1.  What type of ocean motion is influenced by the moon and the sun?

  1. Density currents c. Waves
  2. Surface currents d. Tides

2.  The amount of salt in a given amount of water is:

  1. Coriolis effect c. Density current
  2. Salinity d. Surface current

3.  This occurs when circulation in the ocean brings deep, cold water to the ocean surface:

  1. Rotation of the earth c. Coriolis effect
  2. Density d. Upwelling

4.  The vertical distance between the crest and trough of a wave is called ______.

  1. Crest C. Wavelength
  2. Wave height D. Wave period

5.  What causes the current to curve instead of moving in straight lines?

  1. The moon’s gravity c. Coriolis effect
  2. Waves height d. Density currents

6.  When the sun, moon, and earth are aligned (in a straight line), you have a

  1. Density current c. Spring Tide
  2. Neap tide d. Distance the wind blows across the water

7.  Surface currents are caused by

  1. Wind that blows every now and then c. the moon’s gravitational pull
  2. Wind that blows in regular directions d. differences in salinity and temperature

8.  The ocean water off the coast of Maine in the United States is not as salty as the ocean water off the coast of Africa. Which of the following factors could be responsible for this difference in salinity?

  1. Climate c. Ocean Pollution
  2. Marine life d. Underground formation

9.  The sun’s energy causes a large amount of ocean water to evaporate. This increases the salinity of the water at the ocean’s surface, causing the water to become denser and sink to the ocean floor. This will MOST likely trigger

  1. A surface current. c. El Niño
  2. A spring tide. d. A deep current.

10.  Look at the figure below. It shows a bottle George threw into the water to explore the effect of waves on floating objects. As he watches the interaction of the waves and the bottle, which of the following is the most valid conclusion about what is moving across the ocean?

  1. The waves are moving across the ocean.
  2. The bottle is moving across the ocean.
  3. The water is moving across the ocean.
  4. The bottle and water are moving together across the ocean.

11.  The lowest point of a wave is the:

  1. Crest c. Trough
  2. Wavelength d. Frequency

12.  The highest point of a wave is:

  1. Crest c. Trough
  2. Wavelength d. Frequency

13.  ______water rises and ______water sinks.

  1. Warm, cold
  2. Cold, warm

14.  Currents in the Northern hemisphere move in a ______direction.

  1. Clockwise c. From North to South
  2. Counterclockwise d. From South to North

15.  The distance between two wave crests is called the ______.

  1. Wavelength c. Period
  2. Wave height d. Fetch

16.  As energy moves in waves through the water, the water moves

  1. In waves toward shore. c. In the direction of the waves.
  2. In a small vertical circle. d. Against the current.

17.  Why do waves increase in height as they approach the shore?

  1. The waves are forced into narrow inlets of land.
  2. The water particles speed up as they approach land.
  3. The water’s density decreases because it’s warmer near the shore.
  4. The waves begin to interact with the ocean floor.

18.  Which statement describes what is happening at high tide?

  1. The moon is revolving more quickly than the Earth is rotating.
  2. The moon’s gravity is dragging water away from the equator.
  3. The moon’s gravity is pulling ocean water into a bulge.
  4. The sun’s gravity pulls with more force than the moon’s gravity.

19.  When a wave reaches a beach or coastline, it releases a burst of energy that generates a current, which runs parallel to the shoreline. This type of current is called a ______.

  1. Deep Ocean Current c. Tides
  2. Longshore Current d. Rip Current

20.  Spring tides and neap tides occur in patterns governed by

  1. Changes in the force of the Earth’s gravity.
  2. The type of ocean currents near where the tides occur.
  3. Whether the gravity of the sun or moon exerts a stronger pull.
  4. The relative positions of the Earth, moon, and sun (the phases of the moon).