1. Properties
of Water
Honors Science

2. What is the formula for water?
What are some properties that make water unique?

3. Simply Science: Water's Physical Properties. United Learning. 1998
Simply Science: Water's Physical Properties. United Learning unitedstreaming. 2 March 2006 <

5. Complete your “Water Notes” using:
PowerPoint Notes
USGS Web Link
There will be “Quick Check” on this review content

6. What is WATER?
Only substance that naturally occurs on Earth in all 3 states
-Solid-Ice
-Liquid-Water
-Gas-Steam or Vapor
1 Oxygen and 2 Hydrogen atoms
Partial Polar COVALENT bond

7. H H O
Water is
POLAR!
Photo courtesy of:

8. Why does water form droplets?
Photo courtesy of:

9. What does it look like just before the water spills off the penny?
Use the medicine dropper to put as many drops of water as you can on the surface of your penny.
How many drops fit?
What does it look like just before the water spills off the penny?
Why can the penny hold so many drops of water?

10. Surface Tension HYDROGEN bonds attract water molecules to each other
They “stick” together
This causes them to pile up on each other
Photo courtesy of:

11. Photo courtesy of: http://www.shorstmeyer.com/wxfaqs/float/watermolec.html

12. Surface Tension Float a paperclip on top of a beaker of water
Add a drop of soap and see what happens.
What does the soap do to the water? Why?
Photo courtesy of:

13. Capillary Action Dip the paper towel into the beaker of water.
What happens to the water and the towel?
Look at the graduated cylinder.
What do you notice about the level of water next to the glass vs. the level of the water in the middle?
Explain why.

14. Capillary Action Water molecules “stick” together.
So…water molecules will “stick” together and can “climb” or travel through different substances.

15. Put the ice in the beaker of water. What happens to the ice?
Density
Put the ice in the beaker of water. What happens to the ice?
Why?
Observe the pot of boiling water? What is in the “smoke”? Why does it rise?

16. Density
Describe the arrangement of the molecules of H2O in each of the three states of matter.
What is the relative density of water in each of the three states of matter?

17. Solid Water...
Photo courtesy of:

18. Liquid Water...
Photo courtesy of:

19. Gaseous Water...
Photo courtesy of:

20. Why do bodies of water generally freeze only on the top?

21. Density Solid: particles are close together
Liquid: particles are near each other
Gas: particles are very spread apart
Water is unique:
Solid water is LESS dense than liquid water!!!
The density of water reaches a max at 4oC and then begins to decrease as water gets colder!!!

22. Solubility Ability of a substance to dissolve in a liquid
Water is polar; it can hold molecules in solution
“Salts” readily dissolve in water because they have +/- charges
Water is the UNIVERSAL SOLVENT
Solubility can sometimes be changed with temperature

23. Specific Heat
Why is the temperature of water often different from the temperature of nearby land?

24. Specific Heat
Specific heat- amount of heat required to raise the temperature of 1 gram of a substance by 1oC
Water can store an enormous amount of energy
Water has a very high specific heat
It must absorb much energy to increase in temp
It must lose much energy to decrease in temp

25. change temperature gradually?
Why do lakes and oceans
change temperature gradually?