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About Me: I teach Physics, Chemistry, and Physical Science. I love challenging myself and my students to explore the world around us and think critically.
Affiliation: Royal High School
Location: Royal City, WA
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Joined: Sat Jul 31, 2010 5:23 PM
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Total Posts: 38
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IM: kabamf gmail
Recent Posts by Eric
Thu Jan 29, 2015 12:07 AM in What Was Dalton's Model?
Thanks for your input and links, Pamela. The historical development of scientific models is always of interest to me. For some reason, it is very difficult to find good information on the history of models of bonding. I hope you find my posts below of interest.

Wed Jan 28, 2015 11:57 PM in What Was Dalton's Model?
After much searching and reading, I have reached a conclusion as to what Dalton's model of atomic bonding was: he didn't have one. There is no evidence that I can find that suggests he believed atoms had hooks. If anything, it is likely that he didn't believe atoms had hooks. In a public lecture he delivered, he quoted Newton's thoughts on atoms, where Newton says the following: "The Parts of ...

Fri Nov 21, 2014 6:31 PM in What Was Dalton's Model?
I've e-mailed some people with access to lots of primary sources. They said they'll get back to me. I'm quite eager to hear about it. Dalton's five points about are well known and described in a number of text books. But what no book ever says is what mechanism Dalton proposed for atomic bonding. Did he believe in hooks, as some websites assert? Did he just gloss over the issue altogether, content...

Recent Reviews by Eric

4 Good introduction to moment of inertia
Almost everyone is familiar with inertia and that objects resist changes to motion, but I think the idea of 'moment of inertia' eludes many. This is unfortunate, because many important objects in our life spin, and you can't understand spinning motion without understanding the moment of inertia. The full story of what a moment of inertia is and how to assign one to an object is worth exploring for those who wish to go deeper. It would also be worthwhile to find some objects of differing mass to roll that result in a tie. In any case, I encourage any one who lacks insight into the nature of spinning motion to start with this article.

5 For those who wondered
This is a delightful little article that explains words that are tossed around a lot in science class, but unfortunately are not very well understood by many people. This article is great starting point for anyone who is confused about the difference between law, theory, and hypothesis.

5 At last, one for the biochemists
At first I thought this SciPack was going to be largely redundant with other SciPacks that discuss cell growth and functions, and at one level it is, because there is nothing fundamental in it that isn't addressed somewhere else. That said, this SciPack goes into much more chemical detail as to the "how's" of energy generation and consumption, giving specific details as to the chemicals and mechanisms involved, as well as the energy balance sheet (what you put into the system and what you get out). This SciPack is the place where biology meets chemistry, so if you are ever interested in knowing the mechanisms of cellular function (instead of just glossing over it and saying "that's just how it is"), this is the SciPack that will take you there. Alternatively, as a chemist, it's your chance to see chemistry played out on its most exciting stage: life.

Recent Public Collections by Eric

3 Resources
These articles focus on inquiry in the science classroom.

Inquiry Takes Time
Type: Journal Article
Grade: Elementary School

A Template for Open Inquiry
Type: Journal Article
Grade: High School