1. 2/23/12 A/B Day
LEQ: How does the polarity of water
influence its physical properties?
1. What is buoyancy?
2. What is surface tension?
3. What is more dense—warm water or cold
water?
4. Why do we call water the universal solvent?
5. Copy and complete: Water’s [high/low]
specific heat means that it requires a [high/low]
amount of heat for water to get hot!

2. Track your progress: Unit 2 Quiz D
-1 = 96 -9 = 64 -17 = 32
-2 = 92 -10 = 60 -18 = 28
-3 = 88 -11 = 56 -19 = 24
-4 = 84 -12 = 52 -20 = 20
-5 = 80 -13 = 48 -21 = 16
-6 = 76 -14 = 44 -22 = 12
-7 = 72 -15 = 40 -23 = 8
-8 = 68 -16 = 36 -24 = 4

3. Today’s LEQ: How does the polarity of
water influence its physical properties?
By the end of today, you should be able
to…
1. Describe the polarity of water.
2. Explain why polarity creates cohesion
and adhesion of water

4. Focus Vocabulary
109. Polarity
110. Cohesion
111. Adhesion

5. CONTEXT CLUES:
“Those two twins are polar opposites. They are
nothing alike.”
“The cowboys are such a cohesive team. They
practice together, play together, and even eat all of
their meals together!”
“The stickers that you put on your car have two
sides—one side has a design on it and the other
side is the adhesive side.”
Stop and Jot: Write your own definition of

6. Polar/Polarity

7. Cohesive/Cohesion

8. Adhesive/Adhesion

9. Draw this in your notes:
Polarity:
Cohesion: Adhesion:

10. Draw this in your notes:
Polarity: uneven charges in a water
molecule; causes water to be sticky!
Cohesion: Adhesion:

11. Draw this in your notes:

12. Discovery Education Video:
Water’s molecular structure (How Stuff Works)

13. Water sticks to
itself.
Water sticks to
other stuff.

14. Draw this in your notes:
Polarity: uneven charges in a water
molecule; causes water to form bonds!
Cohesion: the Adhesion:
tendency for water
molecules to stick to
other water molecules
Ex. Water drops stick
together

15. Cohesion Demo:
Can you get water to stick to itself?
Make a C with your fingers

16. Surface Tension—
this happens because of COHESION!

17. Draw this in your notes:
Polarity: uneven charges in a water
molecule; causes water to form bonds!
Cohesion: the Adhesion: the
tendency for water tendency of water to
molecules to stick to stick to other
other water molecules substances
Ex. Water drops stick Ex. Water sticks to
together other things

18. Adhesion Demo:
Can you get water to stick to
other stuff?
Make a C with your fingers

19. Adhesion—water sticks to the side of
a straw
Adhesion

20. Water
Other stuff!
Water Water

21. Cohesion,
Adhesion,
or
Polarity?

22. Water sticks to a spider web

23. Water sticks together over the edge of
a glass

24. Water has uneven charges

25. Water stays together on saran wrap

26. Water sticks together in drops

27. Water sticks to blood cells

28. Water creates bonds

29. Water sticks to a windshield

30. Water sticks to a leaf

31. Water has a positive and negative end!

32. Water ripples do not break the surface

33. Quiz-Quiz-Trade

34. Use your notes and your new knowledge
to add on to your water bubble map!
Physical
Properties
WATER
Polarity

35. Summarizer:
1. What is polarity?
2. What is the difference between
cohesion and adhesion?
3. Water sticking to the side of a glass—is
this an example of cohesion or
adhesion?
4. Water sticking to another drop of
water—is this an example of cohesion or
adhesion?