Ancient Egypt had a social hierarchy. If the hierarchy had five levels, with the pharaoh at the top, at which level were farmers and herders? the second tier, immediately below the pharaoh the third (middle) tier the fourth tier the fifth (bottom) tier

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