True, all polygons are closed
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Seismic waves are studied by geophysicists called seismologists. Seismic wave fields are recorded by a seismometer, hydrophone (in water), or accelerometer. The propagation velocity of seismic waves depends on density and elasticity of the medium as well as the type of wave.
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because that is the time of year when the two most important ingredients needed for their formation
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ingredients are warm ocean waters. hope this helps
Answer:
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