In the 1850s, why did many runaway slaves go to canada?

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

Explain one major pattern of cultural interaction between nomadic and sednetary socities in afro eurasia before 1450 ce

Which statement is the most accurately describes the reasons for the seven years war in north america