SPLAT
SCIENCE
"Making Science Splat~tacular!"
Adam Thornton's
Marshmallows Under Pressure





















Supplies: Marshmallows, Bottle, Fizz Pump.

What happens: Fill your bottle with 2/3 of water.  Drop several marshmallows into the bottle
and connect the fizz pump to the top and tighten.  Pump your bottle up with marshmallows
and watch what happens as pressure is added to the bottle.  Do you marshmallows shrink?  
Do the marshmallows sink any?  Now unscrew the fizz pump releasing the pressure...the
marshmallows will expand!

Explanation: Boyles Law states that as you increase pressure on a gas, its volume
decreases.  Notice that the marshmallows sink yet still weigh the same...this increases the
density of the marshmallows causing them to sink slightly!  When pressure is removed they
quickly grow back to their normal shape.
SPLAT SAFETY
1) Always have an adult
present.

2) Always wear the correct
safety gear.

3) Never eat or drink
anything while performing
experiments.




DISCLAIMERS:
ScienceSplat Experiments
are safe to do when the
instructions are followed
correctly. Remember to
use common sense and
wear safety goggles.  
Adam Thornton,
ScienceSplat, and
ScienceSplat affiliates
expressly disclaim all
liability for any
occurrence including, but
not limited to, damage,
injury, or death, which
might arise as
consequences of the use
of any online
experiments, Splat Shop
items, or science book
projects. All liability is
assumed by the child's
guardian or experiment
supervisor.  Do these
experiments at your own
risk!
Splat!
Click to Soak It Up! and learn more!
<Back to experiments