Captain Carbonate’s Fizzy Float Lab

A hands-on snack science investigation for foam towers, mixtures, carbonation, and taste testing!

Turn root beer floats into a full science experience with Captain Carbonate’s Fizzy Float Lab — a playful, printable lesson pack where students explore carbonation, carbon dioxide, homogeneous and heterogeneous mixtures, foam formation, scientific method, variables, measurement, and evidence-based conclusions.

Students will test three fizzy float combinations:

Station 1: Mix-Your-Own Soda Float

Syrup + sparkling water + chocolate chip ice cream

Station 2: Classic Root Beer Float

Regular root beer + vanilla ice cream

Station 3: Rainbow Sherbet Fizz Float

Lemon-lime soda + rainbow sherbet

The big question:

Which fizzy float makes the tallest foam tower — and why?

Students will predict, observe, mark cup lines, measure foam rise, compare station results, taste test, and use their evidence to explain what happened. This is a high-engagement science lesson that feels like a party but still builds real scientific thinking.

Skills Covered

Students practice:

• making observations
• forming a hypothesis
• identifying variables and constants
• measuring foam rise
• comparing data
• understanding carbonation and carbon dioxide
• distinguishing homogeneous and heterogeneous mixtures
• using claim, evidence, and reasoning
• connecting science to food history and real-world examples

Designed For

This pack works beautifully for:

• homeschool groups
• co-ops
• classrooms
• science clubs
• outdoor learning days
• park meetups
• STEM enrichment
• mixed-age family learning
• upper elementary and middle school science

The core “Level 1” pages are great for younger or mixed-age students, while the “Level Up” pages add deeper scientific method, variables, data analysis, and CER writing for older learners.

Why Teachers and Parents Love It

This lesson is structured enough to run smoothly but flexible enough for real kids, real groups, and real messes. It includes visual posters, station labels, helper cards, allergy reminders, and quick-reference pages so adults can guide the activity without needing to memorize a script.

It’s playful, colorful, movement-friendly, and designed to help students feel like scientists while exploring something familiar and fun.

Materials Needed

You’ll need simple grocery-store supplies like:

• 18 oz clear cups
• Sharpies
• rulers or measuring tape
• measuring cups
• soda syrup
• sparkling water
• regular root beer
• lemon-lime soda
• chocolate chip ice cream
• vanilla ice cream
• rainbow sherbet
• spoons or scoops
• paper towels or wipes

Perfect For

Use this as a stand-alone science lesson, a summer STEM activity, a co-op lab, a chemistry club session, or a fun end-of-unit investigation.

Captain Carbonate is ready to help your students observe, question, experiment, measure, and use evidence — one fizzy float at a time!