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A8 Science Ch 14

Chapter 14 Test

QuestionAnswer
Give a reason why the Great Pacific Ocean Garbage Patch is a real problem. The chemicals inside the trash can poison fish.
What are the 3 principle ways the ocean moves? 1. Tides 2. Currents 3. Waves
What is the main cause of twice-daily tides around the world? The moon's gravity acting on the earth and its oceans
What are the higher than usual tides that form when the sun's and moon's gravitational pulls work together? Spring Tides
Discuss one advantage of using tides to generate electricity. They are extremely advanced and reilable, but can only work in a few places in the world.
True or False: All coast lines experience a high and low tide for a little more than 12 hours apart. True
What two main factors control the speed and direction of major ocean surface currents? 1. Prevailing wind 2. Corriolis Effect
What is upwelling? Upwelling happens when deep water is forced upward from the bottom of the ocean.
Why are downwelling currents important to marine life in the abyssal zone? Downwelling currents carry oxygen from the ocean's surface into the deep regions of the ocean basins, something that deep ocean life needs to live.
Name 3 conditions that allow gravity to produce subsurface currents. 1. Temperature 2. Selenity 3. Sea level
True or False: Water enters the Mediterranean Sea as a surface current and leaves that basin as a bottom-density current True
How does mechanical energy move along the surface of the ocean? Mechanical energy moves along the surface of the ocean becuase of waves.
The energy of a wave is related to what wave property? Height
What causes most surface waves? Winds
What two kinds of currents can occur as ocean waves come ashore? Rip Currents and Longshore
True or False: According to the 1/7 wave steepness rule, a wave with a wavelength of 25m and a wave height of 3m is stable. True
What conditions within the ocean allows the formation of internal waves? Internal waves can form between two layers of seawater with significantly different densities.
True or False: Ocean tidal bulges are actually waves with extremely long wavelengths. True
True or False: Deep sea currents are usually in the opposite direction from surface currents. False
True or False: The amount of energy in an ocean wave is directly related to the length and speed of the wave False
What is upwelling? Upwelling is the movement of dense, cold salty water from the abyssal regions of the oceans.
What is downwelling? Downwelling happens when the sea level is higher than average.
What is a wavelength? The distance between the abyssal regions to the surace.
What is a wave base? The deepest depth of the ocean.
Created by: Russman
 

 



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