HON CHEMISTRY: Welcome to nuclear chemistry! No, really – I think you’ll be surprised how much nuclear chemistry is already a part of your everyday life. And now you know where E=mc2 came from!!
Here’s the lecture fOR Wednesday on a bit of the “history” of radioactivity. By the way, when you get a chance, read about the life of Marie Cure – fascinating woman of science with an incredible story!
Chemistry 1-5-15 Intro to Radioactivity from Tammy Skinner on Vimeo.
PHYSICS: Wow! Do you realize what we just did? We finished the chapter! Well, we’ll add this small lecture on simple machines from chapter 7 to the chapter 5 test – but we’re done!
Did you remember this stuff on simple machines from your physical science days? I don’t think you’ll have any trouble with efficiency and mechanical advantage problems. Give them a whirl and let me know!
How do you think the efficiencies of machines compare? Could you design a method to test that? You don’t need no stinkin’ lab sheets! Do you?
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Physics 11-20-15 Simple Machines from Tammy Skinner on Vimeo.
CHEMISTRY: Here is the virtual lab assignment for Wednesday and Thursday. It is the vLAB: Determining an Empirical Formula. You will also do Extension 1. The assignment is due Monday, Dec. 5, by midnight – save sheets as PDF 2X.
Be sure and use the lab sheets here and NOT sheets on the textbook site that come with the virtual lab! Ask Mrs. Jackie to get you the headphones if you don’t have your own ear buds.
Also be sure and save your work on Wednesday so you don’t have to start over! Hint: Copy the sheets from the Word doc to a Google Doc so that you can save your work and keep working on it the next day! Here’s how:
Be sure and listen to and/or read all of the parts of the lab carefully!!
PHYSICS: From Tuesday, a couple of work and conservation of energy problems. I love how you are thinking through theses! Keep it up!
Physics 11-29-16 A Sled and a Skier from Tammy Skinner on Vimeo.
CHEMISTRY: 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 for Tuesday. Don’t forget the Polymer Worksheet! Put the answers on sheets of notebook paper.
Some items for contemplation: why are certain plastics recyclable and others not…and what about dishwasher and microwave safe? Hmmmmm…
Chemistry 11-29-16 Polymers from Tammy Skinner on Vimeo.
Image source: http://www.packtech.ca/pb/images/img32161428fffbe41e07.jpg
CHEMISTRY: I was really impressed today with the progress you’ve made on mastering percent composition and empirical formulas! Now it’s time to move on to molecular formulas!
Remember what molecular formulas are – just a multiple of the empirical formula. Keep that concept in mind, and you’ll have no problem remembering to divide the molecular formula mass by the empirical formula mass to find X! Easy peasy!
HW UPDATE: Yes! I do want you to do all of the homework for Monday night, even though you’ve done a few of these already. However, you don’t have to do them again for Wednesday’s homework. Also, be sure and bring at least two STEM articles to class on Friday for the Science In the News assignment. This is a regular SItN assignment, but you can also do two extra for extra credit.
Are you starting to catch on to the steps? It will be good for you to memorize them, but would it not be just tons better to understand why you need each step – backwards and forwards, so then you wouldn’t need to memorize them at all!
Chemistry 11-28-16 Molecular Formulas from Tammy Skinner on Vimeo.
HON CHEMISTRY: Awwww….aren’t they cute! So what do you think the average atomic mass of puppies is?
Here’s our discussion for Tuesday on isotopes and calculating the average atomic mass of isotopes. Isotopes…. not puppies. ๐
Happy Thanksgiving! I’m so very thankful for you!! ๐
Hon Chemistry 11-12-15 Isotopes & Average Atomic Mass from Tammy Skinner on Vimeo.
CHEMISTRY: Here is the lesson for Tuesday. You conquered percent composition and then turned it around to find empirical formulas!
UPDATE: After you watch the vodcast today, here is the assignment that I want you to work on in class. If you don’t finish, it will be for homework. In Class Assignment: Pg. 232: Practice 1 – 3 (Middle of page) AND Pg. 242: 34, 36, 37
Be sure and practice – especially empirical formulas! If you don’t it’ll get all turned around and you’ll end up leaving off an important step. 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. Easy peasy!
When we get back from Thanksgiving, we’ll talk about a little step you get to add at the end. Speaking of which, Happy Thanksgiving! I’m so very thankful for you!
I wonder what the percent composition of bubble gum is? ๐
HON CHEMISTRY 10-28-14 Percent Composition & Empirical Formulas from Tammy Skinner on Vimeo.
PHYSICS: Funny thing about words, all this work you thought you’d been doing, was it work after all?
Great job today on making connections between work and energy! I think you’ll like using the work-energy theorem, it’ll save you some time and a couple of steps. Don’t forget about friction!
Physics 11-17-16 Work & Energy from Tammy Skinner on Vimeo.
flickr photo by *hb19
CHEMISTRY: Awesome art! And great job on the moles of chalk lab! You set a land speed record for finishing a lab. Good job!
Here is a review of one of the mole problems. At the end of the vodcast, there are instructions for the lab, just in case you were out today. By the way, the lab can be written up on a sheet of paper – just make sure that you present your data and calculations like a scientist would!
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November16 1013 c2 2016 from Tammy Skinner on Vimeo.
