Hot Air Balloons Comprehension

Front

What is the purpose of the author when writing about hot air balloons?

Back

to inform

Front

What is the envelope in a hot air balloon?

Back

the balloon itself

Front

Who were the first hot air balloon pilots?

Back

A sheep, a rooster, and a duck.

Front

Why do people start the fire in a hot air balloon?

Back

Hot air helps the balloon rise.

Front

Which is heavier: cold air or hot air?

Back

Cold air is heavier than hot air.

Front

What is a hot air balloon made of?

Back

A large fabric envelope that holds hot air.

Front

What happens to hot air when it rises?

Back

It becomes less dense than the cooler air around it.

Front

What is the basket in a hot air balloon?

Back

The part where passengers and the pilot sit.

Front

What is the main source of heat for a hot air balloon?

Back

A burner that uses propane gas.

Front

What do hot air balloons need to fly?

Back

Hot air to lift them off the ground.