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