1. The packages are puffed up on the ground

due to overinflation with helium. This type

of packaging provides extra buoyancy for aircrafts.

2. The air in the jet is approximately ten

times hotter than on the ground, thus increasing the temperature of the gas in the

packages.

3. The peanuts have greater velocities at

high altitudes, thus causing the peanuts to

exert more force on the packaging.

4. They were packaged at a higher pressure

on the ground, thus causing the gas inside the

packages to expand in the sky where the jet is

at a lower pressure.

5. The jet is over-pressurized at high altitudes, thus causing the gas inside the packages to expand.