When people alter the natural course of a river to provide irrigation, they are primarily modifiying the a. atmosphere b. hemisphere c. hydrosphere d. lithosphere

What was the aim of impressionist painters? a to portray the lives of the rich, b to express a moment in the lives of ordinary people, c to create formal portraits, d to use classic painting techniques

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

Which facts represent the economic reality the nation faced in 1933? choose all answers that are correct.