Who is the scientist that came up with the theory of "Continental Drift?"
Alfred Wegener
100
What is a break in the earth's crust?
Fault
100
Name two devices that measure earthquakes
Richter Scale
Seismograph
100
This is any type of force that can change the shape or volume of rock
Stress
100
What is a volcano called that is dead, or unlikely to erupt again?
Extinct
200
Approximatley how many inches do the earth's plates move per year?
About 2 inches
200
What is a boundary where two plates slip past each other in opposite directions?
Transform boundary
200
What is the point beneath the earth's surface where rock that is under stress breaks, triggering an earthquake
Focus
200
What is a type of stress that pulls on the crust stretching it out so it becomes thinner in the middle?
Tension
200
What is a weak spot in the crust where molten material, or magma, comes to the surface?
volcano
300
What kind of evidence did Wegener have to support his theory? (3 types)
Fossils, Landform, and Climate
300
Divergent Boundary
A type of plate boundary where two plates move apart, can form rift valleys or trenches
300
What is the point on the surface directly above the focus?
Epicenter
300
What is a type of stress that squeezes rock until it folds or breaks?
Compression
300
What is a live volcano that is erupting, or has shown signs that it may erupt in the near future?
Active Volcano
400
What is the name of the "Super Continent
Pangaea
400
Two plates come together and collide to form which type of boundary?
Convergent Boundary
400
What are vibrations that travel through Earth carrying the energy release during an earthquake (two words)
Seismic Waves
400
What is a type of stress that pushes a mass of rock in two opposite, horizontal directions?
shearing
400
What is a major volcanic belt formed by many volcanoes that rim the Pacific Ocean?
Ring of Fire
500
Why did some scientist reject the theory of "Continental Drift?"
He couldn't prove how the earth's plates moved
500
Plate tectonics is the geological theory that states that pieces of Earth's crust are in constant, slow motion, driven by ___________ currents in the mantle.
Convection Currents
500
Which is the most dangerous type of seismic wave that can destroy buildings?
Surface Waves
500
Any change in the volume or shape of the earth's crust
Deformation
500
What is a sleeping volcano? Scientists believe it will awaken in the future and become active.