Apologia General Science Module Six Experiment 6.4

Apologia General Science Module Six Experiment 6.4

 Experiment 6.4: Chemical Weathering "A"

Vinegar, limestone, a bowl, steel wool and time

Put a limestone rock in a jar, add vinegar to cover over the rock.  Our kit wanted us to use a bowl, but I liked this jar better.  You can immediately see the bubbles raising up from the rock.

The Point: 
Can you see the flow of bubbles rising up?  The bubbles are the LIME leaving the rock!  This is a chemical weathering example, b/c the vinegar is changing the composition of the rock.  In the end this rock will not be a limestone anymore!

Two days later....

Chemical Weathering "B"

A bowl, vinegar, and a little steel wool
The vinegar is a mild acid, and will eat away the steel and turn it ti rust.  This process is a Chemical Weathering.

 UPDATE: Two days later:

The steel wool is still not rusting after two days.