"Ward's® Thermochemistry In The Bag Inquiry Demonstration Activities"

Medium-grained with biotite.

Students investigate the case of a family poisoned by household pesticides used to treat a bed bug problem.

Slaty cleavage; contains hematite.

Light gray, with flow structure.

Educational Materials, Mechanics, Application: Physics, Wire, Insulated Copper 10 ft, 22 G, Red

Spinel group; iron-black, massive; natural magnet.

Deep purple crystal clusters.

Dark gray, with hornblende as the dominant mafic mineral.

Typical green-gray, fissile, clay-rich.

Well-cemented, medium-grained orthoquartzite.

Hematite-cemented quartz; orthoquartzite.

Chlorite-bearing.

Classic, dark; from the Columbia Plateau.

Nearly pure, green crystalline forsterite.

Fine to medium-grained with biotite.

Clear, pure cleavages, Mohs’ hardness of 2.