Stress
Waves
Measuring Earthquakes
Location
Plate Tectonics
100
The stress that causes rocks to be pushed together
What is Compression?
100
These waves always arrive first from an earthqauke
What are P (primary) waves?
100
This type of instrument measures an earthquake's waves
What is a Seismograph?
100
If a seismograph has strong vibrations, it means the earthquake was strong or this.
What is Nearby?
100
The name of the super continent that existed 300 million years ago
What is Pangea?
200
A large area of flat land elevated above sea level
What is a Plateau?
200
These are the waves created by earthquakes
What are Seismic Waves?
200
This scale measures the magnitude of an Earthquake and give it a number 1-10
What is the Richter Scale?
200
The point on the surface directly above where an earthquake occurs
What is the Epicenter?
200
Scientist who first hypothesized that the plates move
Who is Alfred Wegener?
300
The stress that pushes rocks in opposite directions
What is Shearing?
300
The area under Earth's surface where an earthquake occurs
What is the Focus?
300
This scale rates an earthquake based on the amount of shaking and damage done
What is the Modified Mercalli Scale?
300
Which state would have a higher earthquake risk: Maine, Oregon, or Minnesota?
What is Oregon?
300
This type of plate boundary creates mountains and volcanoes
What is Convergent?
400
The stress that pulls rocks apart
What is Tension?
400
These waves usually cause the most damage to buildings
What are Surface Waves?
400
The number of seismographs needed to detect an earthquake's epicenter
What is 3?
400
This is the name of the circle around the Pacific Ocean that is very active with Earthquakes and Volcanoes
What is the Ring of Fire?
400
A divergent boundary on land creates this
What is a Rift Valley?
500
An upward fold in rock
What is Anticline?
500
Waves travel through Earth carrying _______________ released from an earthquake
What is Energy?
500
The Moment Magnitude Scale measures the amount of this from an earthquake
What is Energy?
500
On a seismograph, this is the part that vibrates when an earthquake occurs
What is the Drum?
500
Long underwater mountain chains
What are Mid-Ocean Ridges?
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