"STEM kits"

This kit is a unique teaching tool for introducing students to the chemistry behind plant pigments (the blueberry bio-pigment cyanidin) and how they can be used as pH indicators and fabric dyes.

Students use several techniques to investigate the location, methods, and mechanisms of transpiration in plants. Students first determine the source of water loss and confirm their findings with a qualitative chemical test. Then they prepare microscope slides of xylem in stem tissue, and prepare a leaf imprint using an innovative method that vividly highlights stomate structures. Finally, using WARD’S specially-designed potometer and supplied materials, students subject bean seedlings to varying environmental conditions to determine how transpiration is affected. You’ll get enough materials for eight setups, a teacher’s guide, and student copymaster.

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Earthy, yellow brown iron ore.

Obsidian is hard black colored, volcanic glass.

Massive sedimentary gypsum with a moh's hardness 2..

Porphyritic igneous rock containing biotite, feldspar, and hornblende.

Pegmatite is igneous rock similar to granite but with larger crystals.

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Pumice is light colored glassy rock that floats in water.

Conglomerate is a sedimentary rock made up rounded quartz pebbles.

White to gray, medium to coarse-grained, crystalline.

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