Physics 3-23-12 Waves

PHYSICS: Happy Friday! Here’s the lecture on the properties of waves. Problems are pretty simple for you, I think. Do you remember the main formula from chemistry? Speed = wavelength x frequency (c = λf).

And hey, did you figure out that problem from the end of class yet? It’s not that difficult, really. 🙂 Bring me the answer on Monday, and let’s take waves a step further then. Have a great weekend!

Chemistry 3-22-12 Intro to Chemical Bonds

CHEMISTRY: Welcome back to chemistry! Ready to begin another chapter? Here’s the first lesson from chapter 6, the introduction to chemical bonds. Patience! We’ll get to the good application stuff in just a bit!

BTW – Homework goes with what we did today: Pg. 209 – 213: 1 – 8, 10 – 15. And don’t forget the Science In the News for tomorrow!

Hon Chemistry 3-22-12 Balancing Chemical Equations – Pt. 2

HON CHEMISTRY: Okay, maybe balancing equations isn’t exactly like this, but….. Here are the rest of the notes on balancing equations. Plus – a couple of examples for practice.

Homework for tonight is writing up the lab on chemical change for tomorrow. And, did I mention practice, practice, practice balancing equations?

Hon Chemistry 3-21-12 Describing Chemical Reactions

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

Hon Chemistry 3-2-12 Intermolecular Forces

HON CHEMISTRY: Well, here it is, the very last lecture from chapter 6 – intermolecular forces. (Don’t forget they’re also called van der Waals forces!) Tons of application, from bugs walking on water to little fishes breathing dissolved oxygen.

Good luck studying for the test – have you practiced Lewis structures and drawing ionic bonding? Great idea!! And don’t forget The Unit 3 section would be a great place to practice and check to see if you’ve learned what you think you’ve learned. I’ll be praying for you! You can do it!

And good luck with the 3-D Molecules Presentation! Holler if you have any questions. Don’t forget that if you are absent Monday, you can email it to me and I’ll put it on the server for you. Have a great weekend!

Image Source Gaurawa at

Chemistry 3-1-12 Periodic Trends, Pt. 2

CHEMISTRY: Wow! We finally finished the chapter!! Here’s the lecture from Thursday – second ionization energy, electron affinity, ionic radii, valence electrons and electronegativity. Lots of stuff to know, and lots of stuff to be able to apply!

Good luck studying for your test – you need to start that today! Have you checked out the Chapter 5 Stuff to Know Sheet on Edline? And don’t forget The Unit 2 section would be a great place to practice and check to see if you’ve learned what you think you’ve learned.

Also, here’s a copy of the Chapter 5 Review Worksheet – which isn’t really a review worksheet, more of a sample test. Good luck studying! I’ll be praying for you!!

flickr photo by doncon402

Hon Chemistry 3-1-12 Water Wire Lab

HON CHEMISTRY – I really am excited about what happened in lab today! So it worked, and then it didn’t, and then it did! That’s great! I love the way you kept experimenting with ideas to see how to make those light bulbs light up! Do you know that’s when you often learn the most and grow the strongest – from failure?

Here is a copy of the Water Wire Take Home Lab. Let me know if you have any questions about what to do with this take home lab. I want you to do all parts of the lab. You will need to get the light bulb from some place like Radio Shack. I have skinny popsicle sticks that will work really well, if you’d like to use them. One word of advice – try it first with a smaller voltage battery than the 9V battery suggested on the sheets. Last year, we found that the 9V batteries kept blowing the light bulbs. (After today, does that make sense?) You might also consider getting a light bulb with a higher voltage, but I can’t promise how it will work.

Don’t forget to also do the last part of the lab – to test five different liquids at your home to see if they are ionic solutions. You will write this up in your lab book and you will include all your results in the Observations section of your lab report. Check your syllabus for the exact due date, but it’s not due until after spring break. Good luck with it, and have fun!

light bulb