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ENS282 Week 1- The Physical Ocean Flashcards | StudBud
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ENS282 Week 1- The Physical Ocean
ENS282 Week 1- The Physical Ocean
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1
Which of the following contributes least towards the saltiness of the ocean?
Organism decomposition
Rock weathering
Freshwater runoff
Volcanic activity
2
Surface currents
are driven by thermohaline contraction
Occur below the pycnocline
All of the above
move 10% of the ocean's volume
3
Abyssal plains make up ____ of the earth's surface.
60%
33%
90%
70%
4
The net movement of ocean currents due to Eckman transport is ____ degrees to the wind
10
90
60
45
5
Which of the following is NOT an attribute of a western boundary current?
Warm
Significant upwelling
Fast
Narrow
6
Thermohaline circulation drives surface currents, while winds drive clines.
False
True
7
The name of the scientist who proposed that the effects of wind friction on oceans proliferates through ocean layers was
Hayman
Wegener
Eckman
Coriolis
8
What powers plate tectonics?
Mid-ocean ridges
Ocean spreading
An abundance of volcanism
Magma convection currents
9
Gyres are created by wind friction and Eckman transport, modified by continent presence, and move the top 200m of ocean
True
True, but in the Southern Hemisphere only
False
False- it's mostly below the pycnocline
10
Water is a solvent for many compounds. What does not disolve fully in water?
Salts
CO2
Non-polar compounds
Polar compounds
11
Large volumes of seawater regulate temperatures on land.
Only in small ocean basinc (e.g. Mediterranean)
Only in the large ocean basins (e.g. Pacific, Atlantic)
False
True
12
All things being even, and without the presence of continents, tides would....
Occur once per location per day
be mixed semi-diurnal and be highly predictable
be semidiurnal and vary in height according to the position of the Sun
be semidiurnal and the same size
13
Which of the following is not evidence for plate tectonics?
Rock composition (basalt vs granite)
Age of rocks
Sediment depth
Flipping of rock polarity
14
The rise and fall of the tides is a ____ driver of ocean currents.
Secondary
Insignificant
Primary
Tertiary
15
Which of the following does not affect the colour of sea water?
Nutrient concentration
Cloudiness
Dissolved oxygen concentration
Angle of the sun
16
The coriolis effect is driven earth's circulation and causes wind to rotate clockwise in the northern hemisphere
True
False
17
Spring tides occur
when the sun and the moon's gravitational pull are not aligned
when the sun and the moon's gravitational pull are aligned
Twice per day
During quarter moons
18
Centrifugal force drives a tidal bulge
Towards the Sun
Centrifugal force- What...?
On the far side of the Moon
On the near side of the Moon
19
High cohesion between water molecules causes
High surface tension
Hydrogen-oxygen bonds
Reduced wiking effects
Low surface tension
20
What percentage of seawater is salts?
0.34%
96.5%
9.65%
3.34%
