MadSci Network: Chemistry

Subject: Are all physical changes reversible?

Date: Sat Sep 16 00:47:54 2000
Posted by Johanna Amerongen
Grade level: 4-6 School: Cleveland Elementary School
City: North Vancouver State/Province: BC Country: Canada
Area of science: Chemistry
ID: 969079674.Ch

I am currently teaching a grade 5/6 class about chemical and physical 
changes. Some of the books that I have been reading refer to physical 
changes as being reversible - chemical changes not. Well, I saw the 
question about "baking" on your website and it states that there is a 
physical change in baking, but I don't think that you can "reverse" a 
baked cake. Can you explain this to me?

Thank you.

Re: Are all physical changes reversible?

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