6. Into a bottle a lab tech put bacteria, sugar, oxygen, and protein. The bottle was then sealed so that it was a closed system. A closed system means nothing could get in or out. The bacteria began to multiply and increase in number. Did the bottles’ mass increase, decrease, or stay the same? In your answer, you must give reasons (2) and use the Law of Conservations of Mass and Energy. (Minimum of 4 sentences).