Mohs hardness scale was invented by Friedrich Mohs in 1812. Since that moment, the Mohs hardness scale has assisted geologist in determining the identity of minerals. With innovating science’s Mohs hardness kit students, will become familiar with Mohs hardness scale and develop vital skills that will help them throughout their studies in earth science. This kit also provides an opportunity to go out into their local environment and investigate the relative hardness of the minerals around them. Aligned to the Next Generation Science Standards (NGSS)* Disciplinary Core Ideas: PS1.A Performance Expectations: MS-PS1-3 Cross Cutting Concepts: Structure and Function Engineering Practices: Obtaining, Evaluating and Communicating Information Kit Includes: 1 bag Sample A, 15 Pieces 1 bag Sample B, 15 Pieces 1 bag Sample C, 15 Pieces 1 bag Sample D, 15 Pieces 35 Pieces of Aluminum Foil 35 Scratch Plates 35 Streak Plates DOT Info: Non-regulated *”Next Generation Science Standards” is a registered trademark of Achieve. Neither Achieve nor the lead states and partners that developed the Next Generation Science Standards was involved in the production of, and does not endorse, this product. WARNING: This product can expose you to chemicals including Respirable crystalline silica, which is known to the State of California to cause cancer. For more information go to http://www.P65Warnings.ca.gov.