Plate Tectonics
The person who suggested that all the continents were all connected as one large landmass
Alfred Wegener
The instrument that measures seismic waves
Seismograph
An opening in Earth that erupts gases, ash, and lava
Volcano
The large landmass that means "all land"
Pangaea
A ____ is an opening that magma flows out of
vent
The theory that states that Earth's crust and part of the upper mantle are broken into sections
Plate tectonics
The that waves that are generated by an earthquake
Seismic waves
An area where Earth's plates are moving apart
Divergent Plate Boundary
A steep-walled depression around a volcano's vent
Crater
The _________ is the measure of the energy that is released during an earthquake
magnitude
The sections that move on the plastic like layer of the mantle.
Plates
The scale that is based on the height of the lines on a seismogram that does not have an upper limit
Richter Scale
What does "dormant" mean when used to refer to a volcano?
Sleeping
Where oceanic and continental plates collide and the oceanic plate plunges beneath the less dense continental plate
Subdution
When hot rock is forced towards the cracks where it melts partially to form a _______
hot spot
Another word for the lithosphere (actually the plastic like layer underneath it)
Asthenosphere
The seismic wave that causes the most destruction
Surface Waves
The world's most active volcano
Kilauea
When volcanic ash and debris rush down the side of the volcano
Pyroclastic flow
The ________________ are all in line because the Pacific Plate is moving over a stationary hot spot.
Hawaiian Islands
When continental plates pull apart, they can form this.
Ocean Valley
When the earthquake causes wet soil to act more like a liquid
Liquefaction
The "Ring of Fire" is a region of extensive volcanic activity along the edges of the Pacific Ocean. It contains the largest number of active volcanoes in the world. What other geologic event is creating this massive amount of volcanism?
Pacific Plate Subduction
Where two continental plates collide, they push up crust to form mountain ranges
Continental Collision
____________ proposed the theory about seafloor spreading
Harry Hess