About This Lesson
The chemistry and geology of industrial sand in the Upper Midwest is relatively simple and very ancient. Sand is made up primarily of quartz. It’s silica, or SiO2. It’s the most common silica crystal and the second most common mineral on the earth. And because of its chemical and physical properties, it’s key in making many of things that make our modern lives possible. Rather than simply tell you, watch the video above to get a better idea. Doing your own online research will reveal even more uses.
