Effectiveness of Sunscreen, Kit, Kit Includes: 15ml SPF 15, 15ml SPF 30, 1 Box Microscope Slides, Electromagnetic radiation in the UV range of the spectrum cannot be perceived by the human eye. Using the Neulog* UVB sensor designed to measure UVB radiation.
Kit, Stem Investigations: Design A Biodegradable Plastic, Includes: 25 mL Glycerin, 75 mL Vinegar, 175 g Gelatin, 125 g Starch, 45 Petri dishes, 30 Pipettes, contains enough materials for 15 groups. Teacher's Manual and Student Study Guide copy masters are included
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