U4L4- Hot Air Balloons

Front

What does the word 'impossible' mean?

Back

unable to be done

Front

What does the word 'launch' mean?

Back

to start something in motion

Front

How are cold air and hot air different besides temperature?

Back

Hot air is lighter than cold air.

Front

Why did people stop traveling by hot air balloon after the Wright Brothers invented the airplane?

Back

Traveling by airplane took less time.

Front

Which of the following is NOT an example of motion: biking, running, sitting, walking?

Back

sitting

Front

What is a hot air balloon?

Back

A balloon that rises in the air when heated air inside it becomes lighter than the cooler air outside.

Front

What causes a hot air balloon to rise?

Back

The hot air inside the balloon is lighter than the cooler air outside.

Front

What is the main principle behind flight?

Back

The principle of buoyancy, where lighter objects rise in heavier fluids.

Front

What is buoyancy?

Back

The ability of an object to float in a fluid.

Front

What is the role of the burner in a hot air balloon?

Back

To heat the air inside the balloon.