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

1 pound of black sand packaged in a heat-sealed bag.

Massive, chlorite-rich.

Light gray, fine-grained, well-foliated, schistose.

Gray-to-brown basaltic, with over 50% vesicles.

Red-brown to gray, coarse-grained, containing feldspar and mica.

Dark, coarse-grained, and composed chiefly of hornblende.

Gray to brown mudstone with abundant silt.

Gray, fine-grained, massive contact rock.

White, very dark green, and very dark red to light red granoblastic intergrowth of wollastonite, diopside, and andradite.

Classic, very coarse-grained igneous texture.