1. Properties of Water ETO

2. Properties of Water Polar Adhesion Cohesion Capillary Action
Surface Tension

3. Water molecules are held together by hydrogen bonds….
Water (H2O)
Polar Covalent- * Polarity + + _
Water molecules are held together by hydrogen bonds….

4. Universal Solvent- able to dissolve many substances because of its polarity.
Solvent-Liquid
Solute -Solid

5. Non- Polar doesn’t mix…
WAXY
Cuticle
Lipids are non-polar

6. Is waters reaction Polar or Non-Polar
Polar molecules will react will other polar molecules. (Ex- Paper and Water.)
* they will show an attraction.
Polar molecules will not react with non- polar molecules. (Ex: Oil and Water)
* they will not show an attraction.

7. Polar or Non-Polar

8. * It allows drops to form….
Cohesion- water sticking to water
Adhesion- water sticking to
something else.
* It allows drops to form….

9. ADHESION
COHESION

10. Surface Tension
Surface tension: Caused by the cohesion of water molecules. Since Individual molecules are more attracted to each other than to the surrounding air.

11. Surface tension- water forms a film on the surface.

12. Helps insects walk across water
Surface Tension
Surface Tension
Lighter than Hydrogen Bonds
Helps insects walk across water

13. Capillary action- pulling of water up….
Adhesion and Cohesion

14. Capillary Action in Carnations
Adhesion and Cohesion

15. As water freezes, its molecules spread apart making frozen water less dense than liquid water. * So it floats…….
LATTICE

16. Water is Less Dense as a Solid
Ice is less dense …. That’s why ice floatsas a solid than as a liquid (ice floats)
LATTICE 1

17. Forms a Insulating Barrier
Why is it important that ice float to life on the planet?
Forms a Insulating Barrier

18. High Specific Heat Capacity- ability to maintain a temperature.
* Water takes longer to heat up, and
losses the heat slower.
* Temperatures in deserts- Day- Hot Night-Cold
Why?

19. Heat Capacity (High)
Water changes temp very slowly because it can store heat.
This protects living organisms from the shock of abrupt temperature changes.
Helps control the world’s climate.

20. How polarity makes water behave strangely - Christina Kleinberg

21. 1. Water dissolves many substances. This occurs because water has-
A. surface tension
B. polarity
C. specific heat
D. cohesion

22. 2. When the cells of most organisms freeze, they burst.
A. Water is a universal solvent.
B. Water changes temperature rapidly.
C. Water is less dense as a solid than as a liquid.
D. Water is a nonpolar molecule.
Which property of water causes this to occur?

23. 3. Some adult insects are unable to swim but are able to walk on top of water. What
characteristic of water enables these insects to walk on top of water?
A. pH
B. surface tension
C. solvent properties
D. atomic bonds

24. 4. When water dissolves a substance, weak charges carried by water molecules attract the substance’s oppositely charged atoms and pull them away from their molecules. This is a function of which property of water? A. pH B. polarity C. cohesion D. surface tension

25. 5. Ice floats on a lake. This characteristic of water is responsible for —
A. suffocation of aquatic organisms
B. mixing a lake’s thermal layers
C. preventing a lake from freezing solid
D. altering migration patterns of fish

26. A. Water expands as it freezes. B. Water is an excellent solvent.
6. Water is essential for life. Its special properties make water the single most important molecule in plant life. Which of the following properties of water enables it to move from the roots to the leaves of plants?
A. Water expands as it freezes.
B. Water is an excellent solvent.
C. Water exhibits cohesive behavior.
D. Water is able to moderate temperatures.
Water Cycle
Important

27. 7. Large bodies of water, such as lakes and oceans, do not quickly fluctuate in temperature.
What is the reason for this phenomenon?
A. Water is an acid.
B. Water is a versatile solvent.
C. Water has a high heat capacity.
D. Water acts as a buffer.

28. Forms a Insulating Barrier
8. Why does ice stay at the top of oceans instead of sinking to the bottom?
A. Ice is colder than liquid water.
B. Ice is less dense than liquid water.
C. Ice is more dense than liquid water.
D. Ice is warmer than liquid water.
Forms a Insulating Barrier

29. 10. A scientist believes that a factory has been dumping acid into a local river.
To test this hypothesis, which property of water should the scientist monitor?
A. pH
B. density
C. polarity
D. temperature

30. Properties of Water Polar Adhesion Cohesion Capillary Action
Surface Tension

31. Definition of Property Relates to everyday life
Property of Water
Definition of Property
Relates to everyday life
Sketch
Polarity
Cohesion
Adhesion
Capillary Action
Surface Tension
Heat Capacity
Freezing anomoly
Have students brainstorm as a group from the following slides to fill in the chart.
Copy in notebook

32. Polarity Cohesion Adhesion Capillary Action Surface Tension
Property of Water
Definition of Property
Relates to everyday life
Pictures
Polarity
Having positive and negative charge.
Ability to dissolve substances
Student sketches may vary
Cohesion
Water sticks to itself
Form drops and surface tension
Adhesion
Water sticks to other objects
Allows for capillary action
Capillary Action
ability of a liquid to flow in narrow spaces
Transfers water from roots to leaves (transpiration)
Surface Tension
Forms a film on surface
Allows things (insects) to float on water.
High Heat Capacity
of heat required to change its temperature
Moderates temperature changes. Ex: Bodies of water.
Freezing anomaly
Expands as it freezes
May cause cells to rupture.
Prevents lake from freezing solid.