1. Water and Seawater

2. Can Polar oceans completely
freeze?
 No

3. What is the density of water?
 1 g/cm3

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

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

6. What do hydrogen bonds account
for?
 Acts as a solvent
 Has high surface tension
 High boiling point
 High heat capacity

7. Why can insects walk on water?
 Surface tension

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

9. How is the ocean layered?
 Density
 Temperature
 salinity

10. True or False?
 Increasing heat is
an object’s
response to an
increase in
temperature.
 False. This is
called “latent”
heat.

11. Which wavelengths of light can
penetrate the deepest into the
ocean?
 Green and blue.

12. What determines density of
seawater?
 Salinity and temperature

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

14. What is the percentage of
incoming sunlight absorbed by the
land and water?
 51%

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

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

17. What is the average salinity of
seawater?
 34 ppt.

18. What are the 2 most abundant
elements dissolved in seawater?
 Sodium
 Chloride

19. Acid – high or low value?
 Low

20. What is a solution made of?
 Ion
 atom

21. Water Cycle