TEST REVIEWWater and Seawater

Can Polar oceans completely freeze?No

What is the density of water?1 g/cm3

Why do you put salt on icy roads or sidewalks?It lowers the freezing point of water.

What is the percentage of freshwater readily available?Less than 1%.

What do hydrogen bonds account for?Acts as a solventHas high surface tensionHigh boiling pointHigh heat capacity

Why can insects walk on water?Surface tension

The ocean is slow to heat and slow to cool. Why?High heat capacity

How is the ocean layered?DensityTemperaturesalinity

True or False?Increasing

heat is an object’s response to an increase in temperature.

False. This is called “latent” heat.

Which wavelengths of light can penetrate the deepest into the ocean?

Green and blue.

What determines density of seawater?Salinity and temperature

What determines a zone of the ocean’s salinity rapidly changing?pycnocline

What is the percentage of incoming sunlight absorbed by the land and water?

51%

What is the main carrier of heat between the warm tropics and cold polar regions?The atmosphere.

Is the speed on sound in water slower or faster than the speed on sound in air?

faster

What is the average salinity of seawater?34 ppt.

What are the 2 most abundant elements dissolved in seawater?SodiumChloride

Acid – high or low value?Low

What is a solution made of?Ionatom

Water Cycle