True False
Vibrations within the earth causing earthquakes is called radio waves.
F- Seismic Waves
What kind of fault results in a horizontal shift?
Strike Slip
Which seismic wave is the most destructive?
L-waves
As the height of a tsunami __________ (increase/decrease) the depth ________(increase/decrease)
increases, decreases
What scale is capable of accurately measuring a magnitude 8 earthquake.
Moment Magnitude Scale
Intensity is the measure of the strength released from an earthquake.
Magnitude
What type of stress causes a strike-slip fault?
Shearing
Which wave can only travel through solids?
S-waves
Tsunamis are caused by what?
earthquakes or volanic erputions under the sea
What measures intensity of how bad things were during the earthquake?
Mercalli Scale
The speed of a tsunami gradually increases as the depth of the ocean decreases.
height
_________ are caused by tension forces, which result in a vertical change.
Normal Fault
What is the “Shadow zone?”
Seismic waves cannot pass
What causes the earths outer core to produce a magnetic field?
circulation of liquid iron
The recording of waves on paper is called the
Seismogram
Aftershocks occur after an earthquake and can cause as much damage.
True
___________________ are cracks along which rocks slide.
Faults
are adjustments in the crust after an earthquake
Aftershock
Moho Discontinuity is the boundary between crust and mantle where seismic waves speed up or slow down depending on the ________ of the layers.Moho Discontinuity is the boundary between crust and mantle where seismic waves speed up or slow down depending on the ________ of the layers.v
Density
Which scale measures the amplitude of the earth quakes?
Richter Scale
S-waves are the first waves to hit the surface.
False
P-Waves
Where is the focus with respect to the epicenter?
right below it
Describe the damage of each type of wavev
P-waves- no damage
S-waves- damage if combined with L waves
L-waves- the most damage
What is the difference between a tidal wave and a tsunami?
Tsunami is made from earthquakes or underwater volanic eruptions and tidal waves are caused by the moons gravitational pull
How do scientists tell how far the epicenter is from the seismograph?