1. Keep Your Head Above Water with Magnetic Water Molecule Models

2. Workshop Learning Objectives
Educators attending this workshop will:
Utilize tools that can support the NGSS student learning outcomes of three dimensional lesson design including the –
Water Kit© to model the polar nature of water, phases, solubility, density, and the water cycle!
Learn something new and interesting that is for your own professional development.
HAVE FUN!

3. Workshop Learning Objectives
What NGSS dimensions will be targeted?
SEPs
CCCs
DCIs
Asking questions and defining problems
Patterns
PS1.A: Structure and properties of matter
Developing and using models
Cause and effect
LS1.A: Structure and function
Constructing explanations and designing solutions
Systems and system models
LS1.C: Organization for matter and energy flow in organisms
 Analyzing and interpreting data
Structure and function
ESS2.C: The roles of water in earth’s surface processes

4. Engage with the Water Cup
Spill your water cup!

5. Explore the Water Cup 1. Show me a physical representation of water.
How do you know which model represents a water molecule?
What color represents the oxygen?
Which atoms stick to each other?
Why do water molecules stick to each other?

6. Explain the Water Cup
Water is POLAR!
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7. Explain water Properties
Results in hydrogen bonding between water molecules!
2014 Pearson Education, Inc.

8. explain: The phases of water!
LIQUID

9. explain: The phases of water!
GAS

10. explain: The phases of water!
SOLID
BUT . . .

11. SOLID WATER IS PECULIAR!
A discrepant event! Why does solid water float in liquid water?
scienceabc.com

12. SOLID WATER IS PECULIAR!
Approximately18 different forms of ice have been identified!

13. Remember that Hydrogen Bonding?
Hydrogen bonding has implications for the formation of different ice crystal structures.
2014 Pearson Education, Inc.

14. Ice ice baby!
Building cubic Ice
Step 1
Step 2

15. Ice ice baby!
Building cubic Ice
Step 3
Step 4

16. Ice ice baby!
Completed cubic ice model

17. Ice ice baby!
Flip the cubic ice model

18. More Ice ice baby!
Transition from cubic ice to hexagonal ice

19. More Ice ice baby!
for Hexagonal Ice
Build two rings,
turn 180o

20. More Ice ice baby!
And stack!

21. BUILD A SNOWFLAKE!

22. So What, ice floats on liquid water. . .
Why does it matter?
What would happen to a lake’s ecosystem if ice sank and the lake froze from the bottom up?

23. What impact does declining amounts of sea ice have?

24. WOW! There’s A Lot of Space in there!

25. Elaborate: volume Further APPLICATIONs

26. WHY? Evaluate: volume Deep Freeze!

27. explain: Density

28. Demonstrate density differences
explain: density
Demonstrate density differences

29. Evaluate: Why Does Ice float?
scienceabc.com

30. engage: solubility What happens when salt dissolves in water?

31. Using Models to Explore the Phenomenon
explore: solubility
Using Models to Explore the Phenomenon

32. Using Models to Explain the Phenomenon
explain: solubility
Using Models to Explain the Phenomenon

33. elaborate: solubility All models are wrong – some models are useful!
Salt is not a molecule but rather an ionic compound.

34. explain: solubility
Does this molecule interact with the water molecules?
ETHANE
HYDROPHOBIC

35. MOLECULAR MANIPULATION
explain: solubility
MOLECULAR MANIPULATION

36. explain: solubility ETHANOL!
Does this molecule interact with water molecules?
HYDROPHILIC

37. explain: solubility
The hydrogen atom in the alcohol group of ethanol will form a hydrogen bond with the oxygen in a water molecule.
The hydrogen atom of one alcohol group will also form hydrogen bonds with the oxygen of other ethanol molecules.

38. elaborate: solubility
Question:
How long does the hydrophobic tail have to be before it overwhelms water’s interaction with the alcohol group?
How would your students design a lab to find out?

39. ElaboratE: the WATER cycle

40. Water Runoff, pollution, and Erosion
Water is a major agent in changing the Earth’s landscape.
Runoff can contribute to water contamination from sources such as road salt, fertilizers, or pesticides.

41. Evaluate: Water Runoff, pollution, and Erosion
Create a model of the system of water runoff and erosion.
Key:
Notebook = Ground
Paperclips = Soil
Magnetic Water = Rain
Construction Paper = Ground Cover
NGSS Execution:
Give the students the items and let them come up with their own model.

42. Water Runoff, pollution, and Erosion
Ground cover and other buffers help to prevent erosion and filter excess nutrients before reaching rivers and lakes.

43. Evaluate: Water Runoff, pollution, and Erosion
Students may incorporate ground covers and buffers to investigate the effect on erosion and water runoff.

44. THANK YOU!
For more molecular stories. . . Come visit us at booths 419 and 421! We hope to see you soon!