CoinBank
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| Joined: 18 Nov 2011 |
| Total Posts: 50098 |
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tahu157
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| Joined: 16 Nov 2008 |
| Total Posts: 15045 |
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| 21 Feb 2014 10:48 AM |
Physical: Cutting an Apple
Chemical: Burning Wood |
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| 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
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| Joined: 18 Nov 2011 |
| Total Posts: 50098 |
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| 21 Feb 2014 10:49 AM |
Alright great, i'll use that
isn't mowing grass a physical change? |
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tahu157
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| Joined: 16 Nov 2008 |
| Total Posts: 15045 |
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| 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
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| Joined: 18 Nov 2011 |
| Total Posts: 50098 |
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| 21 Feb 2014 10:51 AM |
Alright great, thanks guys!
i appreciate it |
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| 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
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| Joined: 11 Mar 2009 |
| Total Posts: 13603 |
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| 21 Feb 2014 10:57 AM |
| OP are you in middle school or something? |
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| 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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