So, Geologists record the seismic waves and study how they travel through Earth. The speed of seismic waves and the paths they take reveal the structure of the planet. By using the data of seismic waves, geologists have learned that Earth's interior is made up of several layers.
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Answer:
Geologists cannot look inside the Earth.
So, Geologists record the seismic waves and study how they travel through Earth. The speed of seismic waves and the paths they take reveal the structure of the planet. By using the data of seismic waves, geologists have learned that Earth's interior is made up of several layers.