High school lab science?

Plant, animal, or mineral?

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knobren
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Postby knobren » Fri Jun 15, 2007 11:51 am

Sure. No problem.

phiferan
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Postby phiferan » Wed Aug 15, 2007 2:20 pm

Thank you so much, Knobren, for the PBS, NOVA, Science videos on line resource. I was purchasing them from PBS; but, this will save me so much as my child and I can now watch them for free. Also, because I was purchasing them, I had to be selective about which DVD’s to buy; but, now we can watch all the ones that interest us. Thanks again and God bless.

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knobren
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Postby knobren » Wed Aug 15, 2007 5:49 pm

Teachers get most of their science supplies from Ward's Natural Science, Carolina Science, Fisher Science Education, and Nasco Science. These companies also sell kits that would be appropriate for homeschoolers. Some of the websites for these companies also have information/newletters/etc. for homeschoolers. They also offer science books, videos, and software.

By the way, Nasco also has catalogs for art and other topics. I have purchased materials from both the science and art catalogs for my niece.

phiferan
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Postby phiferan » Fri Aug 17, 2007 8:55 pm

Thanks again,
You know, I get all my science kits from www.sciencekit.com (Boreal Laboratories); it is a great place for pre-packaged science lab kits, with supplies, instructions and answer keys, and at reasonable prices. You do have to supply the more pricy lab items such as microscopes and graduated cylinders (but you can buy those from this site as well), and you have to buy a few easy to purchase perishable items for experiments, such as grape juice, cabbage, etc. God Bless.

Ginia
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Postby Ginia » Mon Oct 22, 2007 6:44 pm

I also use HomeScienceTools.com to get lab kits to go with my textbook.
It's a great site that offers just what you need to go with the textbook you have.

Another new source, just this August:
Dr. Shorman of DiveintoMath.com also offers science lectures on CD, and this August he has updated his science CDs to include videos of the labs.
We are using his CD for Biology and it is a God-send! Tx, Dr. Shorman.
Ginia - Author of the online program: Preparing Your Student to Win College Scholarships, a blueprint for parents.

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knobren
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fermentation/cellular respiration labs

Postby knobren » Mon Oct 29, 2007 9:14 am

I recently had a student who needed to make up a lab he missed. I found some useful sites for him to do a combination of an online lab and home experiment on alcoholic fermentation and cellular respiration.

1. Online lab exercise about cellular respiration. The quiz at the end is also good practice for interpreting graphs.

http://www.phschool.com/science/biology ... intro.html

I had him turn in the quiz and a sort of methods section explaining the procedures used in the simulation and what he learned from the experiment. This was mostly to make sure that he had done the exercise and had gotten something out of it. If you did it, you might do something like that for a portfolio, I suppose.

We actually use similar methods and equipment in our normal lab and one of the questions we ask that you might also use is:
a) Give two reasons why we know that germinating pea seeds aren't performing photosynthesis. (Hints: What does the KOH do? Where are pea seeds normally germinating?) - The KOH absorbs carbon dioxide that would be necessary for photosynthesis. Also, pea seeds normally germinate underground where there is no light for photosynthesis; instead, they rely on the food stores the parent plant provided them.

2. The home wet lab was about how temperature affects yeast and alcoholic fermentation.

http://www.lesaffreyeastcorp.com/SoY/experiment_4.html

I had him add a third temperature...so he used ice water, warm water, and hot water. I also suggested that 20 oz bottles would probably be more readily available than 1 L bottles. I cautioned him to put the smaller-sized bottles away from anyone just in case the pressure became too great and blew the balloon off. His write up didn't mention any problems, but it is better to err on the side of safety.

I also had my student write a hypothesis about how temperature would affect the fermentation process and then to explain in his conclusions how enzymes would be affected by the three temperatures. (There wouldn't be enough energy available in the ice water for the reactions to get over their activation energy humps. The enzymes were closer to their optimal temperature in the warm water, so fermentation could proceed quickly. And at high temperatures, there might be rapid fermentation at first as the solution heats up, but when the solution got hot enough, the heat would denature the enzymes, so they couldn't work anymore, therefore leading to a decreased fermentation rate.)

-knobren

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Postby StellarStory » Mon Oct 29, 2007 1:35 pm

Thanks for sharing these!

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knobren
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Postby knobren » Wed Nov 28, 2007 10:45 am

http://chemistry.about.com/od/homeexper ... t_Home.htm

These are cool and most are inexpensive.

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knobren
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snow globe science

Postby knobren » Wed Nov 28, 2007 11:13 am

http://misterguch.brinkster.net/snowglobelab.pdf

This website shows how you can can turn making a snow globe into a science experiment (and doesn't use glitter or egg shells).

(cross post from home ec. forum)

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Chaves
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generating electricity with a car fan

Postby Chaves » Thu Jun 13, 2013 8:56 am

I don't homeschool, but I taught environmental science in a private school with small classes. Since the lab manuals for environmental science available to me were pretty lame, I developed my own labs. :idea:

I joined this forum because many of my activities work best with small classes or one-on-one. Most of the items I use are inexpensive and easily available. Last week I made my very first video:

http://vimeo.com/67683088

There are many ways you can elaborate on this activity, but I wanted to keep it short. I welcome questions and comments. More videos will be coming...
Antonio Chaves

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Chaves
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new video

Postby Chaves » Wed Jul 03, 2013 9:09 am

I just made another video on electricity. The two motors and propeller cost less than $7 so this is a pretty good deal:

http://vimeo.com/69594382
Antonio Chaves

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Chaves
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soil texture

Postby Chaves » Wed Jul 10, 2013 3:52 pm

I just produced a video for a lab on soils. Note that all materials are commonly available in most homes:

https://vimeo.com/channels/entropyrider/70065208
Antonio Chaves


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