12_Density - water the densest water is formed in fall as...

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Why does ice float? Why does salt ‘melt’ ice on the footpath? And other thrilling mysteries… Definition of density Least dense to most dense = ? What controls density of water Temperature Salinity The distribution of temperature, salinity and density in the ocean.
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Definition of density Density refers to how tightly packed molecules are in a specified space. Expressed as mass per unit volume or g/cm 3 Density is affected by state (gas, liquid, solid), temperature, salinity & pressure
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State changes water density
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Pressure changes water density
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Temperature changes water density
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This picture shows three different  phases of water.  Which is the most  dense? A. B. C.
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In Michigan lakes (pure
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Unformatted text preview: water) the densest water is formed in fall as temperatures begin to drop. When surface water temperatures fall below 4°C, surface water stops sinking to the bottom of the lake and ice can begin to form. Salinity changes liquid water density Sal t ion But does seawater reach its maximum density at 4°C? • The temperature of the maximum density of seawater with a salinity of 24.7‰ is -1.33°C. • BUT WAIT….doesn’t water freeze at 0°C • Not so in the oceans What latitude are the coldest temperatures? a.90° b.60° c.30° d.0° What latitude are the saltiest ocean waters? a.90° b.60° c.30° d.0° What latitude are the densest ocean waters? a.90° b.60° c.30° d.0°...
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