WASHINGTON -- Seashells are made mostly of calcium carbonate, also known as chalk, a mineral soft and crumbly enough to use for sidewalk doodles. Yet seashells are tough and resilient. In this video, Reactions explains why seashells are so different, and why you can't use them to draw on your driveway:
WATCH: Why seashells are tougher than chalk
Read next: MEPs Demand EU Answers on UNRWA's Claimed Reform Following UN Watch Investigation
Email Us | Reader Friendly | Comments
American Chemical Society——Bio and Archives
American Chemical Society, ACS is a congressionally chartered independent membership organization which represents professionals at all degree levels and in all fields of chemistry and sciences that involve chemistry.