Water Chemistry Questions

1. Pressure is measured in atmospheres. About how many atmospheres of pressure would be exerted at 100m under the sea?

2. Pressure exerted by the ocean on an object is known as

3. In Florida, the density of the water off our coast would ____ as temperature decreases.

4. Maximum density of pure water occurs at..

5. Water can resist rapid temperature changes because of its

6. The most important physical factor limiting the distribution of ocean life is

7. The zone between the warm surface water and cool bottom water is the

8. Saturation level for gases in the sea (a) differs between different gases (b) is dependant on temperature (c) can change with turbulence (d) all of these (e) none of these

9. Most oxygen in the atmosphere comes from

10. What is the difference between anaerobic and aerobic?

11. Why does O2 level decline as the depth increases?

12. How much light gets absorbed within the 1st meter of the sea?

13. What do marine plants use sunlight for?

14. What is compensation depth?

15. What is the difference between stenohaline and euryhaline organisms?

16. What does salinity measure?

17. What are the sources of salts in the sea?

18. The zone where photosynthesis occurs in the sea is the......zone.

HW>1. Compare factors affecting concentration of dissolved soilds and gases in seawater.

2. How does hydrogen bonding increase waters ability to moderate ocean temperature?

3. Describe buffering reactions that control pH in sea water.

4. Why is nitrogen fixing important in the sea? (What is it?)

5. How are cold water organisms equipped to function most efficiently in cold water instead of warm?

6. How does Hydrogen bonding increase the boiling point of water? What would it be without H-bonds?

7. How does chlorinity relate to salinity?