1. NSDL/NSTA Web Seminar:
LIVE INTERACTIVE YOUR DESKTOP
NSDL/NSTA Web Seminar:
Chemistry Comes Alive!
Thursday, March 8, 2007
6:30 p.m. to 8:00 p.m. Eastern time

2. Agenda: Introductions Tech and help info Web Seminar training
Presentation
Evaluation
Chat with the presenters

3. How many web seminars have you attended?
1-3
4-5
More than 5
This is my first web seminar.
I don’t know what is a web seminar.
Use the letters A-E located at the top left of your actual screen to answer the poll

4. Al Byers Assistant Exec. Director NSTA
Flavio Mendez Program Manager NSTA

5. Jeff Layman Tech Support 703-312-9384 jlayman@nsta.org NSTA
Tech Assistance
Jeff Layman Tech Support NSTA
Susan Hurstcalderone Science Teacher
Volunteer Chat Moderator

6. What grade level do you teach?
Elementary School, K-5.
Middle School, 6-8.
High School, 9-12.
I teach college students,
I am an Informal Educator.

7. Screenshot

8. Pull down menus:
View: Window Layouts, Lock Windows
Tools: Audio, Edit Profile
Top buttons:
Your current layout, Polling tools
Participants’ window:
Names of participants, Tools’ icons, Raise hands, Emoticons, Step away door
Direct Messaging window:
Show, Send
Audio window:
Talk button, microphone and speaker volume level

10. Where are you now?

11. NSDL/NSTA Web Seminar:
LIVE INTERACTIVE YOUR DESKTOP
NSDL/NSTA Web Seminar:
Chemistry Comes Alive!
Thursday, March 8, 2007
7:00 p.m. to 8:00 p.m. Eastern time

12. http://nsdl.org -NSDL Pathways for specific content
-Newest Pathway: Chemistry
-Rich variety of materials found in one place

14. Our Presenters Dr. Lynn Diener Dr. John Moore
Journal of Chemical Education (JCE)

15. Today we will explore the chemistry of taste and odor using selected JCE resources
Classroom Activity
Featured Molecules
Video

16. To taste, which is most important?
Tongue
Touch
Sight
Smell

17. The nose can distinguish 10,000 different scents
1% of our genes code for smell

18. What is this chemical called?
Many chemicals we smell when we eat or sniff a flower are like this one:
What is this chemical called?
A. Ketone D. Ether
B. Ester E. Alkene
C. Carboxylic acid

19. The mouth tastes only 5 things
-Sweet
-Salty
-Sour
-Bitter
-Umami

20. Wouldn’t it be nice to see all sides of a molecule at once?
Example structures
(S)-Glutamic Acid
(umami)
Sucrose
(sweet)
Ascorbic Acid
(sour)
Wouldn’t it be nice to see all sides of a molecule at once?
Strychnine
(bitter)
Sodium Chloride
(salty)

22. Which is bitter?
Caffeine
Maltose

23. You can do this in your classroom
Using JCE DLib you can find two different molecules and ask students to point out similarities, or differences. Molecules can be rotated to show similar views of each. Space filling or ball-and-stick can be shown.
Sucrose
Maltose

24. Cells in the mouth have different taste receptors
G-protein-coupled
receptors
Sweet
Bitter
Umami
Ion channels
Salty
Sour
lllustration by William Oldham
Taken from:
Work by Rod MacKinnon
Taken from:

26. Fooling the tongue is easy…
because there are only 5 tastes to mimic
Sweet
Sour
Bitter
Salty
Umami
A JCE Classroom Activity shows how.

27. Which is really applesauce?B
A is really applesauce, B is made out of crackers, sugar and cream of tartar.

28. Activity: making mock applesauce
Need:
Cup
Crackers
Water
Sugar
Cream of tartar (or lemon juice)

29. Are you planning to do the activity along with us?
Yes No
Maybe

30. Try this Crumble 1 or 2 crackers into a dish Add 2 tsp water
Add 1 tsp sugar
Add 1/8 tsp cream of tartar (or lemon juice)
Stir and taste

31. How do these ingredients simulate applesauce?
Sweet (sugar)
Sour (cream of tartar)
Juicy (water)
Texture (crackers)

32. Safety Matters
All JCE classroom activities include safety considerations.
For this activity make sure not to use lab equipment or perform the activity in a lab!

33. Variations Lemon juice or citric acid instead of cream of tartar
Try adding cinnamon or nutmeg
Use different crackers, saltine vs butter crackers
Add vanilla flavoring

34. Extension: Bake a mock apple pie and a real apple pie
Use the best filling recipe from the students
Have a taste test, see who can tell the difference.
Frozen pie crust works great!

35. Which one (or two) do you think was made with real apples?1 3 2 4
apple pie filling

36. Mmm, tastes like cherry! Artificial flavoring is big business.

37. Artificial flavoring Cheaper Purer and safer Often tastes just as good
Active flavor is often chemically identical to the natural flavor
Vanillin: artificial vanilla flavoring, taken from JCE DLib

38. Which product uses artificial flavor?
Dannon light ‘n fit blackberry

39. Another activity to try in class
Have your students make cola using these ingredients:
-sugar
-vanilla extract
-cinnamon
-lime juice
-club soda
If you search for taste on the JCE index you will find more classroom activities and useful articles!

40. Chemical Education Digital Library (ChemEd DL)…
is starting with resources from the JCE DLib, building on resources from the ACS Education Division and ChemCollective project, and will grow from there.

41. JCE QBank—Test Questions

42. JCE WebWare

43. JCE DLib Everything we used today can be found on the JCE DLib
Please come and visit (after filling out the survey)
Here is what to look for:

45. Go to http://nsdl.org and click on the K-12 audience page
Download this seminar’s companion guide with resources from the seminar and more!
Expert Voices blog with our presenters:
Robert concludes

46. THANK YOU! http://nsdl.org http://www.jce.divched.org/JCEDLib
Dr. John Moore
THANK YOU!
Dr. Lynn Diener
Dr. Jon Holmes

47. National Science Teachers Association
Gerry Wheeler, Executive Director
Frank Owens, Associate Executive Director Conferences and Programs
Al Byers, Assistant Executive Director e-Learning
NSTA Web Seminars
Flavio Mendez, Program Manager
Jeff Layman, Technical Coordinator
Susan Hurstcalderone, Volunteer Chat Moderator
LIVE INTERACTIVE YOUR DESKTOP

48. JPL/NSTA: Using Earth to Explore Mars
March 14, 2007
NSTA: Absolute Zero: The Cold Hard Facts About the Coolest Stuff in Physics
March 22, 2007
6:30 PM Eastern Time

49. NSTA SciGuides: http://sciguides.nsta.org
Provide tools to quickly and easily locate targeted science content information and teaching resources from NSTA-reviewed science web sites.

50. Web Seminar Evaluation