Chemistry 3-31-15 Molecular Geometry

CHEMISTRY: Hey guys, great job adding the last step to Lewis structures – molecular geometry! Who knew we’d be doing geometry in chemistry?!?

Advice for Lewis structures – don’t forget to count the electrons! And then double check the number of electrons. And when you think it’s right, count the electrons!! 🙂

Advice for molecular geometry? Make sure you know how to draw Lewis structures, then determine the type of ABE structure and you’ve got it. Easy-peazy!

BONUS: At the end of this vodcast, some questions and answers from 7th period about the project!

Chemistry 3-30-15 Molecular Geometry from Tammy Skinner on Vimeo.

Chemistry 3-27-15 Lewis Structure Practice

CHEMISTRY: Another fun day playing with dots! Great practice today – here’s some a look at some of the homework problems. One of the best things you can learn to do is find your own mistakes and figure out what to do to correct them!

If you didn’t in class, finish the worksheet for homework. And have a great weekend working on your project!!

Chemistry 3-27-15 Lewis Structure Practice from Tammy Skinner on Vimeo.

flickr Photo by SaltGeorge

Physics 3-27-15 Sound Intensity and Resonance

PHYSICS: Great applications of sound today – sound intensity and resonance!!

Lab tomorrow! Be sure and check the syllabus for the thLAB that you will do at home and the other one that you will actually do in class tomorrow.

Couple of items to apply for discussion – so how does the whole hearing thing work? I mean, I know the little bones in your ear move, but why? Is resonance involved? Great item for application/discussion. And here’s another – why would different violins produce different sounds? I mean, is a Stradavarius valued so highly just because of the name? Let’s talk more about that!

PHYSICS 3-31-14 Intensity & Resonance from Tammy Skinner on Vimeo.

flickr photo by Morning Guitar

Hon Chemistry 3-27-15 Balancing Chemical Equations Practice

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

Great practice today! Do you feel better about balancing equations? Let’s see if you can come up with some products for yourself on Monday!

Hon Chemistry 3-27-15 Balancing Chemical Equations Practice from Tammy Skinner on Vimeo.

flickr photo by D. Sharon Pruitt, Pink Sherbet Photography

Chemistry 3-26-15 Resonance & Polyatomic Ions

CHEMISTRY: Wow! Lewis structures, multiple bonds, and now resonance, and now polyatomic ions! That’s a lot you’ve conquered in the last couple of days!

Here’s some good advice – don’t take shortcuts. Learn the proper steps on the easier molecules, and you’ll be able to do the hard ones. And if it’s still all Greek to you, don’t worry! Keep practicing and you’ll get it, I promise!! Don’t forget to count electrons and don’t forget CONS!

Chemistry 3-26-15 Resonance & Polyatomic Ions from Tammy Skinner on Vimeo.

Hon Chemistry 3-26-15 Describing Chemical Reactions

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

Hon Chemistry 3-26-15 Describing Chemical Reactions from Tammy Skinner on Vimeo.

flickr photo by vmaddalena

Chemistry 3-25-15 Multiple Covalent Bonds

CHEMISTRY: Great job practicing multiple bonds with Lewis structures today! Here’s the lecture from yesterday on double and triple covalent bonds, with resonance at the end.

CHANGE: As I told you in class, I’ve made a change to the syllabus – switched Thursday and Friday, so you can have the whole weekend to work on your project. Make sure you get a new copy of the syllabus. It will say “Revised.”

Be careful about getting too happy with double bonding – count electrons and don’t forget CONS. And what else? Oh yes, PRACTICE, PRACTICE, PRACTICE! We’ll put one more twist on Lewis structures tomorrow!

Chemistry 3-25-15 Multiple Covalent Bonds from Tammy Skinner on Vimeo.