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