Hot Air Balloons

Who invented the first hot air balloon?

• A The Wright Brothers
• B Leonardo DaVinci
• C Sir Issac Newton
• D The Montgolfier Brothers

Besides temperature, how are cold air and hot air DIFFERENT?

• F Cold air is less dense
• G Hot air is more dense
• H Hot air is less dense
• I They are not different

How do pilots steer a hot air balloon?

• A Pilots use big wings to steer
• B Pilots move up or down to catch the wind
• c Pilots use jets to steer
• D Pilots wear wool sweaters to sterr

The hot air balloons we made worked best if:

• F They were cool inside
• G They were full of holes
• H The balloon was smaller than most
• I The balloon seams were sealed.

Which kind of day would be best for a hot air balloon ride?

• A A very hot day.
• B A cool day.
• C A windy day
• D A rainy day