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Tides

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quiz covering tides from oceanography course at UWF
Jo O'Bar
Quiz by Jo O'Bar, updated more than 1 year ago
Jo O'Bar
Created by Jo O'Bar about 6 years ago
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Resource summary

Question 1

Question
What are tides?
Answer
  • Periodic, short-term changes in the height of the ocean surface at a particular place
  • The constant waves that lap up on a coast.
  • A laundry detergent
  • A yummy snack. (No. just no.)

Question 2

Question
What causes tides?
Answer
  • The gravitational force of the Moon, Sun, and Earth
  • Wind
  • Water Displacement
  • Dirty laundry

Question 3

Question
Tide waves are the [blank_start]longest[blank_end] waves on earth: their wavelength is [blank_start]half[blank_end] of the Earth's circumference. These waves are known as [blank_start]forced[blank_end] waves.
Answer
  • longest
  • shortest
  • half
  • 1/3
  • 1/10
  • 2/3
  • forced
  • natural
  • rogue

Question 4

Question
The moon's gravity [blank_start]attracts[blank_end] the ocean. Then the Motion of the Earth around the [blank_start]center of mass[blank_end] of the Earth-moon system causes a [blank_start]bulge[blank_end] on the side of the earth [blank_start]opposite[blank_end] the moon. Combined, this creates two [blank_start]bulges[blank_end].
Answer
  • attracts
  • repels
  • center of mass
  • midpoint
  • edge
  • bulge
  • divot
  • bulges
  • divots
  • opposite
  • facing

Question 5

Question
[blank_start]High tides[blank_end]: the bulges are the crests of the planet-sized waves [blank_start]Low tides[blank_end]: the troughs, the area between the bulges
Answer
  • High tides
  • Low tides

Question 6

Question
Label the image
Image:
2018 13 11 15 01 20 (binary/octet-stream)
Answer
  • Island exposed
  • Island submerged (evening)
  • Island high & dry
  • Inertia bulge
  • Gravity bulge
  • Island submerged (morning)

Question 7

Question
Lunar tides:
Answer
  • tides caused by gravitation & inertial interaction of the moon and Earth
  • tides caused by gravitation & inertial interaction of the sun and Earth
  • tides caused by Luna Lovegood, because she's great

Question 8

Question
In a 24h solar day, the moon moves [blank_start]12.2[blank_end] degrees eastward. The earth must rotate another [blank_start]50[blank_end] minutes to again place the moon at the highest position.
Answer
  • 12.2
  • 50
  • 10.2
  • 21.2
  • 50
  • 12.2
  • 40
  • 10

Question 9

Question
The sun has a greater effect on Earth's tide than the moon.
Answer
  • True
  • False

Question 10

Question
[blank_start]Spring tide[blank_end]: when earth, moon, and sun are all in a line. These are [blank_start]additive[blank_end], and correspond to the [blank_start]new and full[blank_end] moons. [blank_start]Neap tide[blank_end]: When earth, sun, and moon form a right angle. Tide [blank_start]diminishes[blank_end] the lunar tide, and correspond with the [blank_start]quarter[blank_end] moons.
Answer
  • Spring tide
  • additive
  • new and full
  • Neap tide
  • diminishes
  • quarter

Question 11

Question
Land masses obstruct tidal crests, diverting and [blank_start]slowing[blank_end] movement. This causes different patterns in the arrival of tidal crests and is influenced by [blank_start]basin shape[blank_end].
Answer
  • slowing
  • quickening
  • basin shape
  • water depth
  • basin depth
  • salinity

Question 12

Question
[blank_start]Semidiurnal[blank_end] tides: two high tides and two low tides of nearly equal level each lunar day [blank_start]Diurnal[blank_end] tides: on high and one low [blank_start]Mixed semidiurnal[blank_end] tides: successive high tides or low tides are of significantly different heights in the lunar day
Answer
  • Semidiurnal
  • Diurnal
  • Mixed semidiurnal

Question 13

Question
Amphidromic points:
Answer
  • nodes at the center of ocean basins, no-tide points
  • nodes at the center of ocean basins, high-tide points

Question 14

Question
Tidal ranges increase with increasing distance from amphidromic points
Answer
  • True
  • False

Question 15

Question
Water flow into or out of bays and harbors is known as...
Answer
  • tidal current
  • tidal flow
  • waves
  • tidal waves

Question 16

Question
[blank_start]Flood current[blank_end]: water rushing into an enclosed area because of the rise in sea level as a tide crest approaches [blank_start]Ebb current[blank_end]: water rushing out because of the fall in sea level as the tide trough approaches [blank_start]Slack water[blank_end]: a time of no currents, occurs at high and low tides when the current changes direction
Answer
  • Flood current
  • Ebb current
  • Slack water
  • Tide current

Question 17

Question
Tidal friction is gradually slowing the Earth's rotation.
Answer
  • True
  • False

Question 18

Question
What is the intertidal zone?
Answer
  • The zone between the high tide and low tide
  • The zone in the middle of the high tide where there is a high concentration of life
  • The part of the beach where the water reaches during high tide, but not low tide
  • The final frontier

Question 19

Question
Check all that apply to organisms in the intertidal zone
Answer
  • Sessile organisms are emerged and submerged
  • Migrate with the tide
  • Triggers spawning
  • Triggers mating
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