Which best explains why a wood-burning fireplace does not represent a closed system?

A.
because they are not all made of brick

B.
because a fire requires oxygen from the atmosphere to burn

C.
because the ashes have to be swept away

D.
because they can be used for cooking

Question

Which best explains why a wood-burning fireplace does not represent a closed system?
	
	
 
A.
	because they are not all made of brick
	
 
B.
	because a fire requires oxygen from the atmosphere to burn
	
 
C.
	because the ashes have to be swept away
	
 
D.
	because they can be used for cooking

anonymous · Answer

All of the answers are irrelevant except for B.

anonymous · Answer

Thanks!