This site has lots of information about minerals, and lots of pictures of minerals and gemstones.
http://www.khulsey.com/jewelry/mineral_classification.html
Monday, March 17, 2008
Lots of Rocks
This site has a simple yet comprehensive catalog of the basic properties of rocks and minerals
http://www.gc.maricopa.edu/earthsci/imagearchive/interest.htm
http://www.gc.maricopa.edu/earthsci/imagearchive/interest.htm
Wednesday, March 5, 2008
How To Measure the Earth With Only a Stick
Check out how Erastosthenes did it 2000 years age
http://www.3villagecsd.k12.ny.us/wmhs/Departments/Math/OBrien/eros2.html
All you need is a little geometry, and, by the way, ancient scientists DID know that the earth was round. There are several simple ways to demonstrate this. One way is to think of a ship sailing away from shore. What part of the ship vanishes first?
What did Erastosthenes know, what assumptions did he have to make, and what did he have to find out to do this amazing work?
http://www.3villagecsd.k12.ny.us/wmhs/Departments/Math/OBrien/eros2.html
All you need is a little geometry, and, by the way, ancient scientists DID know that the earth was round. There are several simple ways to demonstrate this. One way is to think of a ship sailing away from shore. What part of the ship vanishes first?
What did Erastosthenes know, what assumptions did he have to make, and what did he have to find out to do this amazing work?
Sing Along With the Elements
I bet that none of you are old enough (or hip enough) to remember Tom Lehrer, but you might still enjoy his take on the periodic table
http://www.privatehand.com/flash/elements.html
http://www.privatehand.com/flash/elements.html
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