What is the purpose of the parachute valve in a hot air balloon?

• To release hot air so the balloon can rise or sink

• To inflate the balloon with cold air

• To anchor the balloon to the ground

• To control the direction of the balloon

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Describe the process of how a hot air balloon rises and sinks.

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Analyzing

The ___ is the part of the hot air balloon that carries the driver and passengers.

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What are 'night glows' at hot air balloon festivals?

• Lit balloons held in place on the ground at night

• A type of race held at night

• Fireworks display during the festival

• A concert event at the festival

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Analyzing

Explain the role of burners in a hot air balloon.

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The envelope of a hot air balloon is made of ___.

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Analyzing

How do hot air balloon festivals contribute to local tourism and economy?

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