Hon Chemistry 8-29-17 Scientific Notation & Density Problems

HON CHEMISTRY – Great job with scientific notation today! Hard to believe that you’ll be working with things smaller than a grain of pollen! Did you realize your calculator was so smart? Have you conquered it yet?

Great review on density problems! Remember, in chemistry we use math as a tool, therefore we might work problems a little differently in chemistry than you do in your math class.

When working these problems, don’t forget to follow these problem solving steps:

  • Analyze – write down what you’re given and what you’re looking for
  • Plan – write a formula where you isolate the unknown on one side by itself
  • Compute – plug in your data, numbers and units; then cancel the units, and if they cancel correctly, go on to the calculator. Be sure and give your answer what the correct units.
  • Evaluate – does your answer make sense, have you used the correct units, do you have the correct sig figs?

Tomorrow let’s apply density a different way!


flickr photo by Robert S Donovan

Chemistry 8-29-17 Significant Figures, Pt. 2 & Scientific Notation

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

And great job with scientific notation today! Did you realize your calculator was so smart? Have you conquered it yet?

Remember, the best way to really learn all of the things from this chapter is practice, practice, practice! That’s the reason it’s so important to do your homework! I give it to you so you can practice and put together all we talked about in class ….cuz I love you! šŸ™‚

Also super important – SI quiz tomorrow! Make sure you are actively studying for it, not just looking over it!!


flickr photo by Robert S Donovan

Physics 8-29-17 Swimmers & the Tortoise and the Hare

PHYSICS: Great job thinking through the problems today!

Remember a few things: You weren’t born knowing how to do these – give yourself a little time. On the really good ones, just one formula won’t work – begin with writing what your know. These are some of the hardest problems we’ll work in physics – not because the formulas are hard, but because knowing how to reason through them is so challenging.

You are doing a great job! Some good advice – go work them again! I promise, it will be good for you. Remember, don’t open the solutions you wrote in your notes! Try them without it!! If you have to, peek, but then don’t stop until you can work the entire problem through without looking!


flickr photo by Fausto Perez