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Welcome!

Welcome!. Contemplating the nuts & bolts of Life “ It ’ s atoms all the way down ”. About me. This is my section. You are my people. Do not expect things to be identical between this section and others in this course. What Lab is. Thinking, Understanding, Investigating, Evaluating

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Welcome!

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  1. Welcome! • Contemplating the nuts & bolts of Life • “It’s atoms all the way down”

  2. About me... • This is my section. You are my people. • Do not expect things to be identical between this section and others in this course

  3. What Lab is • Thinking, Understanding, Investigating, Evaluating • Not arrive, assembly line, leave • Manual pp. ix & xi should help • Not sync’ed with most lecture sections, but internally coherent & mutually reinforcing

  4. Expectations • Read the lab manual BEFORE lab • Be ON TIME to class • PARTICIPATE • Complete the assignments (online, etc) • Participate

  5. Control Center • You will use this to access ALL the information for the course including the schedule, your homework and grades • You will NOT use D2L for much in this course other than submitting written work • If you don’t download, install and this program successfully and as soon as possible, it negatively impacts your chances of doing well in the course

  6. Control Center Accounts • These are your homework accounts. It is where all the answers that you generate for your computer homework is stored. • Go to the Control Center Icon on the desk top • Be absolutely certain that you are selecting the correct one. You are in 181, so pick that one. If you pick the one for 184 (a different course) you will be creating an account in the wrong place. • The background for 181 Control Center is GREEN

  7. Control Center Account Con’t • Once you have opened Control Center, select ‘create student account’ at the bottom left of the page

  8. Control Center Account Con’t • That will bring you to the UA WebAuth page. Log in with your NetID and password

  9. Control Center Account Con’t • That will bring you to the UA WebAuth page. Log in with your NetID and password

  10. Control Center Account Con’t • This will bring you to this page • Enter your name and pick your section • Enter a password (NOT your UA Web Auth. Password. I have access to this data base and you don’t want me knowing your email password) • Click ‘Join Lab Section’ then hit LOG OUT of Web Auth and let the next person go

  11. Click for more info Calendar operation

  12. How? Why? the Tao of Molecules • The feel of molecules • The world they live in

  13. Primary goals • Create understanding by observation, reasoning • Chemical foundations for the course: • Water & its properties • non-watery things • Know molecules as real & tangible things

  14. When a journalist asked the great physicist Richard Feynman what single sentence would best encapsulate all science so far if it were to be the sole surviving scrap of all we knew, he replied,“The world is made of atoms.” From The Secret of Scent, Luca Turin p.28

  15. Atoms: They’re how life works • DNA, RNA: C, H, N, O, P, [Mg++] • Carbs: C, H, O • Protein: C, H, N, O, (S), (P) What cannot be done with assemblages of these atoms cannot be doneby living organisms, nor their cells, nor their spit, etc.

  16. Outer shell Who am I? • At birth, # protons = # electrons • Atoms seek completion, which means outermost electron set = 8 (hydrogen, helium it’s just 2) Freeman Fig. 2.1a

  17. Symbolizing • Atoms & Molecules

  18. Coloring your world

  19. + O H H + - Views of Water (There will be a test) H2O See lab manual, p. 0-3

  20. Interacting with H2O To your StructViewers! (Software tab of Control Center)

  21. Doing it • Computers, stations • Write your group name down; otherwise you can’t retrieve your work!

  22. How to draw molecules Carbon HydrogenOxygenNitrogen Figure is from Lab Manual p. 0-5

  23. Let the exercise commence!

  24. Some words on Jargon • DON’T use it! • "If you can't explain it simply, you don't understand it well enough."– Albert Einstein • If you really understand something you should be able to explain it using simple, everyday language> That is what you will be required to do in this lab and for all the written work you will complete today and for homework • If you must use a ‘big, fancy word’, fine, but you must DEFINE it in simple language in order to use it

  25. Let’s make sense together • The pepper: what was relevant about the balloon analogy? • Remember, the pepper is an indicator (way to visualize). What’s the water doing? • Mix and match: If the detergent really has broken the surface tension of water… what? • Can you PREDICT the result of a staple-floating attempt? • The drops. Does ‘like attract like’? Just what does oil like?

