Webquest For Water Chemistry
http://www.windows2universe.org/earth/Water/dissolved_salts.html
1. Define Salinity:
2. In what units do scientists report salinity? Give an example of what the unit
means.
3. What is the average salinity of the ocean?
4. What % of the ocean is salt?
5. List the 6 main dissolved salts in the ocean:
http://www.windows2universe.org/earth/Water/ocean_chemistry.html
6. What makes the ocean salty?
7. What greenhouse gas dissolves in ocean water?
http://www.windows2universe.org/earth/climate/ocean_acidification.html
8. What does CO2 become when too much of it dissolves in the ocean?
9. What do many marine creatures use to build their shells?
10. What does acid do to marine shells?
http://www.windows2universe.org/earth/Water/density.html
11. What is the average density of ocean water? Is it more or less dense than
fresh water?
12. What are the 2 main factors that affect the density of sea water?
13. What happens to the density of the ocean as you go to the bottom of the
ocean?
http://www.youtube.com/watch?v=TDEzBWjQpQI&feature=related
14. Why do you think this man is able to float so easily in the dead sea?
http://www.extremescience.com/dead-sea.htm
15. What percent of the dead sea is salt?
16. How much more salty than the ocean is the dead sea?
17. Why do you think only certain types of bacteria can survive in the dead sea?
Why do fish instantly die?
18. Why is the dead sea very dense?
19. What affect does this density have on people swimming in the dead sea?
http://globetrooper.com/notes/why-cant-we-drink-sea-salt-water/
20. Give 2 reasons why our bodies need water.
21. How do our bodies cool off if we are hot?
22. Under normal conditions, our bodies should be in an __________________
state, where the concentrations of water in our cells equals that of outside of
our cells.
23. If the salinity (amount of salt) outside of you cells is greater than the salinity
inside, what will happen?
24. Why do runners need to drink sports drinks that have sodium and
potassium?
25. What will happen to your cells to you if you drink salt water?
26. So if at the aquarium you get stuck on a tiny boat in the salt water tank and
get really thirsty, is it okay to take a quick drink of water to quench your thirst?
http://www.doctortee.com/dsu/tiftickjian/cse-img/cell-biol/membranes/osmosisanimal.jpg
27. Define isotonic:
28. Draw a cell in an isotonic solution (normal)
29. Define Hypotonic Solution:
30. Draw and describe what happens to a cell placed in a hypotonic solution.
31. Define Hypertonic Solution:
32. Draw and describe what happens to a cell placed in a hypertonic solution.
http://www.youtube.com/watch?v=IRQLRO3dIp8
33. What happens to the Red Blood Cells in this hypertonic solution?
http://www.youtube.com/watch?v=IRQLRO3dIp8
34. What happens to the Red Blood Cells in this hypotonic solution?
http://marinebio.org/oceans/ocean-chemistry.asp
Based on the diagram of a water molecule, what do you notice about the polarity
(charges) of the water molecule itself?
http://dl.clackamas.edu/ch105-05/definiti.htm
What determines the pH value of water? (What are we determining the
concentration of?)
http://www.youtube.com/watch?v=BXGF3XS-yAI
How hot is the water coming out of the vent?
What type of organism thrives in the vents?
http://www.marinebio.net/marinescience/04benthon/dsvents.htm
When did we discover deep sea hydrothermal vents?
Why is this date so surprising?
Through what process do the bacteria get their “cell food” or energy? How does it
work?
Why is this discovery so amazing?