CH 7 Flashcards
Where do the salts from the ocean come from and where do they go?
Run off from continents and mid ocean ridges and seamounts(excess volatiles)
What are excess volatiles?
A compound found in the ocean and atmosphere in quantities greater than can be accounted for by the weathering of surface rocks.they are non-weathered
What is meant by our oceans being in chemical equilibrium?
Supply rate equals removal rate
What do salts do to the heat capacity, freezing point and evaporation rates of water?
Salts influence pure water
What are two most abundant salts in the ocean?
Chloride and sodium.
What is meant by residence and mixing time?
Residence time: approx. time salts spend in the ocean.
Mixing time: amount of time to completely mix components in the ocean(1600 years)
Why does water dissolve salts and not oil?
Molecules of oil are non polar, no negative or positive charge.
What is an ion?
Atoms with a charge
What is a molecule?
Group of atoms held together by chemical bonds.
What kind of bond holds salts together?
Ionic bonds
How does oxygen and carbon dioxide change as you go deeper? Describe why this happens.
The oxygen concentration decreases below the sunlit layer because of the respiration of marine animals and bacteria and because of the oxygen consumed by the decay of tiny dead organisms slowly sinking through the area.
What are the sources and sinks for oxygen, carbon dioxide and nitrogen in our ocean?
Nitrogen comes from the atmosphere.
Oxygen comes from their atmosphere and photosynthesis.
CO2 comes from the atmosphere and respiration.
What is meant by solubility?
Ability to contain gas in solution
How does temperature and pressure affect the solubility of gas?
Lowering the temperature and increasing pressure increases solubility.
What happens to pH when excess CO2 enters the ocean?
Greater depth, higher CO2 concentrations lower pH.
