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how do geologists learn about Earth's Interior

Earth's interior

carley swartzendruber

on 10 September 2012

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Transcript of how do geologists learn about Earth's Interior

THE QUESTION IS VERY HARD TO ANSWER, because geologist are unable to see deep in side the earths surface. Geologist have used two main types of evidence to learn about Earth's interior: direct evidence from rock samples and indirect evidence from seismic waves. EVIDENCE FROM ROCK SAMPLES!!! Geologists have drilled holes
as deep as 12.3 kilometers into
Earth. The drills bring up samples
of rock. the rocks give geologists
clues about earth's structure and conditions deep inside Earth. volcanoes sometimes blast rock to the surface from depths of more than 100 kilometers which provides more information. Evidence From Seismic Waves Geologists use an indirect method to study Earth's interior. Earthquakes produce seismic waves. Geologists record the seismic waves and study how they travel through Earth. Seismic waves speed and the path they tell about the earths structure. To better understand how seismic waves can reveal Earths interior. Look at ocean waves. Vocab seismic waves- vibrations
that travel through earth carrying the energy released during an earthquake photos
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