American Educational Environmental Ecology Seed Kit -

American Educational Environmental Ecology Seed Kit Learners observe the effects of three doses of gamma irradiation on seeds and compare with control seeds The effects of ionizing radiation can be seen within 48 hours The experiment can be completed within 2 weeks Kit contains enough material for 30 students working individually, comprehensive teachers guide, and reproducible student worksheets For grades 6 to 12 WARNING: CHOKING HAZARD -- Small parts. Not for children under 3 yrs.