Professional Experience

Does air have mass?

An interesting science experiment done with yr4/5 whilst on prac.



Objective: to see whether air has mass.
Materials: two equally inflated balloons, a straw, string and scissors.
Procedure:
1. Make a mobile using the balloons, the string and the straw. Make sure the balloons are equally balanced.
2. Let the air out of one balloon by making a small cut near the knot.
Result: the mobile became unbalanced, with the inflated balloon hanging lower.
Conclusion: Air has mass.