Chapter 19.2-19.4
True
P-waves are bent when they strike the core
Mass
Suspended from a wire
Seismogram
A paper or computer record of earthwuake vibrations is called a ____
The Ritcher scale is a numerical scale used to describe and earthquakes...
Magnitude
The amount f energy released by an earthquake is measured by its...
Magnitude
False
On seismograms,seismic waves recorded from more distant facilities are closer together than those recorded from facilities close to the epicenter.
True
P-waves travel through Earth's mantle
False
S-waves do not enter the core because they cannot travel through solids.
False
S-waves do not travel through Earth's mantle.
True
Seismic waves change speed and direction when they encounter different materials
True
Seismotologists have reasoned that Earth's outer core must be liquid based on the dissapearance of S-waves.
True
Studies of ow waves reflect deep inside Earth show that Earth's inner core is solid.
False
Surface waves are the first to arrive at a seismic facility
True
The P-wave shadow zone does not recieve direct P-waves
Seismometer
an instrument that records earthquake vibrations
Each whole number increase on the Ritcher scale corresponds to a 32 fold increase
seismic energy