  26. TA-lead discussion • OPTIONAL; Note that there are 20’ of assignment explanation & cleanup relevant • If it’s after ##:15 o’clock, you don’t have time for this

  27. Evaporation • First things first--what is it? What’s going on in terms of molecules • Experiment: Ethanol and water on your arm: which is cooler & why? • Prediction: based on molecular weight, which should evaporate more quickly--H2O (2 x 1 + 1 x 16) or CH3CH2OH (5 x 1; 2 x 12; 1 x 16) • If not, why not? • Salt--ever tasted your sweat? Or anybody else’s for that matter? • What benefit might there be to adding NaCl to water that you are intending to evaporate?

  28. Clean up! • Oil waste in the hood • anything too messy wadded up and discarded

  29. Getting Control Center • Go to the homepage: http://blc.arizona.edu/courses/mcb184/switcher.html • Select MCB181L .

  30. Getting Control Center • This will take you to the 181L homepage • Select Control Center .

  31. Getting Control Center • That will take you to this page. Select Mac or Win for 181L • The information above provides detailed information for trouble shooting if you run into problems installing Control Center • Please read those carefully before frantically emailing me .

  32. Control Center • Download and make sure you can use Control Center today as soon after you leave lab as possible. • If you cannot get this to work on your computer, you can go to the Science or Main Library and install it there • If you wait to email me until a few hours before your homework is due I will not help you with installing Control Center. I do not answer student email about homework after 5pm on the day homework is due

  33. What’s an Assessor?

  34. What’s vocabulary homework? • EITHER both versions of the crossword exercise (Xwords) • ORVocabuWary (very strongly preferred/suggested) with a better than threshold score - For “Atoms & Molecules”, that’s 60,000 - Errors count off. Slowness counts off. • You find these in Control Center under ‘Non-Assessor software’

  35. Some advice http://www.damnlol.com/please-do-me-right-now-224.html

  36. SyllabusStuff

  37. Policies & Grading • Syllabus (Linked via Control Center) • Honor code & Plagiarism (Manual, p. xiii) • Assignments

  38. 80% of success is just showing up* • Absences must be excused by Tina Gingras in BSE109 prior to making up. Contact her as soon as possible. Really. • An unexcused absence means that you receive a zero for in-lab activities AND all associated homework including any big projects that are assigned during that lab • Late is absent. Leaving early is absent. • Labs cannot be offered week after they are delivered; Avoid missing a lab • Missing 2 labs => you’ll be dropped from the course--excused or otherwise (b/c you’ll have little shot at learning what you need) *--Woody Allen

  39. Quiz next week Next week’s quiz will include ***Concepts from today ***Atom colors ***Deducing partial charges (from tutorial) ***Manual Ch. 2 ***Plagiarism contract (turned in today or start of class next week)

  40. Homework – See the CONTROL CENTER

  41. Follow-up, extras, etc. (you can ignore) • A buffet of the MolTao

  42. Great experiments Molecules: two dimensions or three? For 3D: ‘Duo_Comparator’ in Lab01_Tao folder Compare tetrahedron_1 and _2

  43. 43 Thinking about big pictures

  44. Macro molecules • magnetic waters--magnets with poles lined up appropriately for H, O • inert ping pong balls • Mix...

  45. Non-newtonian fluids for fun • Running on water • Cornstarch on a subwoofer • Longer, better running + subwoofer + bowling ball

  46. Water and ice http://biomodel.uah.es/en/water/index.htm

  47. Why does Chemistry matter? Because... “Any organism in equilibrium with its environment is dead.” --Bruce Averill and Patricia Eldredge, Chemistry 2005

  48. Atoms: mainly empty http://www.phrenopolis.com/perspective/atom/ Also available under ‘Further Explorations’ for this week, titled ‘where’s an electron’

  49. Some perspective • Electromagnetism: force between 2 charged particles; inverse distance • 1% excess of (+) charge force on one person & 1% (-) on person nearby => collision w/ enough force to knock earth out of orbit around sun • strong nuclear force (always attractive; holds nucleus together; executed by gluons) overcomes charge repulsion • electron location is POTENTIAL energy until movement (between orbitals) is allowed All derived from the Teaching Company’s “The Physics of History” lectures delivered by David Helfand, Ph.D.

  50. We also now appreciate that molecular biology is not a trivial aspect of biological systems. It is at the heart of the matter. Almost all aspects of life are engineered at the molecular level, and without understanding molecules we can only have a very sketchy understanding of life itself. --F. H. C. Crick, What Mad Pursuit, p. 61

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