1 What geologic process released large amounts of water vapor into Earth's early atmosphere?A) precipitation as ice, water, or snow B) melting of glacial ice C) movement of ocean currents D) volcanic eruptions 2 When did the first modern oceanographic expedition occur?A) early 1950s B) 1500s C) late 1800s D) early 1800s 3 What type of technology is used to map the ocean floor?A) GPS B) submarines C) sonar D) UV radiation 4 During relatively warm times of Earth's geologic history, the volume of glacial ice was __________ and sea level was __________.A) high, high B) low, high C) low, low D) high, low 5 How are seas different from oceans?A) Seas are deeper and in lower latitudes. B) Seas support a wider variety of marine life. C) seas are larger. D) Seas are smaller and mostly landlocked. 6 The velocity of sound in water is __________.A) 1454 m/s B) 1,000,000 m/s C) 140 m/s D) 4500 m/s 7 Today, water vapor that is added to Earth's atmosphere is destroyed by __________.A) the ozone hole B) X rays C) ultraviolet radiation D) the greenhouse effect