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Re: Anybody have examples of physical change/chemical change??

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CoinBank is not online. CoinBank
Joined: 18 Nov 2011
Total Posts: 50098
21 Feb 2014 10:47 AM
For my homework... heh
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tahu157 is not online. tahu157
Joined: 16 Nov 2008
Total Posts: 15045
21 Feb 2014 10:48 AM
Physical: Cutting an Apple

Chemical: Burning Wood
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BlackCrisisDrone is not online. BlackCrisisDrone
Joined: 17 Jul 2010
Total Posts: 31673
21 Feb 2014 10:48 AM
Physical: Wooden board getting cut by a saw

Chemical: Statue getting eaten away by acid rain
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CoinBank is not online. CoinBank
Joined: 18 Nov 2011
Total Posts: 50098
21 Feb 2014 10:49 AM
Alright great, i'll use that


isn't mowing grass a physical change?
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BlackCrisisDrone is not online. BlackCrisisDrone
Joined: 17 Jul 2010
Total Posts: 31673
21 Feb 2014 10:50 AM
Yeah
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tahu157 is not online. tahu157
Joined: 16 Nov 2008
Total Posts: 15045
21 Feb 2014 10:50 AM
Yes.

As a rule of thumb, Physical changes can be reversed while Chemical changes cannot.


In theory, if you broke a glass, you could glue all the pieces back together, but if you burn a piece of paper, you cannot take the ash and turn it back into a piece of paper.
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CoinBank is not online. CoinBank
Joined: 18 Nov 2011
Total Posts: 50098
21 Feb 2014 10:51 AM
Alright great, thanks guys!


i appreciate it
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roblogonzo is not online. roblogonzo
Joined: 04 Mar 2010
Total Posts: 9519
21 Feb 2014 10:56 AM
Cool I do chemistry too!
Err I don't know good examples of it..
Lemme try


Physical: Rubbing a plastic rod
Chemical: It produces static electricity
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AX360 is not online. AX360
Joined: 11 Mar 2009
Total Posts: 13603
21 Feb 2014 10:57 AM
OP are you in middle school or something?
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orlorx2222 is not online. orlorx2222
Joined: 21 Jul 2011
Total Posts: 8537
21 Feb 2014 10:58 AM
physical - cutting off your arm (it's still an arm if you cut it off)
chemical - rusting of metal
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