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How do Hot Air Balloons Work:Example of Warm Air Rises Up Video Lecture | Class 7 Oxford Science: Chapter Notes, Worksheets & Tests

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FAQs on How do Hot Air Balloons Work:Example of Warm Air Rises Up Video Lecture - Class 7 Oxford Science: Chapter Notes, Worksheets & Tests

1. How does a hot air balloon work?
Ans. A hot air balloon works based on the principle that warm air rises. The balloon is filled with hot air, which makes it lighter than the surrounding air. As a result, the balloon lifts off the ground and floats in the air.
2. What is the source of the hot air in a hot air balloon?
Ans. The hot air in a hot air balloon is generated by burning propane gas. Propane burners are used to heat the air inside the balloon's envelope, creating a temperature difference that allows the balloon to ascend.
3. How does the temperature difference affect the hot air balloon's flight?
Ans. The temperature difference plays a crucial role in the flight of a hot air balloon. By heating the air inside the balloon, the temperature difference between the inside and outside air causes the balloon to become buoyant. The warmer air inside the balloon is less dense, making it lighter and causing the balloon to rise.
4. How is the altitude controlled in a hot air balloon?
Ans. The altitude of a hot air balloon can be controlled by adjusting the temperature of the air inside the envelope. To ascend, the pilot increases the temperature by firing the burner, while to descend, the pilot allows the air inside to cool down naturally or by venting some of the hot air.
5. Is it safe to fly in a hot air balloon?
Ans. Hot air ballooning is considered to be a relatively safe activity when proper safety measures are followed. Pilots undergo rigorous training and must adhere to strict regulations. Balloons are regularly inspected, and weather conditions are carefully monitored before every flight to ensure passenger safety. However, like any other form of aviation, there are inherent risks involved, and it is essential to choose a reputable operator and follow all safety instructions.
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