test review: water and seawater
TRANSCRIPT
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TEST REVIEWWater and Seawater
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Can Polar oceans completely freeze?No
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What is the density of water?1 g/cm3
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Why do you put salt on icy roads or sidewalks?It lowers the freezing point of water.
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What is the percentage of freshwater readily available?Less than 1%.
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What do hydrogen bonds account for?Acts as a solventHas high surface tensionHigh boiling pointHigh heat capacity
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Why can insects walk on water?Surface tension
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The ocean is slow to heat and slow to cool. Why?High heat capacity
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How is the ocean layered?DensityTemperaturesalinity
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True or False?Increasing
heat is an object’s response to an increase in temperature.
False. This is called “latent” heat.
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Which wavelengths of light can penetrate the deepest into the ocean?
Green and blue.
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What determines density of seawater?Salinity and temperature
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What determines a zone of the ocean’s salinity rapidly changing?pycnocline
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What is the percentage of incoming sunlight absorbed by the land and water?
51%
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What is the main carrier of heat between the warm tropics and cold polar regions?The atmosphere.
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Is the speed on sound in water slower or faster than the speed on sound in air?
faster
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What is the average salinity of seawater?34 ppt.
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What are the 2 most abundant elements dissolved in seawater?SodiumChloride
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Acid – high or low value?Low
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What is a solution made of?Ionatom
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Water Cycle