What happens when you add an acid like vinegar to natural chalk? We tried this demonstration back in 2016 with chalkboard chalk and were disappointed because chalkboard chalk is not made from naturally occuring chalk, and this project, based on the book Mountains and Volcanoes by Barbara Taylor, calls for natural chalk. After some searching, I found edible chalk which is all natural and bought a small amount for this demonstration. Please note that although this is edible, we will not be eating it. We began the project by mixing our acid with other bases like baking powder (base with acid), baking soda (base), chalk, plaster of Paris and even a calcium supplement (check out the blog post to see the progression of that demonstration). This time, we saw immediate bubbling and dissolving of the natural chalk. This demonstration was to show how slightly acidic rain can erode rocks (especially limestone) over time.
You can find the complete list of materials we used for this unit, including pictures, links and descriptions of each book or kit, videos, resources and more at the blog post that accompanies this video:
www.pepperandpine.com/mineral...
Check out the Mineralogy, Earth Science and Geology playlist for projects, resources and more!
• Geology, Mineralogy an...
Natural chalk was purchased from Amazon. Other materials were purchased from the grocery stores.
amzn.to/3yhjHxg
Find me here:
/ pepperandpine
/ pepperandpine
/ pepperandpine
www.pepperandpine.com
6 авг 2024
