Why do daily patterns of the earth repeat themselves

Marine exptoration of oil uses seismic waves to locate oil in the seabed. what is a negative impact from seismic waves on the aquatic ecosystem of the ocean? a.seismic waves kill microoganisms b.seismic waves disrupts the sand and causes seafloor erosion c.seismic waves have virtually no adverse affects on marine life d.seismic waves damage the sonar that dolphins and whales use to orient themselves underwater

Enter the word you received when you completed the northern renaissance art activity.

Due to the red scare, immigrants from these two regions of europe's were strongly opposed by many americans