Vocabulary 1
The study of earthquakes
seismology
A fault is ....
a break in the Earth's crust
If an earthquake is strong, it has great _________
magnitude
Name a place an earthquake has occurred.
Answers vary - California, Haiti, etc.
an earthquake under water creates this
tsunami
The instrument used to measure the strength of an earthquake
seismograph
seismic waves are ____________
what is created when a lot of energy is given off during an earthquake
The 3 types of boundaries are: convergent, divergent, and ___________
transform boundaries
Earthquakes happen when ________________ move
plates
True/False Scientists can predict when an earthquake will occur.
True
The place inside the Earth where the rock first breaks in an earthquake
focus
the point on Earth's surface directly above the focus where an earthquake starts is called the
epicenter
Which type of seismic wave travels along the top of Earth's crust and causes more damage?
Surface waves
Some states, like California, have a high hazard level. What does this mean?
Earthquakes are more likely to happen
What can occur days or minutes before an earthquake as a warning?
foreshocks
When an active fault that hasn't had a strong earthquake in a long time, it is called a _________
seismic gap
the idea that a major earthquake is likely to happen on an active fault where there haven't been many earthquakes for a certain period of time
gap hypothesis
Earthquakes magnitude is measured on this scale.
Richter Scale
The Earthquake in 2010 which caused a lot of damage and made many people homeless happened in _______
Haiti
A. The land rises
B. Rocks slide downhill
C. A crack will close
A. The Land rises
When rock breaks and snaps back to its original shape, it is called __________
elastic rebound
the tracing of earthquake motions that are created by seismographs
seismogram
If an earthquake causes a lot of damage and is felt by many people, the earthquake has high __________
intensity
An earthquake at a magnitude of 10 on the Richter scale ______________________
has never occurred.
Earthquakes kill more people than any other natural disaster. True or False?
True