The bottle is already full of air, so it's very hard to blow more air into it. When you do blow into the bottle the air comes...

Enrichment Activity 5-11 11-14

Your hands warm the cold air inside the bottle, making it expand and force the coin off the bottle and into the air!

Enrichment Activity 5-11 11-14

The small balloon’s surface is very curved, so most of the tension in the rubber squeezes down on the air, increasing its...

Enrichment Activity 5-11 11-14

Air presses down equally on the water in the bottle and in the straw at first, but attaching the inflated balloon increases...

Enrichment Activity 5-11 11-14

The marshmallows should grow to become much larger. When you release the stopper they should collapse to their previous size.

Enrichment Activity 5-11 11-14