The Science Behind Bubbling Lava Lamps

Overview

Curious about what causes those mesmerizing bubbles in lava lamps? In this episode of STEM Unplugged, students will make their own lava lamp using a few common household items while getting a quick lesson on density and chemical reactions. 

Supplies 

• Oil 
• Water 
• Clear container 
• Alka Seltzer tablets 
• Plate or tray 
• Optional: food coloring