Two students go to play basketball. They notice the ball is flat (it won't bounce). They decide to pump it up with air. After it is pumped with air, will the ball have more, less, or the same amount of mass as before air was added? Choose the correct statement.

A. The ball has more mass after being pumped with air.
B. The ball has less mass after being pumped with air.
C. The ball has the same amount of mass after being pumped with air.
D. Cannot determine unless we measure the mass.

Justify your answer to #2:

D.

Explanation:

We only know the mass of the ball before it was flat. That saying the children could have overpumped it or put it less than they had in the first place. We will never know the answer until we measure the mass of the ball.

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hope this you! : )

(i popped my answer into google translate so it may be a bit wonky)