What metaphor did Winston Churchill use to describe the forcible rise to peer of communist nations in central and Eastern Europe? A) brick wall
B) impenetrable shield
C) communist trench
D) iron curtain

On the graph, the bottom horizontal line represents

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

At the end of civil war, which reconstruction plan called for a military occupation of the south ? a. lincoln's b. radical's c. johnson's