Name:______Date:______Pd:_____

Currents, Waves, and Tides

Multiple Choice

Identify the choice that best completes the statement or answers the question.

____1.Surface currents are formed by

a. / the moon's gravity. / c. / Global wind.
b. / the sun's gravity. / d. / increased water density.

____2.The gravitational pull that the moon exerts on Earth is

a. / greater on solids than liquids. / c. / responsible for longshore currents.
b. / the main cause of high and low tides. / d. / responsible for tsunamis.

____3.Streamlike movements of water that occur at or near the surface of the ocean caused by wind are called

a. / jet currents. / c. / surface currents.
b. / Coriolis currents. / d. / deep currents.

____4.Which factor is responsible for moving ocean water east to west near the equator?

a. / global winds / c. / continental deflections
b. / salinity / d. / temperature

____5.Streamlike movements of ocean water far below the surface caused by density are called

a. / jet currents. / c. / surface currents.
b. / Coriolis currents. / d. / deep currents.

____6.Which factor affects the movement of deep currents?

a. / Increase in salinity / c. / continental deflection
b. / the Coriolis effect / d. / global winds

____7.Where do deep currents form?

a. / where the Coriolis effect is strongest
b. / where Earth's magnetic field is strongest
c. / where water density increases
d. / where water density decreases

____8.____ carry warmer, less dense water from the equatorial regions to polar regions. (Ex. Gulf Stream)

a. / Trade currents / c. / Surface currents
b. / Coriolis currents / d. / Deep currents

Examine the diagram below and answer the questions that follow.

____9.Which number indicates a wavelength?

a. / 1 / c. / 3
b. / 2 / d. / 4

____10.Which number indicates a crest?

a. / 1 / c. / 3
b. / 2 / d. / 4

____11.Which number indicates a wave height?

a. / 1 / c. / 3
b. / 2 / d. / 4

____12.Which number indicates a trough?

a. / 1 / c. / 3
b. / 2 / d. / 4

____13.Which statement best describes the movement of ocean waves?

a. / Water remains in the same place as waves (energy) travel through it.
b. / Water moves because there is a difference in density of the water creating a wave,
c. / Water moves across the ocean's surface.
d. / All of the above
Wa

Examine the illustration below, and answer the questions that follow.

____14.Which tide occurs at 1 and 3?

a. / low tide / c. / long tide
b. / high tide / d. / neap tide

____15.Which tide occurs at 2 and 4?

a. / low tide / c. / long tide
b. / high tide / d. / spring tide

____16.If the sun were positioned above 2, at right angles to 1 and 3, what kinds of tides would occur?

a. / high tides / c. / spring tides
b. / neap tides / d. / low tides

____17.Which of the following best describes the water found in the deep currents of the Atlantic Ocean?

a. / cold with high salinity / c. / warm with high salinity
b. / cold with low salinity / d. / warm with low salinity

____18.Deep Atlantic currents are formed largely as a result of

a. / erosion by surface winds. / c. / the rotation of the Earth.
b. / heating of surface water. / d. / denser water sinking.

Completion

Complete each statement.

Examine the diagram below and answer the questions that follow.

19.A ______tide is produced when the Earth, moon, and sun are aligned as in the diagram above.

  1. Neap Tide
  2. Spring Tide
  3. Low Tide
  4. High Tide

Examine the diagram below and answer the questions that follow.

20. What kind of tide (spring or neap) will occur when the moon is at position F?

A) spring

B) neap

21. How does the Gulf Stream affect climate?

a.it moves cold water around the Gulf of Mexico

b. it moves warm water from the equator to along the eastern coast of the U.S.

c. it moves cold water from the equator to the poles

d. it moves warm water from the poles to the equator

22. Which of the following BEST explains why there are tides in Earth’s oceans?

  1. The rotation of Earth make the oceans bulge away from the planet
  2. Gravity from the moon and the sun pulls more on water at certain times
  3. The currents in the ocean change the depth of the water
  4. The sun makes the water in the ocean become warmer and expand

23. In which direction do most warm currents move?

  1. Away from the Earth’s poles
  2. Away from Earth’s equator
  3. Away from cold currents
  4. In the same direction as waves

Currents, Waves, and Tides Retake

Answer Section

MULTIPLE CHOICE

1.ANS:CPTS:1DIF:IOBJ:14-1.1

2.ANS:BPTS:1DIF:IOBJ:14-3.1

3.ANS:CPTS:1DIF:IOBJ:14-1.1

4.ANS:APTS:1DIF:IOBJ:14-1.1

5.ANS:DPTS:1DIF:IOBJ:14-1.2

6.ANS:APTS:1DIF:IOBJ:14-1.3

7.ANS:CPTS:1DIF:IOBJ:14-1.2

8.ANS:CPTS:1DIF:IOBJ:14-1.3

9.ANS:BPTS:1DIF:IIOBJ:14-2.1

10.ANS:APTS:1DIF:IIOBJ:14-2.1

11.ANS:DPTS:1DIF:IIOBJ:14-2.1

12.ANS:CPTS:1DIF:IIOBJ:14-2.1

13.ANS:APTS:1DIF:IIOBJ:14-2.2

14.ANS:BPTS:1DIF:IIOBJ:14-3.2

15.ANS:APTS:1DIF:IIOBJ:14-3.2

16.ANS:BPTS:1DIF:IIOBJ:14-3.2

17.ANS:APTS:1DIF:IIOBJ:14-1.3

18.ANS:DPTS:1DIF:IIOBJ:14-1.3

COMPLETION

19.ANS:spring

PTS:1DIF:IIOBJ:14-3.2