Monthly Archives: January 2023

Chemistry 1-17-23 Polymers

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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.

Help session Thursday morning, 7:30 AM.

Some items for contemplation: how does the function of something relate to its structure. For example, why are certain plastics recyclable and others not…and what about dishwasher and microwave safe? Hmmmmm…


Image source: http://www.packtech.ca/pb/images/img32161428fffbe41e07.jpg

Chemistry 1-11-23 Molecular Formulas

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CHEMISTRY: Hey guys! Awesome job with empirical formulas, and now you’ve conquered writing molecular formulas! Here’s the lecture from Wednesday. It’s just like writing empirical formulas but with a twist at the end!

HW UPDATE: All the rest of the homework that was for Tuesday is now due Friday. The homework that is on the syllabus for Thursday (the five extra problems) is changed for now and will be due next week.

Have you started preparing for the test? It will be over ALL of chapter – plus the small bit from chapter 3. Be sure and checked out the Stuff to Know sheet for all of chapter 7 under the Test Info tab!


flickr photo by Sebastian Mary

Physics 1-11-23 Collisions Problems Review 2

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PHYSICS: Great job with some of the more advanced momentum and energy problems! Here’s a look at the student in the middle of a frozen pond, bird on the wire, car crash with coefficient of friction, and the billiard balls.

Ready for the test? Take another look at some of the concepts!


Photo by Jenny Salita on Unsplash

Hon Chemistry 1-11-23 Double Replacement & Combustion Reactions

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HON CHEMISTRY: We had to go fast, but do you realize what we did? We finished all 17 types of reactions today! We’ll practice them tomorrow since we had to go so fast today.

Careful when you work with any of these! For all single replacement reactions and reactions involving forming or decomposing oxide, be sure and refer to the Activity Series. Yes, you do get to memorize the Activity Series for the test – for the big test, not for the coming up quiz!

Are you working on memorizing all 17 types of reactions?! But don’t just memorize them. Make sure you can apply them as well. When you start to work any equation, first determine what type of reaction it is, then figure out what rule applies and follow it to determine the products. I believe in you! You can do it!! (and yes, I realize I am repeating myself, but I do and you can!)

Physics 1-10-23 Collisions Problems with Energy & Bouncing

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PHYSICS: Great job on the problems so far!! Here’s our look how kinetic and potential energy get involved – dart in the block of wood and the bird on the swing. This cute little bird isn’t on a swing, but he is one I came beak to nose with on a mission trip to Costa Rica!

What about even more practical applications? Hmmmm…..

Hon Chemistry 1-10-23 Single Replacement Reactions & the Activity Series

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HON CHEMISTRY: Moving right along with the 17 types of chemical reactions, here are the single replacement reactions – and you also got a head start on the activity series!

This makes 15 reactions so far, and we’ll do the rest tomorrow. Careful though, memorize, but don’t just memorize them. Make sure you can apply them as well. When you start to work any equation, first determine what type of reaction it is, then figure out what rule applies and follow it to determine the products. I believe in you! You can do it!!


flickr photo by bobtravis

Chemistry 1-10-23 Empirical Formulas

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CHEMISTRY: So, would you like to be Greg on CSI? Great work with empirical formulas today!

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.

HOMEWORK UPDATE: Omit #38 & 39 for now.

Let’s crank it up a notch tomorrow! ๐Ÿ™‚


Image source www.dnr.mo.gov/env/esp/images/prettytesttubes.jpg

Chemistry 1-9-23 Percent Composition

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CHEMISTRY: Great job today! Way to apply chemistry to your everyday life!!

I think you’ll find that percent composition problems are super easy to catch on to. First, though, be sure you know which “type” of percent composition you’re trying to fine. Also make sure you can write chemical formulas (I won’t give them to you!) and that you’ve memorized the formulas for acids and those chemical names and formulas for common substances. It’s just plug and play from there! ๐Ÿ™‚


flickr photo by ฮคฯŠฮถฮถยฅ

Hon Chemistry 1-9-23 Synthesis & Decomposition Reactions

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HON CHEMISTRY: Oooohhhh! So that’s where the pretty light comes from! Great job on these reactions! Now go forth and practice what you learned! (The balancing equations part, not the playing with magnesium part!) ๐Ÿ™‚


Photo by Yasemin K. on Unsplash

Physics 1-9-23 Collisions

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PHYSICS: Collisions โ€“ theyโ€™re all around us and they all obey the law of conservation of momentum. Here’s more specific information about the proper way to differentiate and name them.

Great job with the conceptual review and setting up the problems! As you practice tonight, be sure and check for connections between the conservation of momentum and the conservation of energy. ๐Ÿ™‚


flickr photo by chavil brasil