Hot air balloons are amazing. They can defy gravity and look cool doing it.
but how do hot air balloons stay up in the air and float along the sky?
This is how.
Hot air balloons use heat to rise off the ground. Hot air balloons float
because the air trapped inside the balloon is heated by a flame or burner,
making the air outside of the balloon more dense. Heat rises so the hot air
inside the balloon lifts the balloon up because the air outside is colder.
The parts of a hot air balloon are:
Envelope
The burner
The basket or gondola
The basket is where the passengers ride,baskets protect the passengers
and are lightweight and flexible. The burner is over the passengers heads
and makes a huge flame to heat the air inside the balloon.the envelope is the
colorful fabric(balloon) bag that holds the hot air.
