8th Grade - Chapter 14 - 5th Edition

Which of the following are produced primarily by gravity?

• waves
• currents
• gyres
• tides

What usually has the greatest influence in causing tides?

• the earth’s core
• the moon
• the sun
• the weather

Which of the following is the best explanation for tides?

• Winds push water to one side of the ocean basins
• The tidal bulge moves around the earth, causing high and low tides
• Upwelling and downwelling create high and low tides
• the earth moves under the tidal bulge to form high and low tides.

How many tides do most coasts experience in a typical twenty-four-hour period?

• one low and one high
• two lows and one high
• one low and two highs
• two lows and two highs

Which of the following is not an advantage of tidal power generation?

• Tides are driven by gravity, so tidal power generation is inexhaustible
• Tides occur regularly due to astronomical influences, so tidal power generation is reliable
• Tidal dams must be designed to allow boats and ships to pass
• Tidal generation facilities do not produce any kind of waste products, so they are nonpolluting

Tags

NGSS.HS-ESS3-4

NGSS.HS-ETS1-3

Ocean navigation is most affected by which of the following?

• waves
• currents
• gyres
• tides

Tags

NGSS.MS-ESS2-6

Which of the following combines the influences of the Coriolis effect, current speed, and water depth to change the direction of a current?

• coastal downwelling
• density currents
• the Ekman spiral
• oscillation

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NGSS.MS-ESS2-6

Water that is forced down by downwelling typically has ___ than surrounding waters.

• more nutrients but less oxygen
• more oxygen but less nutrients
• more nutrients and more oxygen
• less nutrients and less oxygen

Which of the following would have the least effect on subsurface currents?

• downwelling
• the Ekman spiral effect
• prevailing winds
• density differences

Tags

NGSS.MS-ESS2-6

Which of the following currents are unrelated to thermohaline currents?

• countercurrents
• density currents
• subsurface currents
• All of these are related to thermohaline currents