Chemistry 11-18-14 Percent Composition

Posted on November 18, 2014 by Ms. Skinner

CHEMISTRY: Great job today… although, it was kind of weird watching you chew gum in class!

Lab reports are due Friday midnight – submitted as PDF 2X. Double check your calculations, sig figs, etc. Remember you are finding the percent of SUGAR in gum, so that means the mass of what goes on top? Show all your data in a data table – everything you measured and everything you calculated, and be sure to include formulas and calculations. And don’t forget the pictures and the conclusion!

BTW – I think you’ll find that percent composition problems are really easy to catch on to. Make sure, though, you can write chemical formulas (I won’t give them to you!) and that you’ve memorized the formulas for acids and those chemical names for common substances so that you’ll have something to find the percent composition of!

CHEMISTRY 11-18-14 Percent Composition from Tammy Skinner on Vimeo.

flickr photo by Τϊζζ¥

Physics 11-18-14 Intro to Work

Posted on November 18, 2014 by Ms. Skinner

PHYSICS: Funny thing about words, all this work you thought you’d been doing, was it? Work, I mean? Great intro to chapter 5! I think you’ll do great with the work problems, just remember everything from the last chapter and multiply by d!

PHYSICS 11-18-14 Intro to Work from Tammy Skinner on Vimeo.

flickr photo by *hb19

HON CHEMISTRY 11-17-14b Structure of the Atom, Pt. 1

Posted on November 17, 2014 by Ms. Skinner

HON CHEMISTRY: Here’s the second part of lecture from Monday on how scientists began to determine the structure of the atom and the existence of subatomic particles – well, the electron anyway. FYI – as we go on, make sure you know the name of the scientists, the name of their experiments, be able to draw a diagram of their experiment, and describe how they interpreted the experimental results that led to their discoveries. Wow, that’s a mouthful!

Click here for the video on the Cathode Ray Tube Experiment that Thompson did, and also for a little history on The Discovery of the Electron. Do you think there could be anything smaller? Than an electron, I mean??

HON CHEMISTRY 11-13-13 Structure of the Atom, Pt. 1 from Tammy Skinner on Vimeo.

Hon Chemistry 11-17-14a Modern Atomic Theory

Posted on November 17, 2014 by Ms. Skinner

HON CHEMISTRY: Pretty impressive little theory that Dalton came up with, huh? Good job making comparisons with the Modern Atomic Theory. In addition, I want you now to be able show a connection between the three laws we discussed today and Dalton’s atomic theory

HON CHEMISTRY 11-13-13 Structure of the Atom, Pt. 1 from Tammy Skinner on Vimeo.

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Chemistry 11-17-14 Mole Problems & Moles of Chalk Lab

Posted on November 17, 2014 by Ms. Skinner

CHEMISTRY: Awesome art! And great job on the moles of chalk lab! You set a land speed record for finishing a lab. Good job!

Here is a review of one of the mole problems. At the end of the vodcast, there are instructions for the lab, just in case you were out today. By the way, the lab can be written up on a sheet of paper – just make sure that you present your data and calculations like a scientist would!
🙂

CHEMISTRY 11-17-14 Moles of Chalk Lab & Mole Problems Homework from Tammy Skinner on Vimeo.

Web Post Comments Ideas

Posted on November 14, 2014 by Ms. Skinner

Are you having a difficult time understanding what a good web post comment is? In the future, you will probably be taking online classes where you will have to be part of online class discussion groups, and you’ll be graded on your comments and how you participate.

So…. Dr. Lauren Burrow from the Univ. of Memphis helped me come up with a plan that will hopefully help the You! My goal is for you to have STAR Web Post Comments. Hokey title, but maybe it will stick! Click here on the STAR Web Post Comments Idea Sheet for ideas for good comments that will receive full credit. Hope this will help!!

Below is the overview of this that we talked about in chemistry today. Hope you have a great weekend!!

CHEMISTRY 11-14-14 Mole Problem Review & Web Post Comment Ideas from Tammy Skinner on Vimeo.

flickr photo by Luca Argalia

PHYSICS 11-12-14 Forces with Pulleys and Friction

Posted on November 12, 2014 by Ms. Skinner

PHYSICS – Here’s a different take on forces – an application of horizontal forces, vertical forces, friction, all at once! Wow! Great job on solving the problem! Now go see if you can use what you learned to solve the second one. Check the vodcast for the problem that I want you to add to your homework.

Underneath the vodcast from today’s class is the vodcast from the help session this morning. We did quite a few problems – the fish on the line, #47 from the HW, etc. Physics, physics, physics!!
🙂

PHYSICS 11-12-14 Forces with Pulleys and Friction from Tammy Skinner on Vimeo.

flickr photo by Daniel Reid

PHYSICS 11-12-14 Help Session – Forces, Rriction – Problems Review from Tammy Skinner on Vimeo.

Chemistry 11-12-14 Molar Mass, Moles & Avogadro’s Number

Posted on November 12, 2014 by Ms. Skinner

CHEMISTRY: So how many water molecules do you think are in this drop? And now you know how to find out!!

Here’s the lecture from today on molar mass, and then using molar mass and Avogadro’s number as a conversion factor. You did a great job on thinking through the problems! Now go forth and practice them so you don’t forget!

Homework clarification: On the homework that is due Friday, if the questions involve math, you can just do b and c. And don’t forget the thLAB!! Be sure and read it now so you can get supplies!

CHEMISTRY 11-12-14 Molar Mass, Moles & Avogadro’s Number from Tammy Skinner on Vimeo.

flickr photo by ecstaticist

Chemistry 11-11-14 Moles, Mass, Atoms & Avogadro

Posted on November 11, 2014 by Ms. Skinner

CHEMISTRY: So… how big a bucket do you think we’d need to hold a mole of frogs? 🙂

Nope, not the furry brown creature that burrows underground, it’s a whole different thing! Here’s the lecture from Tuesday on moles, mass, and Avogadro’s number. I still say he has a cool name…

Homework clarification: Pg. 86 – 88: 12 – 16 ALL; AND b & c only on17, 18, 21 – 24, 28