Video: Stem Unplugged

The Science Behind Bubbling Lava Lamps

  • STEM
  • Science (Physical)


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.


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