How Do Hot Air Balloons Work?

Air is made of

• Energy

• Matter

• Mostly oxygen

When the molecules of air are heated they:

• Move faster

• Move slower

• At the same speed

When the molecules of air are heated:

• They come closer together

• They always stay the same distance apart

• The move further away from each other

When the air is heated inside the balloon it becomes:

• Less dense

• More dense

• a solid

Hot air...

• sinks

• rises

• becomes more dense