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Title: Investigation about Chemical and Physical Changes
Member rating: No Rating | Words: | Submitted: Fri Mar 04 2005
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Title: Investigation about Chemical and Physical Changes Date: 2/16/2005 Prepared for: Ms. E. McDonald Stanley Ho, Wilton SCN1D Problem Why I am conducting this experiment? In order to learn how to recognize chemical and physical changes, I have to carry out this experiment to see different chemical and physical changes of different substance. How can we recognize physical changes and chemical changes? A chemical change involves a creation of a new substance, but a physical change doesn't involve any creation of any substance. For example, if a piece of chalk drops on the floor and separates into a few small pieces, it's a physical change, because only the shape of the chalk changed, but no new substance is involved, but if a piece of sodium drops into water, gas comes out, and causes a "pop" sound, that is a chemical change because gas has been formed when sodium dropped in the water. Hypothesis Hypothesis for the experiment: After...
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