Currents Answers

In 1947 Thor Heyerdahl sailed a simple raft from Peru to Polynesia, following the ocean currents for more than 6,000 kilometers. Which statement accurately describes what Heyerdahl proved by this voyage?a.Ancient Peru was settled by people from Polynesia.b.People from ancient Peru were the first settlers of Polynesia.c.It would have been possible for people from ancient Peru to reach Polynesia by following ocean currents.d.Polynesia was settled accidentally when rafts from Peru were carried out by ocean currents.

Compared with surface currents, deep currents area.colder and less dense.c.warmer and denser.b.warmer and less dense.d.colder and denser.

What are the two causes of density in deep current waters? a.Salinity (how much salt) of the water and high temperatures c.Oxygen content of the water and high temperatures . b.Salinity (how much salt) of the water and low temperatures d.Oxygen content of the water and low temperatures

A stream-like movement of ocean water far below the ocean surface is a

Temperature, salinity, and density are factors in the formation of

What force makes cold water sink toward the ocean floor?a.global windsc. gravityb.the sund.the Coriolis effect

How does the Coriolis effect make ocean currents appear to move?a.back and forthc.clockwiseb.in a curved pathd.against the Earth’s rotation

Surface currents are caused bya.floods.c.the wind.b.warm water.d.the equator.

The curved paths of global winds and surface currents are caused bya.the revolution of the Earth.c.warm air near the equator.b.the Coriolis effect.d.continental deflection.

The density of ocean water increases when ita.joins the Gulf Stream.c.gets warmer.b.gets colder.d.turns to ice.