Waves and the Ocean - U.S. Satellite



Lesson 18: Waves and the Ocean Assessment

1. In the wave diagram below, label the

a. Crest

b. Trough

c. Wavelength

2. A wave that travels parallel to the flow of energy is a

a. transverse wave.

b. longitudinal wave.

c. P-wave.

d. magnetic wave.

3. Electromagnetic energy travels in

a. orbital waves.

b. parallel waves.

c. transverse waves.

d. longitudinal waves.

4. While standing on the beach you count 20 waves breaking in 60 seconds. What is the wave frequency? How long is the wave period? Show your calculations.

|[pic] |or |[pic] |

period = 150/30 = 5 seconds/wave

frequency =1/5 = 0.2 waves/second

5. A buoy in the Pacific Ocean reports a dominant wave period of 8 seconds and a wavelength of 32 meters. What is the speed of the dominant wave?

|[pic] |or |speed = wavelength x frequency |

Speed = 32/8 = 4 meters/second

6. As wind blows over the water, wave height increases and

a. wave period and wavelength both increase.

b. wave period decreases and wavelength increases.

c. wave period and wavelength both decrease.

d. wave period and wave frequency increase.

7. Why do species of plants that inhabit sand dunes have extensive root systems?

a. To access freshwater

b. To anchor sand

c. To keep from being washed away by wave action

d. To provide habitat for coastal organisms

8. Which statement is not true of tsunamis?

a. They form as a result of underwater earthquakes.

b. They involve one massive, destructive wave.

c. The wavelength of the wave(s) is extremely long.

d. Energy is transferred from the water to land when the wave hits the shore.

9. Choose one plant and one animal species and describe how they are each adapted to high-energy wave action along the shoreline.

|Points |Criteria |

|4 |Student clearly identifies and describes the specific|

| |adaptations of two organisms that allow them to live |

| |with high-energy wave action. |

|3 |Student identifies and describes the adaptations of |

| |two organisms that allow them to live with |

| |high-energy wave action. |

|2 |Student names and briefly discusses the adaptations |

| |of organisms that allow them to live with high-energy|

| |wave action. |

|1 |Student mentions adaptations of organisms that allow |

| |them to live with high-energy wave action but |

| |includes little or no detail. |

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Crest

Trough

Wavelength

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