FSU Oceanography Chapter 8 (most) Questions

8.1: Judge the following sentence: Ocean waves are not considered body waves BECAUSE they transmit energy through the upper part of the ocean near the interface between the atmosphere and the ocean.

The assertion is incorrect, but the reason is correct.

8.2: Judge the following sentence: The circular orbit of wave motion returns the floating object to its exact original position BECAUSE the half orbit in the trough is at the same velocity as the crest half of the orbit.

Both the assertion and the reason are incorrect.

8.3: Judge the following sentence: The main cause of rogue waves is theorized to be an extraordinary case of destructive wave interference BECAUSE rogue waves are the suspected cause of many of the approximately 1,000 sinkings that occur each year.

The assertion is incorrect, but the reason is correct.

8.3: Waves from separate sea areas move away as swell and produce an interference pattern when they come together. If Sea A and Sea B have wave heights of 3 meters, what would be the height of waves resulting from destructive interference?

0 meters

8.3: In the open ocean, 1 wave in ________ will be three times as high as the height of the wave average.

1175

8.4: Judge the following sentence: The same waves break against both headlands and in nearby bays, but their energy is different BECAUSE wave reflection causes the distribution of wave energy to change between them.

The assertion is correct, but the reason is incorrect.

8.4: Judge the following sentence: Board surfers tend to avoid plunging breakers BECAUSE they break right at the shoreline.

Both the assertion and the reason are incorrect.

8.1: What generates the most ocean waves?

Wind blowing across the surface

8.1: Tidal movement, turbidity currents, wind stress, and even passing ships at the surface create ________ waves.

internal

8.1: Most ocean waves form as a result of:

winds blowing across the ocean surface.

8.2: Based on the graph, what is the approximate period of a deep-water wave with a speed of 20 meters per second?

13 seconds

8.2: What is the speed in meters per second of a deep water wave with a wavelength of 3.5 meters?

2.34 meters per second

8.2: The longer the ________, the faster a deep-water wave travels.

wavelength

8.3: Waves from separate sea areas move away as swell and produce an interference pattern when they come together. If Sea A has wave heights of 2 meters and Sea B has wave heights of 5 meters, what would be the height of waves resulting from destructive interference?

3 meters

8.3: Waves from separate sea areas move away as swell and produce an interference pattern when they come together. If Sea A has wave heights of 1.5 meters and Sea B has wave heights of 3.5 meters, what would be the height of waves resulting from constructive interference?

5 meters

8.3: Rogue waves are created along the “Wild Coast” off the southeast coast of ________, where the Agulhas Current flows directly against large Antarctic storm waves.

Africa

8.3: In the open ocean, 1 wave in ________ will be over twice the height of the wave average.

23

8.4: Which type of breaker forms when the ocean bottom has an abrupt slope?

Surging breaker

8.4: Which type of breaker has a curling crest that moves over an air pocket?

Plunging breaker

8.5: Which is the least frequent cause of a tsunami in recent centuries?

Meteorite impacts

The majority of tsunami are caused by underwater ________.

fault movement

8.1: ________ waves also known as side-to-side waves.

Transverse

8.2: The time it takes one full wave to pass a fixed position is called the ________.

wave period

8.2: You live on an island in the Pacific. An earthquake of magnitude 8.5 off the coast of Japan, 8000 km away, generates a tsunami with a wavelength of 200 km. The average water depth between your island and Japan is 4900 m. If a tsunami warning is issued for your island, how many hours will you have before the waves arrive?

10.14 hours

8.3: The largest wind-generated waves tend to be associated with the:

westerlies

8.4: If a surfer wishes to have a really long ride, what type of wave should he or she look for?

spilling breakers

8.5: What does DART stand for?

Deep-ocean Assessment and Reporting of Tsunamis

8.5: A tsunami may result from:

tectonic activity on the seafloor.