Physical and Chemical Changes

Physical/Chemical Properties
1) Please click on the following link to record a definition of physical property and chemical property. Also, try to figure out the difference between a physical and chemical change.
http://www.fordhamprep.com/gcurran/sho/sho/lessons/lesson15.htm

http://www.ric.edu/faculty/ptiskus/chemical/

2) Use this link to answer the following questions: http://yucky.discovery.com/noflash/body/pg000126.html
A. What starts chemical changes in food?
B. Are the following Physical or chemical changes?
a.The teeth tear off a bite of pizza.
b.The starch in the pizza crust turns to sugar.
c.Muscles squeeze the chewed pizza down your esophagus.
d.In the intestines, liquids from the kidneys and pancreas mix with leftovers from the stomach.


Finally, please watch this slide show that depicts examples of pollution in China.
http://www.nytimes.com/packages/html/world/20070826_CHINA_OVERVIEW_FEATURE/index.html