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What makes hot air balloons float?
Contributed by: Leonard
  • 1. How does hot air cause a balloon to rise?
A) It is less dense than cooler air.
B) It has more pressure.
C) It is heavier than cool air.
D) It expands in size.
  • 2. What happens to the air inside the balloon when it is heated?
A) It becomes heavier.
B) It contracts.
C) It escapes.
D) It expands.
  • 3. Which part of the balloon holds the hot air?
A) The flame.
B) The envelope.
C) The burner.
D) The basket.
  • 4. What is the typical flight duration of a hot air balloon?
A) 30 minutes.
B) 1 to 2 hours.
C) All day.
D) 5 to 10 hours.
  • 5. What is the purpose of the vent on top of the hot air balloon?
A) To let in cool air.
B) To release hot air.
C) To stabilize the balloon.
D) To increase lift.
  • 6. Which condition is ideal for hot air ballooning?
A) Windy and cloudy weather.
B) Calm and clear weather.
C) Rainy conditions.
D) High humidity.
  • 7. How is the altitude of a hot air balloon controlled?
A) By adding more gas.
B) By changing the balloon color.
C) By changing the weight of the basket.
D) By adjusting the temperature of the air.
  • 8. At what height do most hot air balloons typically fly?
A) Between 1,000 and 3,000 feet.
B) At sea level.
C) Under 500 feet.
D) Above 10,000 feet.
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