Who led groups of African Americans out the south and settled in Kansas after reconstruction

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

What were some effects in world war 1 in europe ? ( and only in europe)

The ideas contained in the declaration of independence was most influenced by a. absolute monarchy b. the federal system c. anti-authoritarianism d. the social contract theory