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C ) Seismic waves are not affected by boundaries between earths layers
What scientists learned about Earth by studying seismic waves is “Seismic waves are not affected by boundaries between earth's layers”. The correct answer is C.
Scientists studied the seismic waves to be able to properly understand the Earth’s interior. Seismic waves refer to wave energy that moves through the Earth.
Their movement is also typical or similar to other types of waves like water, light and sound waves.
These waves of energy travel through the earth during earthquakes and cause the ground to vibrate.
A seismograph is the type of machine used to record the speed and strength of Seismic waves. The recordings made available by seismographs are known as seismograms. The machines have made it possible for scientists to understand that the speed at which seismic waves move through the earth is different.
Seismic waves can, however, be divided into two, which include:
Body waves move through the earth’s interior while the surface waves move through the earth’s surface. Surface waves are very important types of seismic waves but they don’t provide information as to what is going on in the Earth’s interior.
Therefore, what scientists learned about Earth by studying seismic waves is “Seismic waves are not affected by boundaries between earth's layers”.
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