CHEMISTRY: I like the way you are catching on to significant figures! Here are the last of the notes on calculating with Sig Figs!

IMPORTANT: If you are going to be away from a computer Saturday, be sure and finish the thLAB: Building Your Balance early and have it uploaded to your Google Drive Shared Folder and turnitin.com BEFORE you leave!! Have you read the web post about the thLAB? You need to do so!!!

Two more super important things: Make sure you are actively studying for the SI quiz! Also super important – keep up with your homework!! The reason I give it to you so you can practice and put together all we talked about in class ….cuz I love you! 🙂

HW UPDATE for Regular Chemistry: The homework from the book for tonight will be due Friday in class. The SI quiz is moved to Tuesday, Sept. 6.

Chemistry 8-31-16 Significant Figures, Pt. 2 from Tammy Skinner on Vimeo.

flickr photo by Igor Spasic

CHEMISTRY: This is pretty cool!! Have you started making your balance? This thLAB is going to help you understand how a balance works! Here’s a hint – tape the pencil down if you are having trouble with it moving around!

A couple of IMPORTANT things about doing and writing up thLABs:

• Yes – you ALWAYS do all the questions on labs.
• Always to the extension on thLABs if there is one, but if you are not sure, ASK!
• The actual masses of the coins can be found on the Internet. Google it!!
• Yes, you find your percent error on each coin – make sure you show your work with formula and units!!
• Be sure and give yourself plenty of time to upload to the Google Drive Assignment Turn-In folder AND Turnitin.com!
• The info for setting up your turnitin.com account is on the first day Lab Turn In Info sheet – it’s under the lab and worksheet tabs. That sheet will give you the password and show you where to find the other instruction.

Holler if you have any other questions. Have fun with your lab!!

Image source: Alex Dean

CHEMISTRY – So which is more important, accuracy or precision? Great discussion on causes of error in the lab and how to prevent them! Watch out on this particular vodcast – I almost did one of the examples wrong. See if you can find it before I corrected the mistake!

So you’ve been using been using significant figures all along when you were measuring in the lab! Now the other half – using them in calculations will be no big deal at all!

Hey – how are the Scavenger hunt and the thLab going? Be sure and read the post above this one on thLAB: Building Your Balance. AND make double sure you give yourself plenty of time!!

And in the middle of all of this lab stuff – don’t forget to be studying for the SI quiz!!

UPDATE: I’ve replaced the vodcast with a new/old one that hopefully has better audio!

Chemistry 8-28-15 Accuracy and Precision & Intro to Significant Figures from Tammy Skinner on Vimeo.

flickr photo by jambe

CHEMISTRY – So you think Goodman Road is getting crowded? How’s this for a “high density” city? Great finish to derived units today. Can you apply what you’ve learned? Hmmmmm………

Chemistry 8-29-16 Derived Units from Tammy Skinner on Vimeo.

flickr photo by chromogenic

CHEMISTRY: Have you checked your grades on Edline? If you have an ** or a 0 for any of the Tech 101 assignments, you must make corrections to receive credit for the assignment – and credit for the class. Check your grades on Edline to see if this applies to you and then read the notes below to learn what you must do.

Grade is X
If you have an X for one of the Tech 101 assignments, that means you have something wrong and need to fix it before you can get credit. I want you to be able to find and correct you own mistake. Let me know by texting me on Google Voice when you correct your mistake. Also let me know if you are having trouble making your corrections! Here are some hints of things to check.

• Did you title the assignment correctly?
• Did you scan the Lab Safety Rules and the Lab Apparatus as TWO separate PDFs? You should have 3 separate PDFs in your Chemistry Shared Folder.
• Did you put all the pages of the Lab Safety Rules in one PDF?
• Did you put all the pages of the Lab Apparatus in one PDF?
• Did you put the pages of your scans in the correct order?

Grade is 0
If you have a 0 for one of the Tech 101 assignments, that means you didn’t turn in the assignment, or at least it’s not in your Google Drive Chemistry Shared Folder or in Turnitin.com. You must still complete the assignment to get credit for this class. Let me know by texting me on Google Voice when you complete the assignment and I will check you off the list. Also let me know if you are having trouble!

CHEMISTRY – Hey guys, so is all the info on SI measurements starting to come back to you? Here’s the lecture from Friday. I’m sure it’s mostly review from your physical science days, but it’s a great opportunity to refresh what you’ve learned and to get ready to begin using it!

Did you remember the prefixes? Start work on memorizing them NOW – Si quantities, units, and SI prefixes. For the prefixes, also make sure that you can tell me how many of something in the larger one. (That’s what I explained in class.) The quiz on them for REGULAR CHEMISTRY will be next Wednesday, August 31, for HONORS CHEMISTRY the quiz will be Friday, September 2.

Chemistry 8-26-16 SI Measurements from Tammy Skinner on Vimeo.

flickr photo by Nils Geylen

CHEMISTRY – Great fun with Oobleck today! Were you successful in using the scientific method? Here is the rest of lecture from today on using the scientific method.

CAUTION: Be sure and read the questions on the Oobleck sheet VERY carefully as you answer! Lab sheets are due tomorrow in class.

Chemistry 8-25-16 Using the Scientific Method, Pt. 2 from Tammy Skinner on Vimeo.