News, STEM, Wellness and Wellbeing Fourth Class science- Lava Lamps 16th November 2022 Donal Neville Carrying out our experimemt Adding food colouring Adding effervescent tablets The reaction of the tablets causing the water bubbles to displace before the weight of the water bubble brings it back to the bottom The water bubbles rise and drop through the oil because the water is heavier The reaction produces the effects of a lava lamp