Monthly Archives: November 2012

Hon Chemistry 11-30-12 The Electromagnetic Spectrum & Wave Properties of Light

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HON CHEMISTRY: Isn’t this a super cool picture of light? So tell me again, if we’re supposed to be figuring out electrons, why are we studying waves? Here’s the lecture from Friday that very thing. UPDATE: The vodcast below is the lecture from Friday – I finally remembered to upload it.

I’m thinking you’ve probably memorized the electromagnetic spectrum after that inspirational song; however, also sure you also know the uses of the different types (all except for long waves). Just in case you’d like to hear it again: Electromagnetic Spectrum Song

This other video clip on The Electromagnetic Spectrum also gives you a really unique look at the electromagnetic spectrum and begins to connect the lab from today and yesterday to what we are going to learning about in this chapter. By the way, just for the record, I love outside labs!

How’d you like the light problems so far? We’ll explore waves further Monday – make sure you bring a calculator to class!


flickr photo by kevin dooley

Chemistry 11-30-12 Structure of the Atom, Pt. 2

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CHEMISTRY – So do you have a better “feel” for how scientists like Thompson and Rutherford discovered the parts of something you can’t even see? Isn’t God awesome to give us minds to understand the world around us – even the parts we can’t see!

UPDATE: Here are the questions from the Sock & Can Model of the Atom Lab if you need them: Sock & Can Model of the Atom

Here’s the lecture from Friday on how scientists discovered protons and neutrons. Make sure you know the name of the scientists, the name of their experiments, be able to draw a diagram of their experiment, and describe how they interpreted the experimental results that led to their discoveries. By the way, here is the link the to video clip about the discovery of the nucleus that I was telling you about in class: The Discovery of the Nucleus. Along with the other videos, it will a great tool in studying for the test!

P. S. Did you figure out what was in your atom?


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PHYSICS 11-30-12 Power & the Horsepower Lab

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PHYSICS: Great job on the horsepower lab. Lotta noise – I’m thinking some of you took out some of your physics phrustrations on the stairs! Post your own horsepower numbers here. Did you notice that not all of the stairs are the same height? BTW: 1 Hp = 746 W and 1 kg = 2.2 lb. Post your lab results here. Who has the most power? And why?

Here’s the lecture from today on power (or rather from last year because I forgot to turn on the mic!). Now go forth and conquer the power problems! Power Worksheet


flickr photo by Thomas Hawk

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Hon Chemistry 11-29-12 Spectroscopy Lab

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HON CHEMISTRY: How’d you like playing with light? Kind of pretty, huh? Let’s begin to put it all together tomorrow!

Are you clear on how to turn in the lab report? Observations from the diffraction grating yesterday will be in two parts: 1) the written observation – answers to those four questions for BOTH types of light on notebook paper, and 2) your drawings of both kinds of light on card stock or heavy white paper, and then both drawings mounted on one sheet of construction paper. Be sure to label everything.

Observations from today with the spectroscope will be answered on the actual lab sheets/packet. Double check to make sure you answered every single observation and question. The entire packet is due Monday.

Hey – I hear it’s going to be warm outside tomorrow. And I’m pretty sure I like outside labs, soooooo…….!
🙂

Plumage on Flickr

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Chemistry 11-29-12 Structure of the Atom, Pt. 1

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CHEMISTRY – Chocolate chip cookie dough model of the atom? Here’s the lecture from Thursday on how scientists began to determine the structure of the atom and the existence of subatomic particles – well, the electron anyway.

Here’s the lecture from Thursday on how scientists began to determine the structure of the atom and the existence of subatomic particles – well, the electron anyway. FYI – as we go on, make sure you know the name of the scientists, the name of their experiments, be able to draw a diagram of their experiment, and describe how they interpreted the experimental results that led to their discoveries. Wow, that’s a mouthful!

