These 1/4 inch thick black streak plates are ideal for testing the hardness or softness of minerals, as well as determining the color of lighter-colored minerals. By scratching the mineral in question against the plates, students or teachers can determine these properties by observing the quantity and hue of the residue left behind. Excellent for use in the classroom, or at home for aspiring geologists.
Build over 100 exciting electronic projects with this easy to use kit!
Cool new Pi tee featuring ultra soft and light blue 100% cotton shirt.
Build over 60 projects with this deluxe version of the Snap Rover kit!
This advanced physics kit is perfect for older children already versed in physics knowledge!
This kit focuses on teaching children about electricity and how electronic devices work!
This project book and sample kit introduces you to shape-memory alloy technology!
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