Experiment: Solving Dissolving

It takes a long time for a cenote to form.

Rain water absorbs a gas (carbon dioxide) from the air and forms a weak acid. As this trickles down through tiny cracks in the limestone, the weak acid dissolves a mineral in the limestone called calcite. Over time the limestone is dissolved and a cenote is formed.

Collect:

Try It:

Put three drops of water on the chalk. - What happens?

Put three drops of vinegar on the chalk. - What happens?

Chalk is made from limestone. Vinegar is a weak acid.

Try other liquids.- Did you find weak acids?

Number your rocks and print the logbook sheet.

Compare these rocks to the limestone. - Record your results.


"If vinegar does that to a rock, what does it do to my stomach?" - Dontay Caraway, SMM Youth Assistant.


Activity List