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Water Use Data http://water.usgs.gov/watuse/spread95.html http://water.usgs.gov/watuse/spread95/dictionary95.txt Online company manual of chemistry http://www.chemcompass.com |
Polymers MACROGALLERIA |
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Calculator for determining lbs of CO2 produced by electric utilitieshttp://db.rtk.net/data/egrid.html |
http://lahs.losalamos.k12.nm.us/~jeffryel/Courses/Chem/chem.htm |
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26. October 12, 1999: The Day of Six Billion "6 Billionth Earthling Born Today" The State of World Population 1999 |
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| Virtual tour of nuclear power plants |
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The USDA has an easy-to-use database of nutritional info http://www.nal.usda.gov/fnic/cgi-bin/nut_search.pl
For fast foods from the biggest chains, some data can be found at http://www.olen.com/food/. For other outlets, many of them have online data. Try typing the company's name followed by .com
There is a new online diet analyzer at |
We have been talking about catalysts. We have also been talking about what it means for a compound to be aqueous. We did a lab Zn + I2 where water functioned as a catalyst and the kids asked to see other examples. So I showed them the reaction between aqueous solutions of Pb(NO3)2 and KI. Distinctive yellow product. I then mixed small amounts of each solid reactant (both white as solids). When mixed we could see a hint of the yellow appear as I stirred the mixture. Enough to realize the reaction was happening - slowly. The addition of water to the container produced the characteristic yellow suspension and was a visual way to show that the slow reaction was speeded up. |
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Chromatography butterflies Buy Melita-type coffee filters and cut off the two edges slightly, so when you open it, it looks like a butter-fly with the body in the middle.Use a variety of water-soluble magic markers. "Name" their butterfly and then decorate it. Suggest a symmetrical pattern. Carefully place folded butterfly in about 1 cm of water in a large beaker ( 400-600mL) One per beaker. Allow the butterflies to develop only until the first dye gets to the top. Unfold, and allow to dry on paper towels. I usually have a student teacher come in and pick the "winners" -- 2 or 3 per class, and reward with candy. we display them on a bulletin board after they are dry. You can also buy pipecleaners to make antennae |
Paper marbling with oils as an easy, fun, applicable, and artistic first day back activity. In a nutshell, you dilute artists oil paints with a suitable, low odor solvent such as turpenoid, etc. Place an inch or so of water in aluminum pans slightly larger than the paper you will use. Drop the diluted paints onto the surface with Beral pipets--careful, not too much! Roll a piece of copy paper (cheap, free from supply room) onto the oil film and lift back off. Let the oil dry on the paper. If the correct amount of oil paint was on the surface, it will be almost dry to the touch within minutes. Too many globs of oil paint and it will take days to dry. After the oils are thoroughly dry, the paper can be flattened by carefully ironing it on a flat surface with a protective piece of paper over it. The decorated paper can be used as a notecard when folded, cut out a design and paste onto card stock, use as a abstract picture, etc. There is also a procedure for using acrylics top marble paper. You can carefully control the colors and desins with acrylics but they take more set up and are slower and messier. |
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Blizzard in a Bottle and as the name implies, the kids make a snowglobe using benzoic acid, baby food jars and little xmas erasers from oriental trading company, to make a snow globe It is an easy lab and you could use it to show supersaturated soln. |
Click on Town News and East Hampton which is where Lake Pocotopaug is.A listing of local news articles of which several from last couple of weeks were on the fish kill. |
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Physical Composition of new US Golden Dollar coin: The beautiful new coin features distinguishing traits including: a golden color, extra-wide border, smooth edge like the nickel's, and specially designed alloy. Specifically, the Golden Dollar is: 8.1 grams in weight, 2 mm thick, and 26.5 mm in diameter. The coin's physical makeup is a three-layer composite construction - pure copper sandwiched between and metallurgically bonded to outer layers of manganese brass. This alloy is a golden-colored material composed of: 77% copper 12% zinc 7% manganese 4% nickel. Including the copper core, the Golden Dollar's overall composition is: 88.5% copper 6.0% zinc 3.5% manganese 2% nickel |
This is a simulation of the distillation of crude oil in the petroleum unit. Procedure: Add cherry coke to distilling flask and boiling chip or glass bead; assemble apparatus for distilling; heat cherry coke gently, especially at beginning; detect odor of the ester that gives cherry coke its special smell; bubble some of the gas given off into limewater as test for carbon dioxide; note the clear fraction(liquid water) and collect in flask and check its density; stop distillation at this point so as not to char sugars remaining in flask. The sweet smelling ester and carbon dioxide are similar to the more volatile fractions which come off in the distillation of crude oil. The water fraction is a good contrast to the dark liquid left in the flask and points up distillation as means of separating components with different boiling points in a mixture. This lab is simple but gives students a known mixture to work with in the lab. |