For which of the following activities would a geologist use a seismograph?

A) searching for stars in distant galaxies
B) recording plate movements
C) studying the motions of clouds
D) checking for cracks in an oil pipeline

3 answers

And you think it's ... ?

https://www.google.com/search?q=seismograph&oq=seismograph&aqs=chrome..69i57j69i60.2872j0j9&sourceid=chrome&ie=UTF-8
thanks
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