Answer:
Plant cells have a cell wall, as well as a cell membrane.
Explanation:
the cell wall protects the cell membrane
Answer:
The balloon will instanly freeze and "shatter" :)
Explanation:
The volume of a gas will shrink if its temperature decreases. The cold liquid nitrogen cools the air inside the balloon. As a result the molecules of air slow down causing the volume of the balloon to decrease. :)
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Cat urine. May sound weird, may get it wrong, but it's true. Your teacher'll freak out.
The answer is b physical change
Answer:
the relationship between mass and volume