Question and answer
9. Which of the following is a physical change? (1 point) A sawing a piece of wood in half B burning a piece of wood C rust forming on an iron fence D a copper roof changing color from red to green
The following is a physical change: sawing a piece of wood in half.
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Asked 1/28/2013 12:37:29 PM
Updated 11/24/2015 11:38:19 AM
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The following is a physical change: sawing a piece of wood in half.
Added 11/24/2015 11:38:19 AM
This answer has been confirmed as correct and helpful.
Confirmed by yumdrea [11/25/2015 11:56:26 AM]
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6. Water is a compound because it (1 point) A can be broken down into simpler substances. B always has two hydrogen atoms for each oxygen atom. C is made of water atoms joined together. D both a and b
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Updated 10/11/2014 12:38:31 PM
1 Answer/Comment
Both a and b. Water is a compound because it can be broken down into simpler substances, and always has two hydrogen atoms for each oxygen atom.

Added 10/11/2014 12:38:31 PM
This answer has been confirmed as correct and helpful.
9. Which of the following is a physical change? (1 point) sawing a piece of wood in half burning a piece of wood rust forming on an iron fence a copper roof changing color from red to green
Question
Not Answered
Updated 6/14/2016 4:23:40 AM
1 Answer/Comment
An example of physical change is sawing a piece of wood in half.
Added 6/14/2016 4:23:40 AM
This answer has been confirmed as correct and helpful.
Confirmed by jeifunk [6/14/2016 4:29:52 AM], Rated good by jeifunk
12. Which of the following will cause a decrease in gas pressure in a closed container? (1 point) lowering the temperature reducing the volume adding more gas both a and b
Question
Updated 1/17/2015 10:09:22 AM
1 Answer/Comment
Lowering the temperature will cause a decrease in gas pressure in a closed container.

Added 1/17/2015 10:09:22 AM
This answer has been confirmed as correct and helpful.
Confirmed by sujaysen [1/17/2015 1:55:26 PM]
12. Which of the following will cause a decrease in gas pressure in a closed container? (1 point) A lowering the temperature B reducing the volume C adding more gas D both a and b
Question
Not Answered
Updated 12/13/2014 7:14:53 PM
1 Answer/Comment
Lowering the temperature will cause a decrease in gas pressure in a closed container.


Added 12/13/2014 7:14:53 PM
This answer has been confirmed as correct and helpful.
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