Experiment with the powerful properties of air as you squish marshmallows with air pressure
all day long. Your students will be amazed that a huge marshmallow can end up looking like an
after dinner mint! Campouts with toasted globs of spun sugar will never be the same.  So lets
do the marshmellow masher experiment.

Materials
473 mL (16 oz.) bottle
Pressurizing pump (Fizz-Keeper®)
Large plastic test tube
Activity guide

Watch Video: Marshmellow Masher Experiment




















The Science Behind Marshmellow Masher Experiment
Put some marshmallows in your bottle and attach the pressurizing pump. Then pump air into
the bottle. As the pressure inside the bottle increases, there will be more pressure outside the
marshmallows than inside. The marshmallows begin to shrink and look wrinkled because the
air molecules inside them are pushed closer together by the difference in pressure. When you
take the top off the bottle, they return to full size! Use the large plastic test tube to experiment
with pumping smaller quantities of marshmallows.
What does it teach?

Learn about the properties of air and discover some facts about air pressure. Experiment with
changing the balance of pressure to achieve a certain result. The best thing about this
experiment is that when you're finished, you can eat it! So grab your friends and do the
marshmellow masher experiment!
Marshmellow Masher www.weirdsciencekids.com
Marshmellow Masher www.weirdsciencekids.com
Marshmellow Masher www.weirdsciencekids.com
Marshmellow Masher www.weirdsciencekids.com
Marshmellow Masher www.weirdsciencekids.com
Marshmellow Masher www.weirdsciencekids.com
Marshmellow Masher www.weirdsciencekids.com
Marshmellow Masher www.weirdsciencekids.com
Marshmellow Masher www.weirdsciencekids.com
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