Find an old candle that is not used around the house. Peel and shave the candle into small shavings.
, Pack it neatly with your fingers., Allow the wax to heat up and melt, but do not let the wax boil. Heat the wax until the test tube forms a small amount of vapor and smoke in the bottom of the tube., The wax will immediately explode., When the test tube is placed in the cold water, the drinking glass starts to create these tiny cracks, causing the water to enter and go in the tube. The water starts to vaporize which makes a micro explosion. When you place the hot wax in the cold water, oxygen supersedes from the tube.
Shave an old candle.Pour cold water in a large drinking glass.
Place the wax in a science test tube.
Heat the wax next to a bunsen burner by holding the test tube with tongs.
Place the science test tube in the cold water.
Understand why it happens.
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