With the Force Mechanism Trough, students can research acceleration and the effect of gravity on a moving body by propelling steel balls or a wood blo...
Three stages of fun investigation and experimentation can be adapted for completion in 12 class periods or extended as a year long project. Designed t...
Each pocket-sized volume contains hundreds of illustrations and descriptions of the most common, important, and striking examples of each type of spec...
Designed for high school and elementary college courses, these rock and mineral specimens provide a complete range of materials for comparisons of ign...
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