A very simple and fun science experiment involves limestone and a little vinegar. A chemical reaction occurs when vinegar comes in contact with limestone. Small bubbles rise off the limestone and a little heat is produced by the chemical reaction.
Steps to be taken
1. Pour a half cup of vinegar into a glass. 2. Add a small chunk of limestone rock. 3. Watch closely. After a few minutes the rock will start to fizz. 4. The fizzing little bubbles forming are carbon dioxide rising to the surface of the vinegar. These rising bubbles are the same as bubbles in soda pop. 5. Now try the same test with other rocks and minerals. You may not see any bubbles.
How it happens?
Vinegar, an acid, dissolves bits of a material called calcium carbonate in the limestone. This releases carbon dioxide, a gas that rises to the surface as a stream of bubbles. Rocks that don't contain calcium carbonate won't fizz.
Small chunk of limestone rock (Find limestone outside using a rock identification book or buy a piece at a shop)