What is a chemical change?

Answer:

Chemical Changes

As opposed to a physical change, chemical changes are present when the substance undergoes a chemical reaction and produces a new substance. A chemical change is a chemical reaction that will always take place for there to be a chemical change. Signs that a reaction is taking place: Formation of gases (bubbles), Color change, production of heat or light, and the formation of a solid.

• a change in composition and characteristics of matter.
• new substance maybe formed.
• original substance and form may be lost.
• new color and shape
  

 

Examples

• Fermentation
• Photosynthesis
• Rusting nail
• Spoiling milk
• Digesting food

This answer is closed to changes. This is done in rare cases when questions are being vandalized or answers have become debates. E-mail reopen @ answers.com (no spaces) if you would like it to be reopened.