This supercontinent was formed about 225 million years ago.
What is Pangaea?
100
This is the reason plates converge, diverge, subduct and strike-slip (transform boundary).
What are convection currents?
100
This seismologist first proposed the theory of continental drift.
Who is Alfred Wegener?
100
This device is what's used for measuring the intensity, duration, and time that an Earthquake occured at.
What is a seismometer?
100
You are currently located on this layer of the earth.
What is the crust?
200
The Great Rift Valley in Africa is an example of this type of plate boundary.
What is a divergent boundary?
200
Tectonic plates have converged for hundreds of millions of years to form this tall peak.
What is a mountain?
200
He created the Richter Scale.
Who is Charles Richter?
200
Luigi Palmeri invented a seismometer that used this and was the first to record the time, duration and intensity of an Earthquake.
What is mercury?
200
There are _____ layers of the earth
What is four?
300
The Pacific Plate is an example of this type of tectonic plate.
What is an oceanic plate?
300
These are created when tectonic plates subduct.
What are volcanoes?
300
This seismologist proposed the idea of convection currents to back up the theory of continental drift.
Who is Arthur Holmes?
300
Boris Galtizen invented the this type of seismograph.
What is electromagnetic?
300
This layer is plastic like and located on top of the mantle, but below the crust
What is the upper mantle?
400
This tragic event shook the great city of San Francisco in 1906.
What is the San Francisco Earthquake?
400
As liquids heat up, they rise, and when they cool down, they fall down. What is this called?
What are convection currents?
400
This seismologist invented and used the first seismometer.
Who is John Milne?
400
Filippo Cecchi built the first seismograph which recorded this and what is considered by many as the first true seismograph.
What is time?
400
This layer is liquid and part of the core.
What is the outer core?
500
The San Francisco Earthquake was a result of the San Andreas's fault activity which is this type of fault.
What is a strike-slip fault?
500
When oceanic plates converge, it creates underwater phenomena known as what?
What are volcanoes, underwater mountains and seafloor spreading?
500
This seismologist was described as Ireland's 'father of seismology.'
Who is Robert Mallet?
500
Emil Wiechery developed a seismometer with this which increased the accuracy of the device during the whole Earthquake instead of going haywire after the first few 'waves.'
What is damping?
500
Andrija Mohorovii discovered a between this layer and another one.