Take a real on line Chemistry test.: Chem Practice Test

The Science of Chemistry -- This series of links seeks to firmly establish the relevance of chemistry in our lives through a study of a common medicine (aspirin),

What was the origional substance from that was used to make aspirin?	What is the chemical formula for aspirin?
Does the photo below show all the atoms?	Which color represents carbon, hydrogen and oxygen?
Do companies still make money selling it?	Who discovered it and did he get the patent?
Who discovered aspirin?	Who makes money on it?
What are some new uses for aspirin?	Why is aspirin so popular?

Internet Research:

a. The chemistry of aspirin b. 3-D ball-and-stick model of aspirin molecule c. America's 80 Billion Aspirin Habit d. Aspirin: Molecule of the Month e. History of aspirin (from Bayer site) f. Synthesis and chemistry of aspirin g. The European Aspirin Foundation h. New uses for aspirin (by Bayer) [and another] i. General aspirin site (by Bayer) j. Biographic information on Felix Hoffmann

B. Links to websites of major chemical producers

C.Federal agencies involved with chemical issues

I. CDC's Agency for Toxic Substances and Disease Registry II. Consumer Product Safety Commission III. Food and Drug Administration IV. Environmental Protection Agency V. Occupational Safety and Health Administration VI. Department of Agriculture

D.Material safety

I. General chemical safety information from Oxford University

II. A collection of Material Safety Data Sheets (MSDS)

E.The methods of science

I. A class activity illustrating scientific methods

II.An iconoclastic essay on "The Scientific Method"

III.Essay: "Think Like a Scientist"

IV.A comparison of the Socratic and scientific methods

V.Some thoughts on teaching scientific methods

VI.Some consumer topics that could be used to illustrate scientific methods

VII.An exploration of "The Scientific Method"

Recipes From all over the web: Food Link

Cool Greenhouse Effect site with animation.

Who doesn't like Juressic Park?

The Best Search Engine looks over 200,000,000 web pages.

Answers to some common questions on radio and TV.

Q Who invented radio?

Guglielmo Marconi of Bologna , Italy was the first person to prove that radio waves could be sent long distances. He sent Morse code signals from Newfoundland to England in 1901.

Q Why do FM radio stations have limite d broadcast range?

TV, FM radio, and cell phones are high frequency radio waves that don't bounce off the Earth's ionosphere, but travel off into space. The line-of-sight distance depends on the terrain and antenna height.

Q How do submerged submarines communicate?

Subs communicate on many different frequencies. They may use extremely low frequencies at low data rates while deeply submerged by towing a very long wire out the rear of the ship. This makes them difficult to detect. Closer to the surface they can transmit at high data rates with surface ships and satellites with small antennas that break the surface.

Q. When was the first commercial communications satellite used?

In 1962 the Telstar 1 (paid for by ATT)was launched into low Earth orbit. It was the first true repeater satellite, able to relay not only data and voice, but TV as well. The first broadcast was an American flag flapping in the wind.

Q How does a fax machine work?

The fax (facsimile) machine sends graphics and text information through telephone lines. The sending machine uses a scanner to convert the black and white image into electrical signals that are sent through the telephone lines t a receiving machine. The receiving unit converts the transmission back to an image and prints it.

The fax was invented in 1842 by Alexander Bain of Scotland and first used commercially in 1924 to send wire photos for newspapers.

Q How is a byte defined?

A byte, a common unit of computer storage, holds a single character, such as the letter "A", or a number "3", or a symbol (%) or a space. It is the equivalent to eight "data bits". Although eight bits per bit e is the most common, computer makers are free to define a different number of bits as a byte.

Q What is a pixel?

A pixel (from the words pix, for picture, and element) is the smallest element on a video display screen. A screen contains thousands of pixels, each of which can be made up of one or more dots or a cluster of dots (on color monitors). On color screens, three dot colors are included in each pixel - red, green, and blue. Black is created by all three colors off and white by all three colors on.

Modern color displays can use a million pixels, with each color dot using four bytes of memory and this would require many megabytes just to display the image.

Q Chemistry: Which chemical element is the most abundant in the universe?

Hydrogen (H. element 1) makes up about 75 percent of the known mass of the universe. It is estimated that more than 90 percent of all atoms in the universe are hydrogen atoms. Most of the rest are helium (He, element 2) atoms.

Q Which chemical elements are the most abundant on the Earth?

Oxygen (O, element 8) is the most abundant element in the Earth's crust, waters, and atmosphere. silicon (Si, element 14) is the second most abundant element. Silicon dioxide makes up about 87 percent of the earth's crust.

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