Plate boundary where plates move away from each other.
What is divergent boundary
100
Where do earthquakes most frequently occur?
What is along fault lines.
100
What is the outermost layer of the earth?
What is the lithosphere or crust.
100
What scale is used to measure earthquakes based on the amplitude of their strongest wave?
What is Richter Scale
200
What do we call the large supercontinent that Wegener believed existed 200 million years ago?
What is Pangea
200
Plate boundary where the plates move towards each other
What is Convergent Boundary
200
What is the earthquake/volcano prone area that extends around the Pacific Ocean from Asia, North America, and South America
What is the Ring of Fire
200
Magma is found ________ the earth, and lava is when magma reaches the __________.
What is inside/surface.
200
What scale measures earthquakes based on damage and level of ground shaking?
What is Mercalli Scale
300
Alfred Wegener gave 3 pieces of evidence to prove his theory. Give me one of them.
What is 1. Matching Fossils 2. Matching Coastlines 3. Matching Rocks/Mountains
300
Plate boundary where the plates slide past each other horizontally
What is transform boundary
300
The release of energy associated with an earthquake is called elastic __________.
What is rebound.
300
Solid materials that are coming out of a volcano
What are pyroclasts
300
What piece of equipment is used to measure the earthquake waves?
What is a seismograph.
400
Wegener's theory only had one hole. That hole was that he could not come up with a _____________ that would cause the continents to drift.
What is Force/Mechanism
400
What is it called when two plates collide and the denser plate slides underneath the less dense one.
What is subduction.
400
Point of origin of an earthquake
What is focus.
400
Resistance to flow is known as _______.
What is viscosity.
400
Each step up on the Richter scale equals a difference in _______ times.
What is 10 times.
500
The Seafloor Spreading Hypothesis explained that the seafloor must be spreading or diverging. This came about by discovering a ______________ wrapped around Earth.
What is Mid-Ocean Ridge.
500
What actually drives the motion of the earth's plates?
What is thermal energy from convection currents.
500
The point on the Earth’s surface, directly above the focus
What is epicenter
500
A volcano with a high gas content has a very ___________ eruption.
What is violent/explosive/intense.
500
What is the fault line located closest to us here in O'Fallon?