Which best explains why a wood-burning fireplace represents an open system?
Abecause they are not all made of brick
Bbecause a fire requires oxygen from the atmosphere to burn
Cbecause they can be used for cooking
Dbecause the ashes have to be swept away
Abecause they are not all made of brick
Bbecause a fire requires oxygen from the atmosphere to burn
Cbecause they can be used for cooking
Dbecause the ashes have to be swept away