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Scientists determined that the Earth has layers through studying how seismic waves travel. These seismic waves differed depending on how thick the layer was.
A man named Richard Dixon Oldham discovered that the earth has a core. He determined this by studying the propagation of seismic waves from earthquakes. He hypothesized that the seismic waves had an origin, which he believed came from the center of the earth from a molten core.
The paths of seismic waves
measurement of the amplitude of the largest seismic waves
The magnitude of the earthquake and the distance to the earthquakes epicentre.
Scientists determined that the Earth has layers through studying how seismic waves travel. These seismic waves differed depending on how thick the layer was.
A man named Richard Dixon Oldham discovered that the earth has a core. He determined this by studying the propagation of seismic waves from earthquakes. He hypothesized that the seismic waves had an origin, which he believed came from the center of the earth from a molten core.
Mapping the Earth's internal structure.
scientists use seismic waves to map earths interior by seismographs that measure the times at witch seismic waves arrive at different distances from an earth quake.
The paths of seismic waves
the Mohorovicic (Moho) discontinuity
the Mohorovicic (Moho) discontinuity
By studying how seismic waves travel through the Earth's interior.
measurement of the amplitude of the largest seismic waves
The difference in arrival times of P and S waves.
seismic waves that travel through the earth
A seismograph is an instrument that records movements within the earth. A seismogram is the actual recording that scientists look at when studying earthquakes.