite
What volcanic shape is made of a combination of basaltic & rhyolitic lava?
500
Tsunami
What is a large ocean wave generated by an undersea earthquake?
500
Seismic Gaps
What is the reference to an active fault that has had no activity for a long period of time?