Scientists use waves to study the different layers of the earth. Usually, they use seismic waves, which are waves generated by earthquakes or nuclear-test explosions. The seismic waves are bent, sped up, or slowed down, or even reflected when they pass through the earth's layers.

Seismic waves are recorded by a machine called a seismograph, which tells us about the strength and speed of the seismic waves. ... Seismic waves travel at different speeds when they pass through different types of material, so by studying seismograms, scientists can learn a lot about Earth's internal structure.

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2 years ago

The question is on the picture

natali 33 [55]

I believe the answer is the last option

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3 years ago

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Which of the following is the best environment in which to observe impacts of the founder effect? a. the North American great pl

Sergio039 [100]