Forces In Earth's Crust
What are the three different types of stress?
What are tension, compression, and shearing
What are the three different kinds of seismic waves?
Seismic Waves cause the seismograph's drum to what?
What is vibrate
Geologists can determine earthquake risk by locating where faults are what?
What is active
What is a force that acts on a rock to change its shape or volume?
What is stress
Most faults occur along what?
What are Plate Boundaries
What are the three commonly used methods for measuring earthquakes?
What are the Mercalli scale, Richter scale, and the Moment magnitude scale.
Scientists measure what near faults?
What are ground movements
Earthquakes are most likely at faults along boundary between two what?
What are plates
What is the shaking results when rocks move inside Earth?
What is an earthquake
What type of fault occurs when tension pulls rocks apart?
What is normal fault
Geologists use these to locate an earthquake's epicenter.
What are Seismic waves
What are the three main instruments scientists use to detect earthquakes?
What are tiltmeters, Creep meters, and GPS satellites
Cause of earthquakes damage include these? Name at least one.
What is shaking, liquefaction, aftershocks, and tsunamis
What is the point beneath the Earth’s surface where rock breaks under stress and causes an earthquake?
What is focus
The forces of plate movement can change a flat plain into what?
What are landforms
The point where all three circles cross is the what?
What is the epicenter
When Seismic waves reach a fault, they what?
What is bounce off it
The best way to protect yourself in an earthquakes is to what.
What is drop, cover, and hold
What is a building mounted on bearing designed to absorb energy of an earthquake?
What is a base-isolated building
What are the three main types of faults?
What are normal faults, reverse faults, and strike-slip faults
To find the exact location of the epicenter, you need what in three different locations?
What are seismographs
When an earthquake shakes the ground, the pen hardly moves because of what?
What is weight
The main danger in earthquakes is what?
What are falling building and objects
What is the stress that stretches rock so that it becomes thinner in the middle
What is Tension