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#### Question 1 1 / 1 pts What is the speed (in meters per second) of a wave with wavelength of 40 meters, traveling over a depth of 30 meters?    * Your answer is a numeric answer only (no text)

###### Biology

Question 1

1 / 1 pts

What is the speed (in meters per second) of a wave with wavelength of 40 meters, traveling over a depth of 30 meters?

* Your answer is a numeric answer only (no text).  Round your answer up to the first decimal place: for example 12.28 will be rounded up to 12.3

Modeling Waves (The equations you need to answer this section are all found in your textbook chapter 10,  the Waves Help file I provided, and in the Guiding Questions)

Question 2

1 / 1 pts

Subsurface waves that form at the boundary between water layers of different densities are called

Reflecting waves

Density waves

Internal waves

Thermohaline waves

Question 3

1 / 1 pts

When does a wave begin to interact with the bottom?

When it is in water that is deeper than ½ its wavelength.

When it is in water that is deeper than  twice its wavelength.

When it is in water that is shallower than twice its wavelength.

When it is in water shallower than ½ its wavelength.

Question 4

1 / 1 pts

The time it takes a wave to move a distance of one wavelength is called the

Wave crest

Wave frequency

Wave period

Wave drift

Question 5

1 / 1 pts

Waves that  break from top to bottom leaving an air filled channel or tube between the crest and the foot of the wave are called plunging waves.  How are these plunging waves formed?

When waves approach a steeply sloping bottom.

When a wave travels from shallow to deep water.

When waves approach a gravel or sandy bottom.

When waves approach a gradually sloping bottom.

Question 6

1 / 1 pts

When would wave refraction occur?

When a wave line approach shore at an angle so different parts of the wave are in different depths of water.

If the wave approaches perfectly parallel to the shore and the sea floor is perfectly uniform.

If the wave is formed within an enclosed basin so that it rocks back and forth rhythmically.

When a wave travelling through cold water encounters warm surface water.

Information can be found in the section Deep-Water Waves Change to Shallow-Water Waves As They Approach Shore, Chapter 10, section 10.6

Question 7

1 / 1 pts

What can be the cause of a rogue wave?

When a wave train encounters a gently sloping bottom made of sand or gravel.

When a shallow water wave suddenly encounters a deep water.

Destructive interference of many wavelengths.

Constructive interference of many wavelengths.

Question 8

1 / 1 pts

Calculate the wave speed (in meters per second) of a tsunami with a wavelength of 180 km (180,000 meters) and period of 15 minutes traveling over the Pacific, which has an average depth of 4 km or 4000 meters.

* Your answer is a numeric answer only (no text).  Round your answer up so there is no decimal: for example 12.7 will be rounded up to 13.

Modeling Waves (The equations you need to answer this section are all found in your textbook chapter 10,  the Waves Help file I provided, and in the Guiding Questions)

Remember, Tsunami are always shallow-water waves.

Question 9

1 / 1 pts

Which below is typical characteristic of a tsunami?

They are harmless to people.

Have long wavelengths.

They move slowly out in the open sea.

They don't interact with the sea floor until they are near shore.

Question 10

1 / 1 pts

The Equilibrium Theory of tides takes into account all of the following EXCEPT

Position of the moon.

Gravitational effect of the sun.

Rotation of the Earth.

Shape of ocean basins and coastlines.

Question 11

1 / 1 pts

Why is it difficult for organisms to live between the high-tide and the low-tide marks (the intertidal zone)?

The wave action is too extreme for organisms to survive.

There is a distinct lack of production and nutrients.

Oxygen levels are very low in this zone.

Organisms are exposed to varying amounts of emergence and submergence.

Question 12

1 / 1 pts

What is the name of the  tidal pattern that has two unequal high tides and two unequal low tides.

Mixed tides (mixed semidiurnal)

Solar tides

Diurnal tides

Semidiurnal tides

Question 13

1 / 1 pts

What has the greatest effect on the tides?

Prevailing wind patterns.

Gravitational attraction of the sun.

The tilt of the earth on its axis.

Gravitational attraction of the moon.

Question 14

1 / 1 pts

How many HIGH tides usually occur in southern California during approximately a 24-hour period ?

4

1

3

2

Question 15

1 / 1 pts

What causes spring tides?

When the Earth is tiled 23.5 degrees away from the sun.

When the earth reaches the spring equinox in its  orbit around the sun.

The linear alignment of the Earth, moon, and sun.

The Earth, moon, and sun are at right angles to each other.