wiki Word: Chemical Change

Definition: A change in a substance that changes its chemical properties giving it a new identity.

When a substance undergoes a chemical change its chemical properties are re-aranged. This gives it a  completely new indentity that may or may not be similar to its last identity.

A change in color, heat, sound, and light usually indicate a chemical change.

Some examples of chemical changes are:

A nail rusting

 A bomb exploding

Oxygen and hydrogen atoms bonding

Chemical changes are very important to understand in science. They happen all the time in every day life. Chemical changes explain why different subsatances act the way they do. For example, when oxygen and hydrogen atoms bond to form water, they undergo a chemical change. Even though oxygen and hydrogen have very different qualities than water, that's what they make when they undergo a chemical change. We use chemical changes to make things we use, such as plastic. Plastic is made out of carbon, oxygen and hydrogen. Plastic does not exist naturally as the plastic we know today (like in water bottles). It was made that way by chemical changes that scientists discovered.

 "Plastic." Wikipedia, The Free Encyclopedia. 8 Apr 2008, 19:38 UTC. Wikimedia Foundation, Inc. 8 Apr 2008 <http://en.wikipedia.org/w/index.php?title=Plastic&oldid=204282568>.

"Chemical Reactions." 08 Apr 2008 <http://www.ric.edu/faculty/ptiskus/reactions/Index.htm>.

 "A Closer Look: Chemical Vs. Physical Change." learner. 2008. Annenberg Media. 9 Apr 2008 <http://www.learner.org/channel/courses/essential/physicalsci/session4/closer1.html>.

Hodgetts, Andy . "The NEW Tutorial Portal." CG Empire. 20 Oct 2006. 9 Apr 2008 <http://cgempire.com/forum/2d-tutorials-63/tutorial-photoshop-how-make-explosion-effect-940.html>.

"Fried Egg." Filter Forge. 9 Apr 2008 <http://www.filterforge.com/filters/3182.html>.