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How to make speleothems

First you take two jam-, mustard- or similar jars and fill it up with water. From the chemist get some sodium carbonate, which you now stir into the water until there is a saturated solution. You see that when the sodium carbonate deposits on the ground and no longer dissolves.

Now you put a string in the water and wait for a few days. The result you can see right on the image.

The explanation is simple: the string saturated with water drips at its lowest point on the plate. The water evaporates, leaving behind the sodium carbonate you stirred in previously. A little tip, this works much better in summer than in winter. In winter you will encounter the same as me: most of the water only evaporates at the plate, taking a long time to create a stalactite.

Send in from Ronnie Berzins

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