Purpose
Students investigate what causes elephant toothpaste to produce foam, gas, and heat, using observations and short research from several reliable sources. In teams, they safely design, test, critique, and improve a teacher-approved reaction setup that demonstrates and explains its thermal energy release. They present their final setup at a live science showcase, explain the evidence behind the reaction, and answer audience questions. Students conclude by reflecting on their growth in explaining chemical reactions and the collaboration habits that helped their group succeed.
Learning goals
Students will identify evidence of a chemical reaction by observing foam, temperature change, and oxygen gas during elephant toothpaste. They will research self-generated questions using several credible sources and explain how the reaction releases thermal energy and how foam traps the gas. Teams will design, safely test, critique, and improve a showcase station, using evidence and shared decision-making to explain their results and answer audience questions. Students will reflect on their growth in explaining chemical reactions and the collaboration, communication, problem-solving, and self-direction habits that supported their group’s success.
Products
Teams will create a research brief answering a self-generated question about why elephant toothpaste produces foam, gas, and heat, using evidence from several reliable sources. They will develop a labeled reaction model and a test log documenting temperature changes, observations, peer critiques, and modifications to a teacher-approved demonstration device. The final product will be a live science showcase station where teams safely demonstrate the reaction, explain its chemical and thermal-energy changes, and answer audience questions. Each student will also submit a brief reflection on growth in explaining chemical reactions and the collaboration habits that helped the group succeed.
Launch
Begin with a teacher-led, small-scale elephant toothpaste demonstration using classroom-safe materials, goggles, gloves, and a spill tray while students observe without touching the reaction. Teams record evidence of foam, gas production, and temperature change, then develop a claim about what caused each sign. Students generate focused questions about the reaction and its energy changes, sort them into researchable categories, and select one to investigate using several credible sources. Close with teams sketching an initial safe showcase-station design and exchanging evidence-based questions and feedback.
Exhibition
Host a science showcase where each small group runs a live elephant toothpaste station using goggles, trays, and teacher-approved materials while visitors observe from a marked distance. Students use temperature data and a visual model to explain what causes the foam, oxygen gas, and heat, citing evidence from several research sources and describing how they tested and improved their setup. Visitors ask questions and leave evidence-based feedback, which students receive respectfully and use to clarify their explanations. Each student concludes by sharing a brief reflection on growth in explaining chemical reactions and the collaboration habits that helped the group succeed.
