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