Hon Chemistry 4-8-11 Synthesis & Decomposition Reactions

HON CHEMISTRY: Wow! So that’s where the pretty light comes from! Great job on synthesis and decomposition reactions. Here’s an old lecture on both of these, if you need to review. Now go and practice what you learned! πŸ™‚

Physics 4-7-11 Sound Intensity and Resonance

PHYSICS: Hey guys, here’s the lecture from Thursday on sound intensity and resonance. Couple of items 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 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 it Monday. Have a great time with the video tomorrow!

Chemistry 4-7-11 Chapter 7 Test Review

CHEMISTRY: Good luck in studying for the test tomorrow! Here’s an old test review that might help you. Also, did you find the Chapter 7 Stuff to Know sheet on Edline? Click back on the name, if you need one. I know it seems like a lot, but you can do it! First priority – make sure you can write and name chemical formulas!!! Practice, practice, practice! Then start practicing the different kinds of problems – do at least two of each one of them. And try sciencegeek.net. That’s always some good practice. Good luck – I’ll be praying for you!

Chemistry 4-6-11 Polymers

CHEMISTRY: Well, we finally finished the chapter! Did you realize molecules could be that large? And so many of them. But don’t you think polymers are cool? Here’s the lecture from Wednesday. Did you get a copy of the Polymer Worksheet? Click here if you need it: Polymer Worksheet. Some items for contemplation: why are certain plastics recyclable and others not…and what about dishwasher and microwave safe? Help Session tomorrow morning at 7:15!

Image source: http://www.packtech.ca/pb/images/img32161428fffbe41e07.jpg

Hon Chemistry 4-6-11 Practice Balancing Equations

HON CHEMISTRY: Do you need help balancing equations? Here’s a few minutes of practice doing just that. Don’t forget to first check to see if all of your formulas are correct. Then grab an eraser and practice, practice, practice! You can do it!! We’re going to crank it up a notch tomorrow!

flickr photo by Thomas Hawk

Chemistry 4-5-11 Molecular Formulas

CHEMISTRY: Hey guys! Awesome job with empirical formulas, and now you’ve conquered writing molecular formulas! It’s just like writing empirical formulas, but with a twist at the end! By the way, if you’d like some practice or if you have questions – help session Thursday morning, 7:15 A.M. πŸ™‚

flickr photo by Sebastian Mary

Hon Chemistry 4-5-11 Describing Chemical Reactions

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

Chemistry 4-4-11 Empirical Formulas

CHEMISTRY: So, would you like to be Greg on CSI? Great start on empirical formulas today. The hardest part is that it’s not a set formula for you to plug and play, but if you’ll keep in mind that you’re really just looking for subscripts which are just moles, you’ll be able to think it through. Percent to mass, mass to moles, moles to smallest whole number ratio. There’s a little added step you might have to add to the end – we’ll go over it tomorrow. Also tomorrow – molecular formulas.

Image source www.dnr.mo.gov/env/esp/images/prettytesttubes.jpg