PHYSICS: So when you were floating in the pool this summer, did you enjoy your fellowship with buoyant forces? 🙂 From Wednesday – Archimedes’ Principle.
Great topic for investigation! Speaking of which – what did you find? When the kid jumped out of the boat, did the water level rise, fall, or stay the same? Hmmmm…..
CHEMISTRY: Wow!! Great job today with stoichiometry!! Now it’s time to put everything you’ve learned from the last few chapters together. It’s like cooking – figuring out what you need to get what you want. Slightly different ingredients, though. Don’t forget molar mass and mole ratio!
HW INFO – To find the pages for tonight’s homework, either go the the Textbook HW Tab and you’ll find the pages there. Also you can go to the online textbook, open the chapter, and then in the section where you can enter page numbers, enter R109. Either of these will take you to the pages for tonight’s homework.
Photo by Monika Grabkowska on Unsplash
HON CHEMISTRY: So ordinarily it looks like just any old hunk of rock, but this is a picture of uranium ore under UV light. Pretty cool, huh?!? Here’s our beginning discussion of the unique properties of radioactive nuclides. And as a bonus, this vodcast has a head start at looking at nuclear equations. Woohoo!!
CHEMISTRY: Here’s our very short look at the positive tests for carbon dioxide, oxygen, and hydrogen gases for the experiment: Making and Testing for Gases. If you were absent on Wednesday, be sure and watch this vodcast – it’s required before you can do the lab. Make sure you have shown me the three balanced equations you’ll need for the experiment. I think you’ll have lots of fun with this one. 🙂
Photo by Yaoqi LAI on Unsplash
HON CHEMISTRY: Recognize this symbol?! Here’s the lesson for today. First, a look at some of the homework from last night, and then onward to chapter 21!
Speaking of – 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!!
By the way, when you get a chance, read about the life of Marie Cure – fascinating woman of science with an incredible story!
HON CHEMISTRY: Here’s the full lesson for Monday – even the part we didn’t quite get to! Isn’t God awesome to give us minds to understand the world around us – even the parts we can’t see!
Today we talk about isotopes and calculating average atomic mass. Make sure you practice all the ways to write nuclear symbols. Also make sure you can use them to determine the number of protons, neutrons, electrons, etc., AND be sure you can use the formula to find average atomic mass!
Here are some answers for tonight’s homework:
#19) 39.95 u
#20) 10.00 u
#34) 9 x 10^12 more dense
Can you believe atoms are that small – and the nucleus even waaaaaay smaller! The thumbnail is a picture of atoms from the IBM Almaden Research Center. These are iron atoms on top of copper. Being able to move atoms around like this was a giant leap in the field of nanotechnology! (Sorry about that, bad pun! 🙂 )
PHYSICS: Wait! There’s a fourth law? Yep – Newton’s law of universal gravitation! So when you jump off of something, the Earth moves, huh?
You’ve learned little g, now you know big G! Good job setting up the problems, also make sure you can apply the concepts.
Ready to escape? 🙂
Physics 2-10-16 Newton's Law of Universal Gravitation from Tammy Skinner on Vimeo.
CHEMISTRY: God bless you as you prepare for your test tomorrow!! Here’s our overview of the test from today. Have you checked out the Ch 8 Test Stuff to Know sheet? Good stuff!
Key to a good test results – memorize what you’re supposed to have memorized and PRACTICE EVERYTHING! You’ve got this!
HON CHEMISTRY: So how do you feel about mixing chemistry and history? Here’s the intro we did on how we ended up with the atomic theory. Had you ever heard of Lavosier, Proust, and Dalton?
Pretty impressive little theory that Dalton came up with, huh? Were you surprised as you made comparisons with the Modern Atomic Theory? Could you now take it a step further and show connections between the three laws we discussed today and Dalton’s atomic theory?
PHYSICS: Spinning fast and spinning slow! Can you explain now using the conservation of angular momentum?
Since I didn’t video all the demos, I’ve gone back an posted a vodcast from last year, but RG did video Samuel for me – that’s below the lesson. Great job today with all of our volunteers!!
Samuel & the Conservation of Angular Momentum