The man who first proposed the theory of Continental Drift.
Who is Alfred Wegner
100
Subduction occurs at these plate boundaries.
What are Convergent Boundaries.
100
Earthquakes that are not associated with any volcanic activity occur at ____________ boundaries.
What are TRANSFORM boundaries?
100
The inner core of Earth is in this state of matter.
What is Solid?
100
A volcano that does not occur at a plate boundary is called a ____________.
What is a HOTSPOT?
200
All continents were once part of this supercontinent that began breaking up approximately 250 million year ago.
What is Pangaea?
200
The Himalayas are an example of a mountain range that exists at a Convergent Plate Boundary between Continental Crust and ______________ Crust.
What is Continental?
200
Earthquakes occur below the surface of earth at a point known as the focus. The point on the surface directly above the focus is known as the ____________.
What is the EPICENTER.
200
Earth's interior has remained very hot because of this process.
What is radioactive decay?
The breakdown of heavy atoms in earth's interior.
200
Low viscosity lava that is very low in silica is known as ___________.
What is BASALTIC?
300
This is the reason Wegener's theory was not accepted?
Lack of a mechanism. What could actually push a continent?
300
New oceanic crust is formed at...
What are mid-ocean ridges or divergent plate boundaries.
300
The waves that cause all of the structural damage during an earthquake are called ______________.
What are SURFACE WAVES?
300
The crust and the uppermost mantle make up the tectonic plates and are often referred to as the ____________.
What is the Lithosphere?
300
This type of volcano typically has silica-rich, high viscosity lava flows as well as highly explosive eruptions with pyroclast?
What is a COMPOSITE VOLCANO?
400
List lines of evidence for the Theory of Continental Drift.
This is the smallest number of seismograph readings that are necessary to determine the epicenter of an earthquake.
What is THREE?
400
This type of seismic wave cannot travel through liquids.
What is an S (Secondary) Wave?
400
Volcanoes are unlikely to form at this type of plate boundary.
What is a TRANSFORM BOUNDARY?
500
A volcanic island arc is likely to form at this plate boundary.
What is a convergent boundary between oceanic crust and oceanic crust. The more dense plate will subduct under the less dense plate creating the volcanic island arc and a deep ocean trench.
500
A break in a rock mass along which plate movement occurs is called a _________.
What is a fault.
500
The medium in this type of seismic wave travels perpendicular to the direction in which the wave is travelling.
What is an S (Secondary) Wave?
500
The portion of the upper mantle upon which the lithospheric plates move.