Currents EDGENUITY Quiz

  1. Which of these events happens first in Earth’s polar regions?
  1. The dense water sinks.
  2. The water travels as a deep current.
  3. Water molecules move closer together.
  4. Cold air chills water molecules.
  1. What are the two causes of density in deep current waters?
  1. Salinity (how much salt) of the water and high temperatures.
  2. Salinity (how much salt) of the water and low temperatures.
  3. Oxygen content of the water and high temperatures.
  4. Oxygen content of the water and low temperatures.
  1. What is the pycnocline?
  1. The boundary between the surface water and deep water.
  2. The changing level of ocean salinity.
  3. The places where two surface currents meet.
  4. The boundary north of which water moves clockwise and south of which water moves counterclockwise.
  1. 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?
  1. Ancient Peru was settled by people from Polynesia.
  2. People from ancient Peru were the first settlers of Polynesia.
  3. It would have been possible for people from ancient Peru to reach Polynesia by following ocean currents.
  4. Polynesia was settled accidentally when rafts from Peru were carried out by ocean currents.
  1. The Gulf Stream is an example of a(n) ______current.
  1. Surfacec. deep
  2. Coriolis effectd. Antarctic
  1. What force makes cold water sink toward the ocean floor?
  1. Global windsc. gravity
  2. The sund. the Coriolis effect
  1. How does the Corioliseffect make ocean currents appear to move?
  1. Back and forthc. clockwise
  2. In a curved pathd. against the Earth’s rotation
  1. What term describes the movement of ocean water between surface and deep water?
  1. Pycnocliningc. The Coriolis effect
  2. Conveyor belt cyclingd. none of the above
  1. A stream-like movement of ocean water far below the ocean surface is a
  1. Gravitational currentc. surface current
  2. Coriolis currentd. deep current
  1. What happens to an ocean current when it hits a continent?
  1. It changes direction. c. It moves toward the Equator
  2. It moves toward the poles. d. It speeds up.
  1. How much of the oceans’ water is part of the deep waters?
  1. 50%c. 99%
  2. 25%d. 90%
  1. The density of ocean water increases when it
  1. Joins the Gulf Streamc. gets warmer
  2. Gets colderd. turns to ice
  1. Which currents carry warm water away from the equator?
  1. Deep currentsc. surface currents
  2. Evaporationd. freezing
  1. The curved paths of global winds and surface currents are caused by
  1. The revolution of the Earthc. warm air near the Equator
  2. The Coriolis effectd. continental deflection
  1. Temperature, salinity, and density are factors in the formation of
  1. Wind currentsc. electric currents
  2. Deep currentsd. surface currents.
  1. The Gulf Stream Current is deflected by North America, causing the current to change direction.

What is this concept called?

  1. Continental deflectionc. Pycnocline
  2. The Coriolis effectd. Conveyor belt cycling
  1. Surface currents are caused by
  1. Floodsc. the wind
  2. Warm waterd. the equator
  1. Ocean currents flow from east to west near the
  1. Gulf Streamc. equator
  2. Polesd. global winds
  1. In what direction do global winds and currents flow near the equator?
  1. East to westc. toward the land
  2. West to eastd. north to south
  1. Compared with surface currents, deep currents are
  1. Colder and less densec. warmer and denser
  2. Warmer and less densed. colder and denser
  1. What three factors control surface currents?

1-

2-

3-

  1. What are three factors that control deep currents?

1-

2-

3-