Answer:
Body waves can travel through the Earth's inner layers, but surface waves can only move along the surface of the planet like ripples on water. Earthquakes send out seismic energy as both body and surface waves. The body waves (P and S) and surface waves recorded by a seismometer.
All credit goes to Michigan Technological University.
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Explanation:
Craters are formed by the outward explosion of rocks and other materials from a volcano. Calderas are formed by the inward collapse of a volcano. Craters are usually more circular than calderas. (Calderas may have parts of their sides missing because land collapses unevenly.)
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Answer:
River Nile is the longest river in the world with 4,132 miles.