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Coriolis Effect Kit
Coriolis Effect Kit
15232

Used to simulate effect of earth's rotation on winds, ocean currents or unattached objects such as rockets. As sphere is launched across surface of base, when it is static, sphere traces a straight line. As turntable is put in motion, centrifugal force launches the sphere which, though traveling in a straight line, leaves a curved trace on rotating surface. Size of curve is in direct ratio to speed of rotation. Each kit includes one 14" diam. base (with outer retaining trough) mounted on a turntable, and featuring a reusable "magic slate" type erasable trace recording surface, removable launcher, 5/8" diameter steel spheres.

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$34.95 Each
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Deposition Observation Water Tank Kit
Deposition Observation Water Tank Kit
16982

Watch how solids settle in layers at the bottom of a tank. Includes: Acrylics tank, slope, open tube, plastic drain tube and sprinkler head for plastic bottle. Dimensions: Tank - 11.8" x 2.8" x 5.9", Slope - 11.2" x 2.5" x 0.79", Open tube - 13" x 2.5" x 3.1", Plastic drain tube - 3.9"

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$50 Each $82.95 Each
Investigating Non-Renewable Resources
Investigating Non-Renewable Resources
15851

Students explore North America's mineral and rock resources and how man uses them all. Mounted natural specimens and corresponding man made products (i.e. gypsum and wallboard, bauxite and aluminum) are placed on a map of North America. 18"x24" in wood frame. Grades 6-12.

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$49.95 Each
Investigating Plate Tectonics Chart (for 15472)
Investigating Plate Tectonics Chart (for 15472)
15474

Wood framed reference chart, complete with mounted specimens. The evidence supporting the theory of Plate Tectonics is shown on this chart. Rock specimens that illustrate the variety of processes related to the Earth's dynamic crust are mounted on this 18" X 24" chart. Grades: 4 - 12.

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$49.95 Each
Investigating Renewable Resources
Investigating Renewable Resources
15850

The relationship between resources that are renewable in one human life span and the associated products are clearly illustrated on this visually appealing chart. Students will be enticed to investigate the worldwide resources for materials they use every day. This chart complements the Investigating Non-Resources chart. Representative natural materials and the corresponding everyday products are mounted on a sturdy, wood framed 18"x 24" image. Grades 6-12.

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$49.95 Each
World Relief Map
World Relief Map
15037

Full-color molded plastic relief map. Correlate landforms with political boundaries, cities, agricultural developments. Includes time zones, scales and color keys to terrain, vegetation and ocean features. Keys to populations of major cities, national capitals, major ocean depths, and Antarctic expedition bases. 36" x 20".

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$28.95 Each