Monthly Archives: April 2016

Physics 4-29-16 Applications of Lenses & Refraction

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PHYSICS: Today was the last of the applications of lenses and refraction. I love it when you get to see how physics crosses over into other disciplines of science – from physiology with myopia and hyperopia and how lenses can help, to how microscopes and telescopes work. And also ever important to know – why is sky blue, and why are sunrises and sunsets orange?!?

Speaking of lasts – the LAST chapter test is Tuesday!! What should you practice? Application of concepts, ray diagrams with mirrors and refraction through a transparent medium and lenses, and problems. Hey, here’s something to think about… can something really disappear into thin air? How??

Physics 4-29-16 Applications of Refraction from Tammy Skinner on Vimeo.

Image source pixabay.com CC0 Public Domain

Chemistry 4-29-16 Synthesis & Decomposition Reactions

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CHEMISTRY: Wow! So that’s where the pretty light comes from! Great job on synthesis and decomposition reactions. Now go forth and practice what you learned! (The balancing equations part, not the playing with magnesium part!)

Chemistry 4-29-16 Synthesis & Decomposition Reactions from Tammy Skinner on Vimeo.

Image source: Pixabay.com CC0 Public Domain

Hon Chemistry 4-29-16 Chapters 10a & 11 Test Overview & Help Session

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HON CHEMISTRY: God bless you as you prepare for the test on chapter 11 – and don’t forget the first part from chapter 10 on the Kinetic Molecular Theory! Here are both the help session from this morning and the test review from today’s class. The second one is the help session. CAUTION – There’s no audio on the help session for about the first 30 minutes, I forgot to turn on the mic!

Have you made your “stuff to know, stuff to know how to do, and stuff to know how to apply” list? Here are the laws and people I can think of, can you think of any more? Dalton’s law of partial pressure, Henry’s Law, Graham’s law of effusion, Boyle’s law, Charles law, Gay-Lussac’s law, combined gas law, Avogadro’s Law, and Gay-Lussac’s law of combining volumes. And don’t forget Torricelli and pressure. Whew!

Super important – working problems is great, but make sure you can apply the concepts! I’ll be praying for you, you can do it!!

Hon Chemistry 4-29-16 Chapters 10a & 11 Test Overview from Tammy Skinner on Vimeo.

Hon Chemistry 4-29-16 Gas Laws Help Session – NO AUDIO for first 20 minutes from Tammy Skinner on Vimeo.

Image sources: pixabay.com CCO Public Domain

Hon Chemistry 4-28-16 Ideal Gas Law

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HON CHEMISTRY: I meant to post this picture earlier! How much fun can you have with a Sprite can? Wow! Did you have a heart attack? More importantly were you able to tell me why it did what it did? Think about words like steam, condensation, atmospheric pressure.

How’d you like putting the gas laws together in the ideal gas law today? Pretty cool, huh?!? Don’t forget to memorize R!

HW Update: The answer to 49c is 1.06 atm

Need help? Help session Friday morning, 7:20ish A.M.

Hon Chemistry 4-28-16 Ideal Gas Law from Tammy Skinner on Vimeo.

Chemistry 4-28-16 Reversible Reactions & Balancing Equations

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CHEMISTRY: Happy Thursday! Okay, maybe balancing equations isn’t exactly like this, but…..

Here are the notes on reversible reactions, plus lots of practice from the balancing equations worksheets you’ve been working on. Let’s crank it up a notch tomorrow!!

Chemistry 4-28-16 Reversible Reactions & Balancing Equations from Tammy Skinner on Vimeo.

flickr photo by Pink Sherbet Photography

Hon Chemistry 4-27-16 Molar Volume of Gases & Gas Stoichiometry

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HON CHEMISTRY: Okay, for the record, water balloons do not obey Avogadro’s Law, but gas balloons do! Equal volume balloons contain the same number of molecules. And how about the Gay-Lussac’s Law of Combining Volumes? Yay, more great conversion factors!! How are you doing with blending the old and the new?

Hon Chemistry 4-27-16 Molar Volume of Gases & Gas Stoichiometry from Tammy Skinner on Vimeo.

flickr photo by dmdzine

Chemistry 4-26-16 Describing Chemical Reactions

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CHEMISTRY: So tell me again – how do you know if a chemical reaction has occurred? Here’s the lecture on the evidences of a chemical change and the intro to balancing chemical equations. Great to be back to chemistry!

I love what you did with the paper chromatography lab yesterday and today. Lab reports, including your pictures of your will be due Saturday midnight. Note the change – you won’t be drawing the results, instead you’ll take pictures of BOTH sets of chromatographs and BOTH sets of unknowns. Tomorrow, when you first get to class, take photos of your chromatographs with a ruler laying beside them so you can also your results at home for your observation. Be sure your initials are on everything!!

BTW – Here are links to the videos from today if you want to learn more!

Fluorine Reactions
Blue Flame Thrower – Diethylzinc

Chemistry 4-26-16 Describing Chemical Reactions from Tammy Skinner on Vimeo.

Image source: periodicvideos.com

Hon Chemistry 4-25-16 Gas Laws

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HON CHEMISTRY: Here’s our look at the gas laws today: Boyle’s law, Charles Law, Gay-Lussac’s law, and the combined gas law. Thank you, Millie, for being “guest writer” today! These gas law guys did great work – and you’ve got to love their hair!! Can you apply what they discovered in everyday situations?

Be sure you use Kelvin in the problems – not Celcius. And make double dog sure you use the formulas correctly! Rearrange that thing – no plug and play!! Here are answers from tonight’s homework:

20.) 121 K or -152°C
21.)142 mL
22.) 0.360 atm
23.) 3.41 L
24.) 127°C
25.) 38.8 kPa
32.) -43°C
33.) 9.98 m3/day
60.) 2.18 L

Hon Chemistry 4-25-16 Gas Laws from Tammy Skinner on Vimeo.

flickr photo by wine me up

Physics 4-19-16 Refraction, Pt. 2

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PHYSICS: Here’s the lecture from tuesday on refraction, critical angles and total internal reflection. So…..did you find it? What color is a polar bear?

Change in plans – we’re going to play a bit with refraction tomorrow. We’ll do thin lenses Monday when we get back from Six Flags!

Physics 4-19-16 Refraction, Pt. 2 from Tammy Skinner on Vimeo.