3. NES Educator: Brenda Van Dyke
Let’s Get Started!
NES Educator: Brenda Van Dyke

4. It’s been a great week!

5. Goals of Web Seminar: Snowflake taxonomy & classification
Introduction
Goals of Web Seminar: Snowflake taxonomy & classification
Meet the scientists for The History of Winter:
Dr. Peter Wasilewski
Eric Erbe
Scientist do some outrageous stuff!

6. Dr. Peter Wasilewski

7. Dr. Peter Wasilewski in Antarctica

8. Eric Erbe and his Scanning Electron Microscope

9. The Secret of Snow: Discover-February 2004

10. Low Temperature Scanning Electron Microscope

11. Solar System Ice
NES Educators:
Tim Hart
Joe Cote

12. Winter on other planets Ice Formation on Earth and Mars
Solar System Ice
Winter on other planets
Ice Formation on Earth and Mars
Ice Formation Demonstration

13. Solar System Ice
Question 1: Do you think you can have winter with ice on the lakes and snowflakes in the sky on all the other planets?
Yes No

14. Question 2: How do you think winter will vary on Mars versus Earth?
Solar System Ice
Question 2: How do you think winter will vary on Mars versus Earth?
Ice will be colder on Mars
Ice will vary in color on planets
Ice will vary in size on planets
Ice will vary in shape on planets
Ice will be made from different stuff

15. Solar System Ice

16. Solar System Ice Question 3: What is different about these images?
Use your chat window to respond to us!

17. Solar System Ice
Question 4: Which do you think would simulate Martian frost? A or B? A B

18. Solar System Ice
Ice Formation
Live Demonstration

19. Solar System Ice

20. Solar System Ice

21. Solar System Ice
Looking through Dry Ice tank and seeing water ice in the background

22. Solar System Ice

23. Solar System Ice

24. Solar System Ice

25. Solar System Ice

26. Local Snowflake Classification
NES Educators:
Kyan Thornton
Tammy Brown
Todd Hanson
Frannie Becquer

27. Local Snowflake Classification
Question 5: Were you able to collect and observe your local snowflakes?
Yes No
Use Yes/No button on the right of screen

28. Local Snowflake Classification
Question 6: Which of these do you think are snowflakes?
Use the drawing tools to mark your image. Don’t hit the erase button! A B C D E F G H

29. Local Snowflake Classification
Hexagonal Plates
Stellar Plates
Hexagonal Columns
Needles

30. Local Snowflake Classification
Spacial Dendrites
Capped Columns
Irregular Crystals
Graupel

31. Question 7: What type of snowflake is this?
Local Snowflake Classification
Question 7: What type of snowflake is this?

32. Local Snowflake Classification
Question 7: What type of snowflake is this? A. Hexagonal Plates B. Stellar Plates C. Capped Columns D. Needles

33. Question 8: What type of snowflake is this?
Local Snowflake Classification
Question 8: What type of snowflake is this?

34. Local Snowflake Classification
Question 8: What type of snowflake is this? A. Hexagonal Plates B. Stellar Plates C. Capped Columns D. Needles

35. Question 9: What type of snowflake is this?
Local Snowflake Classification
Question 9: What type of snowflake is this?

36. Local Snowflake Classification
Question 9: What type of snowflake is this? A. Hexagonal Plates B. Stellar Plates C. Capped Columns D. Needles

37. What affects snowflake formation?
NES Educators:
Myra Bauer
Mary Tran
Mary Lara

38. What affects snowflake formation?
Question 10: Why do you think there are different types of snowflakes produced?
Use your chat window to talk back to us!

39. What affects snowflake formation?
Question 11: What might be some of the things that affect how a snowflake forms?
Use your chat window to talk back to us!

40. What affects snowflake formation?
Use the drawing tools that appear in the next slide to place an “X” for your state. Don’t hit the erase button, you’ll erase everyone’s marks!

41. What affects snowflake formation?

42. What affects snowflake formation?
Question 12: Thinking back to the map of the US, what is different about each school location and how might this affect snowflake formation?

43. Graph analysis: Snowflake Formation
NES Educators:
Sue Whiteside
Lisa Stoner

44. Graph analysis: Snowflake Formation
Question 13: Which factors might have the biggest impact on snowflake formation? A. Wind Speed B. Temperature C. Daytime/Nighttime D. Amount of water in air (humidity)

45. Graph analysis

46. Today In Review
Ice and winter exist on other planets in the solar system
Ice on other planets may be very different then water ice of Earth
There are different types of snowflakes on Earth that may be classified by a known taxonomy
Two main factors affect snowflake formation:
Water content in air affects snowflake size
Temperature of air determines snowflake type

47. Thank You
Sincere thanks to those that helped in creating and delivering today’s NES program:
- Dr. Peter Wasilewski - Dr. Tony Gow - Eric Erbe - NASA Glen Research Center - Baker Communications - The NSTA Institute - NASA Explorer School Educators!

48. Join Tomorrow’s Videoconference and Webcast
Sharing HOW data with students Friday, Feb. 20 1:00 PM –2:30 PM EST