Students will collaboratively design, build, test, and improve a clay volcano with a teacher-supervised elephant-toothpaste reaction to model how pressure and energy release can produce an eruption. They will investigate how different ingredients affect eruption size and speed and determine which materials and design choices create a safe, clear demonstration. Teams will use observations and data to explain how Earth’s materials cycle, how energy drives volcanic processes, and what a homemade model can—and cannot—show about real eruptions. Through shared roles, peer feedback, and a final presentation, students will defend design decisions, communicate evidence, and reflect on improvements.

Students will develop and refine an air-dry clay volcano model that explains how Earth’s internal energy drives material cycling, pressure buildup, and eruption. They will ask testable questions, vary one ingredient at a time in a teacher-approved foaming reaction, and measure eruption size, speed, and temperature change. Teams will use evidence to select materials and design choices that produce a safe, clear eruption while identifying the model’s similarities to and limitations in representing real volcanoes. Students will share responsibilities, use peer and teacher feedback to improve their designs, and communicate evidence-based explanations of what homemade volcanoes can teach us about eruptions.

Teams will create a labeled design plan for an air-dry-clay volcano that models magma movement, pressure buildup, energy flow, eruption, cooling, and rock recycling. They will develop testable questions and collect data on how changing one ingredient affects foam height, eruption speed, and temperature using teacher-approved 3% hydrogen peroxide, yeast, goggles, gloves, and a spill tray. Using their evidence, teams will revise the model and its reaction chamber to produce a safe, visible eruption while clearly distinguishing the foam reaction from a real volcanic eruption. Each team will present the final model, data display, scientific explanation, design decisions, and an individual reflection incorporating peer and teacher feedback.

Begin with contrasting videos of quiet and explosive eruptions, then have students record observations and questions about pressure, energy, and cycling Earth materials. Conduct a teacher-led elephant-toothpaste demonstration using 3% hydrogen peroxide in an open container on a tray; students wear goggles, keep their distance, and measure foam height, eruption time, and temperature change without touching the materials. Teams discuss how ingredients and design choices affect eruption size and speed, while identifying where the model does and does not represent real volcanic processes. Students then sketch a safe clay volcano, assign team roles, and propose one testable question about how their model can clearly show pressure building and releasing inside Earth.

Host a Volcano Science Expo where teams display their air-dry clay models and conduct teacher-approved, low-concentration “elephant toothpaste” eruptions in spill trays while wearing goggles. Students use measured results to explain how ingredients and design choices affect eruption size and speed, while distinguishing the chemical reaction from the pressure, energy flow, and material cycling in real volcanoes. Each team presents how its model answers the five essential questions, describes revisions made after testing, and invites visitors to ask evidence-based questions. Visitors provide brief feedback on the model’s safety, clarity, and scientific accuracy.