Ms. Shannon’s 3rd class made lava lamps using a 1.5L bottle, vegetable oil, water, food colouring and an alka seltzer tablet.When the tablet was added to the mixture it sank to the bottom and started dissolving and creating gas.  As the bubbles rose they took some of the food colouring and this created coloured bubbles which circulated the bottle until the tablet finished dissolving.

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