Lewis structure Set, Help students determine the types of bonds in a substance, draw Lewis structures, and construct models of molecules, Chemists find the use of models helpful to construct Lewis structures and study covalent bonding
Model Fossil Hominid Tools, Set of 6 includes an Acheulian Banded Flint Hand-Axe; a Mousterian Neanderthal Triangular Bi-facial Hand-Axe; a Mousterian Bi-facial ovate poinT; a Mid-Acheulian Cordiform Bi-facial Hand-Axe; a Mousterian 40,000 year old scraper
Model Hominid Tools from East Africa, 1.5-1.2 MYA, set of 6 Oldowan and Acheulean artifacts includes hand axes, choppers, a cleaver and spheroid tool from East Africa.
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