Monthly Archives: October 2013

Honors Chemistry 10-31-13 Chapter 7 Test Review

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HONORS CHEMISTRY: Do you feel like you are starting to go a little crazy? Lots and lots to be responsible for in this chapter, huh? God bless you as you study for the test! Since I forgot to turn on the mic(!), here’s an overview of the test that we did last year – I thought you might find it helpful. Also, did you find the Chapter 7 Stuff to Know sheet on Edline? Click here on the name, if you need one. I know it seems like a lot, but you can do it! (BTW – I changed my mind and decided that you don’t have to know diatomic molecules for the test, just for the future.)

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!!! Then start practicing the different kinds of problems – do at least three of each one of them. And also try those on sciencegeek.net. That’s always some good practice. God bless – I’ll be praying for you! You can do it!!

HON CHEMISTRY 10-31-13 Chapter 7 Test Overview from Tammy Skinner on Vimeo.

flickr photo by libraryman

Physics 10-31-13 Friction & Normal Force

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PHYSICS: So why don’t things that are moving just keep moving? Here’s the intro lecture on friction.

Remember a few key things. Net forces produce acceleration. You can find Ff a couple of different ways – it’ll be part of a net force equation and can be found from the coefficient of friction equation. If and ONLY if your object is moving at a constant velocity, Ff will equal Fa. Fn is only sometimes equal to Fw. If your object is pulled at any angle (or pushed), Fn will be a part of Fnet in the vertical direction.

Whew!

Physics 10-31-13 Friction & Normal Force from Tammy Skinner on Vimeo.

flickr photo by kbaird

Physics 10-30-13 Newton’s 2nd & 3rd Laws

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PHYSICS: So an object at rest can be at equilibrium, but what about an object that is moving? And how does equilibrium relate to Newton’s first law? Or Newton’s second law? And what if you don’t have balanced forces. Here’s the lecture from today on just that! Now remind me, net forces produce what?

And, for your viewing pleasure, enlightenment and overall edification – Julius Sumner Miller on Newton’s Second and Third Laws. Good stuff! you’ll find them extremely helpful with the conceptual part of the test. I strongly encourage you to watch them!

PHYSICS 10-30-13 Newton’s 2nd & 3rd Laws from Tammy Skinner on Vimeo.

Photo: Joe Armao

Hon Chemistry 10-30-13 Polymers

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HON CHEMISTRY: Oh, my word! We finally finished the chapter! Have you had a chance to check out the study suggestion sheet on Edline?

Also amazing – did you realize molecules could be that large? And so many of them! But don’t you think polymers are cool?

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

Help session tomorrow morning, 7:15ish A.M.
🙂

HON CHEMISTRY 10-30-13 Polymers from Tammy Skinner on Vimeo.

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

Hon Chemistry 10-29-13 Empirical & Molecular Formula Practice

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HON CHEMISTRY: I was really impressed today with the progress you’ve made on mastering empirical and molecular formulas! Here’s the short review that we did on #52 and the problem from the back of the book.

Are you starting to catch on to the steps? It will be good for you to memorize the steps, 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!

Help Session Thursday morning, 7:15ish A.M.

HON CHEMISTRY 10-29-13 Empirical & Molecular Formulas Practice from Tammy Skinner on Vimeo.

flickr photo by Darwin Bell

Physics 10-29-13 Equilibrium Problems Practice

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PHYSICS: Great work today thinking through these problems! A couple of things that work for me – draw them first. Then go back through and separate resultants into components. If an object is in equilibrium, then there are no net forces – all the forces in the x direction balance – everything left equals everything right, and all the forces up equal all the forces down.

You’ve got all the ammo you need, now go forth and conquer!

UPDATE: Answers below:

  1. Fn = 3430 N upward against feet
  2. Fn,1 = Fn,2 = 1890 N upward on each foot
  3. Fforward = 4.59 N
  4. FT,1 = FT,2 = 1760 N
  5. FT,1 = 1.36 × 103 N and FT,2 = 680. N

PHYSICS 10-29-13 Equilibrium Problems Practice from Tammy Skinner on Vimeo.

flickr photo by loop_oh

Chemistry 10-29-13 Moles, Mass, Atoms & Avogadro

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CHEMISTRY: So… how big a bucket do you think we’d need to hold a mole of frogs? 🙂 Nope, not the furry brown creature that burrows underground, it’s a whole different thing! Here’s the lecture from Tuesday on moles, mass, and Avogadro’s number. I still say he has a cool name…

CHEMISTRY 10-29-13 Moles, Mass & Avogadro from Tammy Skinner on Vimeo.

flickr photo by Thomas Hawk

Chemistry 10-28-13 In Class Assignment

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To My Beautiful Chemistry Students: How was the Pre-Test? Were you ready for it? Here is assignment for today after you finish the Pre-Test:

A great way to practice writing and naming chemical formulas correctly is to go to sciencegeek.net  and practice the Chemistry Review Activities . Today, after the pre-test, I want you to practice three sections in Unit 3 would be very helpful. Click on any of the sections to go the the site.

You don’t have to write anything down, but I do want you to practice each section over and over until you can go through each one without making any mistakes! If you don’t finish today in class, this would be a great way to keep studying when you get home.

Be careful not to get distracted once you are begin work on the laptops. You are to work ONLY on this assignment until the bell rings. Have a great day!
🙂

Hon Chemistry 10-28-13 In Class Assignment

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To My Beautiful Honors Chemistry Students: Today I’m giving you a head start on a virtual lab that you are going to be finishing at home. It is the vLAB: Determining an Empirical Formula. You will also do Extension 1.

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! You won’t be able to save the actual lab, just your lab report. You could save it to your Shared Student Folder at school and email it to yourself, or you could save it to your Google Drive folder as a Word Doc and then you’d be able to access it from home. When you are finished, you will save it as a PDF to your Google dropbox. Check the syllabus for the due date.

Have a great day!
🙂

Physics 10-28-13 In Class Assignment

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To My Beautiful Physics Students: Today I’m giving you a head start on a take home lab that is due Wednesday: thLAB – Unbalanced Forces (the extension is not required, but recommended). Today, in class only, you may work in groups of two people.

If I’ve forgotten to copy the boats for you – that will make sense later, you can ask Mrs. Jackie for a transparency and use the printer in the back of the room to make ONE copy of the back page of the lab sheets on ONE transparency sheet. One sheet is enough for the whole class. You may ask Mrs. Jackie for any other supplies you need. This thLAB is due Wednesday on notebook paper. Include both answers from the procedure as well as the post lab questions.

OPTIONAL: If you’d rather save the lab for home and work together on the Equilibrium Worksheet problems – as long as it is a very constructive, collaborative effort, you may.

Have a great day!
🙂