LIVE INTERACTIVE LEARNING @ YOUR DESKTOP NSDL/NSTA Web Seminar: Chemistry Comes Alive! Thursday, March 8, 2007 6:30 p.m.
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LIVE INTERACTIVE LEARNING @ YOUR DESKTOP NSDL/NSTA Web Seminar: Chemistry Comes Alive! Thursday, March 8, 2007 6:30 p.m. to 8:00 p.m. Eastern time Agenda: 1. Introductions 2. Tech and help info 3. Web Seminar training 4. Presentation 5. Evaluation 6. Chat with the presenters http://nsdl.org How many web seminars have you attended? A. 1-3 B. 4-5 C. More than 5 D. This is my first web seminar. E. 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 http://nsdl.org Al Byers Assistant Exec. Director NSTA http://nsdl.org Flavio Mendez Program Manager NSTA Tech Assistance Jeff Layman Tech Support 703-312-9384 [email protected] NSTA Susan Hurstcalderone Science Teacher Volunteer Chat Moderator http://nsdl.org What grade level do you teach? (a) Elementary School, K-5. (b) Middle School, 6-8. (c) High School, 9-12. (d) I teach college students, 13-16. (e) I am an Informal Educator. http://nsdl.org Screenshot 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 Where are you now? http://nsdl.org LIVE INTERACTIVE LEARNING @ YOUR DESKTOP NSDL/NSTA Web Seminar: Chemistry Comes Alive! Thursday, March 8, 2007 7:00 p.m. to 8:00 p.m. Eastern time http://nsdl.org -NSDL Pathways for specific content -Newest Pathway: Chemistry -Rich variety of materials found in one place http://www.jce.divched.org/JCEDLib http://nsdl.org Our Presenters Dr. Lynn Diener Dr. John Moore Journal of Chemical Education (JCE) http://nsdl.org Today we will explore the chemistry of taste and odor using selected JCE resources • Classroom Activity • Featured Molecules • Video http://nsdl.org To taste, which is most important? A. B. C. D. http://nsdl.org Tongue Touch Sight Smell The nose can distinguish 10,000 different scents 1% of our genes code for smell http://nsdl.org 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 http://nsdl.org The mouth tastes only 5 things -Sweet -Salty -Sour -Bitter -Umami http://nsdl.org Example structures Sucrose (sweet) (S)-Glutamic Acid (umami) Ascorbic Acid (sour) Strychnine (bitter) Wouldn’t it be nice to see all sides of a molecule at once? Sodium Chloride (salty) http://www.chemeddl.org/Quinine.html http://nsdl.org Which is bitter? Caffeine http://nsdl.org Maltose 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 http://nsdl.org Maltose 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: http://www.vanderbilt.ed u/vicb/Articles/LensSum mer2005/WhereAreTheN ewDrugs.htm Work by Rod MacKinnon Taken from: http://www.nsls.bnl.gov/newsroom/science/2006/01MacKinnon.htm http://www.jce.divched.org/JCEDLib Fooling the tongue is easy… because there are only 5 tastes to mimic • Sweet • Sour • Bitter • Salty •Umami A JCE Classroom Activity shows how. http://nsdl.org Which is really applesauce? A http://nsdl.org B Activity: making mock applesauce Need: – Cup – Crackers – Water – Sugar – Cream of tartar (or lemon juice) http://nsdl.org Are you planning to do the activity along with us? A.Yes B.No C.Maybe http://nsdl.org 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 http://nsdl.org How do these ingredients simulate applesauce? • • • • http://nsdl.org Sweet (sugar) Sour (cream of tartar) Juicy (water) Texture (crackers) 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! http://nsdl.org 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 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! Which one (or two) do you think was made with real apples? 1 3 2 4 http://nsdl.org Mmm, tastes like cherry! Artificial flavoring is big business. http://nsdl.org 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 http://nsdl.org Which product uses artificial flavor? http://nsdl.org 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! 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. JCE QBank—Test Questions JCE WebWare 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: http://nsdl.org 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: http://expertvoices.nsdl.org http://nsdl.org http://nsdl.org http://www.jce.divched.org/JCEDLib Dr. John Moore [email protected] Dr. Lynn Diener [email protected] Dr. Jon Holmes [email protected] THANK YOU! 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 LEARNING @ YOUR DESKTOP • 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 NSTA SciGuides: Provide tools to quickly and easily locate targeted science content information and teaching resources from NSTA-reviewed science web sites. http://sciguides.nsta.org Web Seminar Evaluation http://institute.nsta.org/survey/nsdlsurvey8.asp