This week we have been making lava lamps in test tubes in science class. We put a quater of water in the tubes and then filled the rest up with oil and added food colouring and it mixed with the water in the bottom. The reason the water was in the bottom is because oil is lighter then water so the water stays in bottom. Alker selza doesnt react with oil so it just sinks to the water and fizzes up. The bubbles bring food colouring up and makes it look like a lava lamp.
from Jake
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