Question

when a balloon does not pop during the skewer trick, what does this demonstrate?
that balloons do not contain much air
tire gases escape slowly through rubber
the strength and flexibility of polymers
that balloons are impossible to pop
other:
what physical property of the balloon allows it to stretch when the skewer passes through?
a) elasticity of the rubber molecules
low air pressure inside
the sharpness of the skewer

Explanation:

For the first question, balloons are made of polymers and their ability to not pop when a skewer is inserted demonstrates the strength and flexibility of polymers. For the second question, the elasticity of rubber molecules in the balloon allows it to stretch when the skewer passes through.

Answer:

1. C. The strength and flexibility of polymers
2. a) Elasticity of the rubber molecules