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Color-coded hour and minute hands
Adrenal glands
the rods represent the number 10
The beads are grouped in fives and tens and one side is marked with 1000
Dielectric Constant: 24
GEO-logic Hardness Set Electric Anatomy Models Color-coded hour and minute handsA Complete Kit to Communicate the Concept of Hardness in Minerals Developed jointly by experienced educators and Ward's staff geologists. Classroom tested for dependability. Designed to save valuable planning and preparation time. Students will understand the differences in mineral composition when they use our GEO logic set to investigate variations in mineral hardness. A teacher's guide and student copy masters are included for the following
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