thLAB: Building Your Balance

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!!
Balance 2
Image source: Alex Dean

Chemistry 8-30-16 Accuracy and Precision & Intro to Significant Figures

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