In this fun and easy geology science experiment, we’re going to explore and investigate one simple method to identify rocks using a common household item you probably already have in your kitchen.
  • Several rock specimens
  • Limestone specimen
  • Marble specimen
  • Lemon juice


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  1. Pour lemon juice over the rock specimens.
  2. The lemon juice will bubble on some of the specimens.
  3. Specimens that contains a carbonate form of calcium will bubble. This reaction helps geologists segment out specimens and begin to identify the rocks. Your limestone specimen is composed primarily of calcium carbonate and should bubble when dripped with lemon juice. This is just one method to help geologists attempt to identify rocks. 


I hope you enjoyed this super quick tutorial and had fun exploring this method of identifying rocks. 
Pro tip: Use this activity to create some excitement around discussions or lessons about rocks, geology, and more!
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