Past Plate Motions
The large landmass made of all continents
Pangaea
The instrument that records seismic waves
Seismograph (seismometer)
Hawaii is made of volcanoes due to ___________.
Hot spots
The process that forms the new seafloor
Seafloor Spreading
The wave that arrives first is the ___________.
P-wave
A gentler volcano with non-viscous lava
Shield volcano
The force behind plate tectonics
Convection Currents
The wave that arrives second is the ___________.
Secondary wave
An explosive volcano with multiple vents
composite volcano
The theory of ____________ states that continents move to their present positions
Continental Drift
The point on Earth’s surface directly above the origin of an earthquake
epicenter
An explosive volcano with one central vent
Cinder Cone
When two continental plates collide, ____________ form.
Folded mountains
The point in Earth’s interior where an Earthquake releases energy
Focus
This type of lava produces violent volcanic eruptions.
Granitic or silica