4. Fizzy Lifting Drinks

STEM water activitiesSoda isn’t the healthiest drink choice, but it does make for a great STEM water activity!

Believe it or not, different kinds of soda float while others sink. Bring in a variety of brands and types of soda — all the same size and volume — and submerge them in a water basin, having students track which go down and which stay afloat.

Have students brainstorm why most sodas sink, yet diet options stay at the top of the water. Then discuss density and how that affects buoyancy. There’s no doubt your students will be running home to show their family members this neat trick…and explain why it happens!