Every Home Needs a Foundation 

Information about rock formations of South Florida

Materials you will need:
    In the field:
                        magnifying lens,
                        small plastic bags that can seal,
    In the classroom (optional):
                        weak solution of hydrochloric acid
                        dropper pipettes

Instructions to follow:

1. Find an area in your biotic community where some
   of the original rock is exposed.  You may have to
   move some dirt and plants out of the way to find some.
2. Carefully collect some rock samples.
    Study the rock.  Use the magnifier to get a better
    view. If you  bring the samples back to the classroom,
    you can use the identification pictures to help you
    with identification.
3. Find out which form of limestone you have:

4. Prove that the rock is made of limestone.
   If you do this in the field, you must bring the acid
   solution with you.
   Place two small samples of the rock in an open area
   of just soil.
   In the classroom, place them into two separate beakers.
   Put 2 or 3 drops of water on one sample.
   Put 2 or 3 drops of acid on the other sample.
   Look for bubbles to form.
   They will be bubbles of carbon dioxide.
   Acid added to limestone creates carbon dioxide.

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