The person who suggested that all the continents were all connected as one large landmass
Who is Alfred Wegener
The large landmass that means "all land" that was a supercontinent
What is Pangaea
A steep-walled depression around a volcano's vent. It is the vent a the top of the volcano
What is a crater
The scale that that we use to measure earthquakes on. It is based on the height of the lines on a seismograph
What is the Richter Scale
Intrusive igneous rock forms in this way
What is beneath the surface of the earth
The Hawaiian Islands were formed as a result of this
What is a hot spot
The seismic wave that causes the most destruction
What is secondary waves
Where is the world's most volcanically active area?
What is the Ring of Fire?
When volcanic ash and debris rush down the side of the volcano
What is pyroclastic flow
Which island was covered in volcanic ash
What is Vesuvius?
Where two continental plates collide, they push up crust to form mountain ranges
What is a convergent boundary
____________ proposed the theory about seafloor spreading
Who is Harry Hess