Chemistry 11-19-19 Formula Mass & Molar Mass & Molecules

CHEMISTRY: So the little mole turns out to be a pretty big deal – and a very handy tool!!

Great job today! Here’s discussion on formula mass and molar mass, and then using molar mass and Avogadro’s number as a conversion factor. You’ve got a couple of great tools – so now think through the problems and go forth and conquer!! Be sure and practice them so you don’t forget!

Photo by ahmad kanbar on Unsplash

Hon Chemistry 11-19-19 Structure of the Atom

HON CHEMISTRY: Were you able to follow the connections the scientists made as they discovered the structure of the atom? Here’s the lecture from today. Do you think there could be anything smaller than protons, neutrons, and electrons? Hmmmmm……

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.

Don’t forget about the video clip we watched in class – and I’ve included a couple extra ones. they’ll help you review the different experiment that the guys like Thompson and Rutherford did. 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. Here’s the other one on The Discovery of the Nucleus.

By the way – how do you feel about playing scientist yesterday? How is what you did similar to the work of early scientists in discovering the structure of the atom?

flickr photo by Here’s Kate

Physics 11-18-19 Work & Energy

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

Hon Chemistry 11-15-19 Intro to Atomic Theory

CHEMISTRY: So how do you feel about being made from earth, air, water, and fire? 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?

Chemistry 11-14-19 Moles, Mass, Atoms & Avogadro

CHEMISTRY: So… how big a bucket do you think we’d need to hold a mole of frogs? πŸ™‚

Nope, not the furry brown creature that burrows underground, it’s a whole different thing! Here’s the lecture from Friday on moles, mass, and Avogadro’s number. I still say he has a cool name… πŸ™‚

flickr photo by Thomas Hawk

Physics 11-12-19 Friction & Forces on an Incline Problems Review

PHYSICS: Boxes and block, all slipping and sliding… Is it starting to make a little more sense? Here’s an old review of of some of the homework problems from this chapter – #36, 40, and 41 (I think). Below the lesson is an old help session. It has #46 – the “girl on a sled coasts down a hill” problem.

You’re getting it…keep sledding and watch out for net forces!

flick photo by Eva the Weaver

Help Session

Physics 11-12-19 A Look Back at Chapter 4 Concepts

PHYSICS: Leaves gracefully falling – can you apply concepts from this chapter to explain? Practice, practice practice the problems, but don’t forget the conceptual stuff! Here’s a short look (from last year) at some additional concepts.

How do parachutes work? What causes whiplash and how do seat belts work? If you get a chance, watch the Julius Sumner Miller videos on Newton’s 2nd law and 3rd law on You Tube. And also, here’s the link to the video clip I showed you on terminal velocity and the Physics of Skydiving I think they’ll all help a lot with the conceptual information

Photo by Sandis Helvigs on Unsplash

Chemistry 11-11-19 Oxidation Numbers & Pre-Test Quiz Info

CHEMISTRY: One man’s rust is another student’s lesson in chemistry! Great job today with oxidation numbers. Now it’s time to go and practice applying them!

God bless you as you study for the Chapter 7 Memorization Quiz for Wednesday! You need to have memorized (and be able to use!!): polyatomic ions, monatomic ions (but you can get these off the periodic table), acids, prefixes, and how to write and name chemical formulas. Click here for a copy of the PERIODIC TABLE you’ll use on the test – if you want to practice using it on your own.

That’s a lot, but you can do it! And make double dog sure you are working hard at practicing it all now!!

flickr photo by scottwillis

PHYSICS 11-11-19 Vertical Fish Forces & Forces with Pulleys and Friction

PHYSICS: Not sure if you’d ever find a fish on an elevator, but you sure could treat the problem like it was! Here a look at the fish on a line problem, and then, a different take on forces – an application of horizontal forces, vertical forces, friction, all at once!

Wow! Amazing job solving these problems – can you now go see if you can solve them by yourself? God bless you as you study! I’ll be praying for you!

Help session tomorrow, 7:20ish A.M. – unless by some remote chance we are out of school because of the weather.

flickr photo by Elisa Dudnikova

Hon Chemistry 11-8-19 Polymers

HON CHEMISTRY: Oh, my word! We finally finished the chapter! Have you had a chance to check out the Chapter 7 Stuff to Know sheet?

Also amazing – did you realize molecules could be that large? And so many of them! Don’t you think polymers are some pretty unique compounds? Let’s play with them next week!

Some items for contemplation: why are certain plastics recyclable and others not…and what about dishwasher and microwave safe?

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