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Why Doesn't the Ocean Freeze Over?

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by

shelby owen

on 10 December 2013

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Transcript of Why Doesn't the Ocean Freeze Over?

Does the Ocean freeze?
Seawater
On average, seawater has a salinity of about 3.5% (35 g/L)
seawater freezes at about -1.9 degrees Celsius (28.4 degrees Fahrenheit) because of the salt in it
only the water, not the salt, freezes in oceans creating "sea ice"
seawater is denser than freshwater

Hypothesis
If i take about the same concentration of salt as in the ocean, make my own seawater, and put it in the freezer then it will not freeze.
Experiment
You will need 2 bowls, 8 cups of water, 2 tablespoons of salt, and a freezer
Results
in bowl #1, the freshwater, it completely froze
http://oceanservice.noaa.gov/facts/oceanfreeze.html
label the bowls (one freshwater and one saltwater)
measure out 4 cups of water into each bowl
measure out 2 tablespoons of salt and add it to your saltwater bowl and stir until dissolved
place both bowls into the freezer and let them sit over night
remove bowls in the morning and record results
in bowl #2, the saltwater, there was only a thin ice layer on the top. the rest was still liquid.
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