Click here for the video on the Cathode Ray Tube Experiment that Thompson did, and also for a little history on The Discovery of the Electron. Do you think there could be anything smaller? Than an electron, I mean??


flickr photo by pixxiestails

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Chemistry 11-27-12 Dalton’s Atomic Theory vs. Modern Atomic Theory

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CHEMISTRY: Wow! Pennies turned to gold? Tell me again – how you could you prove that it was or wasn’t? Hey – what a lot of theory today! So the smallest thing that can be that thing is an atom. How do we know that? Well, we have to start at the beginning, and that’s Dalton’s Atomic Theory. If you didn’t get a chance to copy down the Modern Atomic Theory, you’ve come to the right place! Just listen to this vodcast and there you go!

How are you doing comparing Dalton’s Atomic Theory with the Modern Atomic Theory? If you will have it completed by Monday or Tuesday, I’ll be glad to go over it with you. Keep it in mind when you’re studying for the test on this chapter!

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Physics 11-29-12 Conservation of Energy, Etc., Problems

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PHYSICS – Great work on the problems today! I think it was a good idea for us to regroup and make sure you had the conservation of energy formula and the work-energy theorem down before we move on to the last part of the chapter tomorrow. Are you still trying to follow formulas, or are you starting to be able to think through the problems and and begin to make connections?

Be careful – don’t just start grabbing formulas and throwing in numbers. Make sure the formulas make sense – ask yourself every time why it makes sense for you to put that particular number in that particular part of the formula. And work them over and over and over until it comes naturally to you!

Here is the worksheet, Ch 5 Review Problems for homework tonight (#1 – 5, 10). Sorry it’s late, I had to go get a flu shot! 🙁


flickr photo by -BeNnO-

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Physics 11-27-12 Law of Conservation of Energy

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PHYSICS: So why is the first hill of a roller coaster always the highest? Here’s the lecture from Tuesday on the conservation of energy. Great job on the concepts and problems today – let’s put it to practice tomorrow, and even this weekend on that take-home lab. (Speaking of which – do you need a bead?)

Homework tonight is changed a bit: Pg. 179 – 184: 26 – 34 AND 39 – 43; tomorrow add the rest, 46 – 49, 51 to the review worksheet.

Hey, if you were to design a roller coaster, what would it look like?!? Don’t forget to print & read the Roller Coaster Lab
🙂


flickr photo by thecrypt

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Chemistry Help Session Wednesday Morning, 7:15ish A.M.

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CHEMISTRY: Good luck studying for your test! Do you need any extra practice? Help session tomorrow morning at 7:15ish. I’ll post the lesson from today on Dalton’s Atomic theory in a bit – after you’ve taken the test tomorrow and Thursday. Holler if I forget!

Have you checked out the study suggestion sheet on Edline? Chapter 7 Stuff to Know & Know How to Do

Tomorrow’s test will be mostly multiple choice on memorization, application of concepts like finding oxidation numbers, short mole problems, all the polymer stuff, and lots of chemical formulas to write and name. Thursday’s test will be mostly the larger problems – like bigger mole problems, percent composition, finding empirical formulas and molecular formulas from scratch. BUT – be prepared for some of everything on each part!

Worst thing you can do? Just read over your notes – even if you do it a million times. Best thing to do? Practice! Take your notes and make practice test questions with different colored highlighters. Practice the memorization by making quizzes for yourself, flashcards, and quizlet.com. Practice writing and naming chemical formulas, practice working the mole problems, practice percent composition problems, and practice empirical formula and molecular formula problems! God bless you as you study – I’ll be praying for you!

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Chemistry 11-26-12 Chapter 7 Test Overview & Help Session

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CHEMISTRY: I hope you had a wonderful Thanksgiving! Now back to the real world. Good luck as you continue studying for the test! Here’s the overview we did today. Also, did you find the Chapter 7 Stuff to Know sheet?

First priority – make sure that you have memorized EVERYTHING. Then, go to sciencegeek.net and make sure you can write and name chemical formulas. Practice, practice, practice!!!

Next start practicing the different kinds of problems – do at least three of each one of them. And also try those on sciencegeek.net. Another great place to practice concepts and application of concepts is the online textbook and the review games that are there.

One last help session – Wednesday morning, 7:15ish A.M. Good luck – I’ll be praying for you! You can do it!!.


flickr photo by Anatoly Kraynikov