Tuesday, March 21, 2006
Endothermic Reaction Examples
Here's a set of examples of endothermic reactions for homework or demonstrations.
Tuesday, March 14, 2006
Burning Money Demonstration
Set money on fire and watch it burn out without damaging the bill. This is a nice magic trick, based on everyday chemistry.
Monday, March 13, 2006
Secret Formula?
Here's a formula or equation submitted by a reader. He says he's been carrying it around in his wallet for twenty years and that at least one man's death was linked to the content. Does the equation still have significance today? You be the judge.
Wednesday, March 1, 2006
Water into Wine Demonstration
This chemistry demonstration uses readily-available chemicals to cause water to appear to change into wine or blood. It's a nice example of the acid-base color change of a pH indicator.
Tuesday, February 21, 2006
Atoms & Atomic Theory - Study Guide
Get essential facts about atoms and the basics of atomic theory, work problems to test your skills, then take a quiz to make sure you understand the concepts.
Tuesday, February 14, 2006
Make Disappearing Ink
Learn how to make blue or red ink that will disappear after exposure to air. Tips for restoring the color and an explanation of the acid-base chemistry of the reaction are also included.
Thursday, February 9, 2006
Science Fair Project Quiz
Get information about what makes a good science fair project, then test your understanding with this multiple choice quiz.
Tuesday, January 31, 2006
Mass - Energy Relations in Nuclear Reactions
Learn how to calculate the energy change in a nuclear reaction, such as radioactive decay.
Tuesday, January 24, 2006
Chemistry Basics
Here are the answers common basic questions about chemistry, such as what it is, why people study it, and what fields use it.
Wednesday, January 18, 2006
Smoke Bomb Instructions
You can easily make a smoke bomb using inexpensive materials to produce safe smoke.
Tuesday, January 10, 2006
Make Colored Bubbles
Make brightly colored pink and blue soap bubbles that won't stain clothing or surfaces.
Tuesday, January 3, 2006
What Was Project Stormfury? Can Cloud Seeding Dissipate Hurricanes?
One way scientists have tried to lessen the severity of hurricanes is by seeding the clouds with silver iodide. This research program was Project Stormfury, which ran from 1962-1983. Learn whether cloud seeding worked and why the program was discontinued.
Tuesday, December 27, 2005
Famous Chemists Hangman Game
How well do you know your history? This fun and educational hangman game draws on the names of scientists who made important contributions to the field of chemistry.
Wednesday, December 21, 2005
Liquid Nitrogen Ice Cream
Make liquid nitrogen ice cream as a cool cryogenics or phase change demonstration or for a quick and tasty treat.
Monday, December 19, 2005
Science Pictures
This is an image gallery of science photographs and images. Most of the images relate to chemistry, though there are many which apply to science in general or are specific to biology, physics, or medicine.
Monday, December 19, 2005
Science Lab Safety Signs
Science labs, particularly chemistry labs, have a lot of safety signs. This is a collection of public domain images you can use to learn what the different symbols mean or to construct signs for your own lab.
Wednesday, November 30, 2005
Christmas Tree or Floral Preservative Recipe
Is there a secret special ingredient in those little packets of floral preservative? No! It's easy and economical to make your own Christmas tree or cut flower preservative, using ingredients found at home.
Thursday, November 24, 2005
Element Mnemonic Device
Here's a handy mnemonic device to help memorize the symbols and sequence of the first nine elements in the periodic table.
Tuesday, November 22, 2005
Blue Bottle Color Change Demonstration
Learn how to perform the blue bottle chemistry demonstration, in which a blue liquid becomes clear, then returns to blue when swirled around. Instructions are also given for red -> clear -> red and green -> red -> green reactions.
Tuesday, November 15, 2005
Element Photos
You probably know what elemental carbon looks like (think diamond or graphite), but you might not know what indium or cadmium look like. Here's a collection of photographs of the elements to help you out.
Tuesday, November 8, 2005
Rate of Radioactive Decay
Work through an example chemistry problem on the rate of radioactive decay, a type of first order rate reaction.
Tuesday, November 1, 2005
Before You Buy a Chemistry Set
Educate yourself about age requirements, pricing, safety, refills, and other factors to consider when buying a chemistry kit.
Wednesday, November 2, 2005
Chemistry Scavenger Hunt
A chemistry scavenger hunt is an educational game where you find items that match a description. It's a great way to learn key concepts. Here's a list of chemistry scavenger hunt clues and items that match.
