Half-Size Human Circulatory System Model, Compact Gifts_Bar fanning apart visibly when a

fanning apart visibly when a charged rod approaches to demonstrate electrostatic repulsion and induction

5 newtons for measuring small forces during spring-law and tension-force classroom investigations

Ninety-five-piece molecular model set with 53 atoms and 42 links spanning organic and inorganic chemistry

25x with a 5

producing oxygen's characteristic emission lines for spectroscope viewing of atomic-emission and quantum-energy levels

Half-Size Human Circulatory System Model, Compact Gifts_Bar fanning apart visibly when aSized for compact classroom display, the half size circulatory model traces arterial and venous pathways from heart to peripheral capillaries.