Products

Earth Science Kit

Cavendish Gravitation Balance Cavendish Gravitation Balance
1600-5
This classic instrument is used to measure the value of G (gravitational constant) the same way Sir Henry Cavendish did in 1789. Consists of a pair of small lead balls mounted on a "T" member suspended with a thin wire and a pair of large lead balls. Oil damping is provided for faster results. Requires a laser ( not included )
seismic record Seismographer
S760

For students to make/record earthquake waves. The devices draws zip-zap if ground shakes. The stronger the shaking, the sharper the zig-zags. This zig-zag picture made on the paper roll is called a seismogram.
Foucault Pendulum Apparatus Foucault Pendulum Apparatus
1600-8

This unit is for measuring the Earth's rotation in
a smaller scale with this innovative instrument.
A unique energy compensation mechanism
enables continuous operation of the pendulum; glass windows shield the unit from drafts for uninterrupted, precision measurements; and a special 360° scale enables exact recording of directions. Designed for in depth analysis and advanced studies, this Foucault's Pendulum
features amplitude adjustment and built-in illumination.
Size: 40.6 x 40.6 x 144.8 cm;
Weight: 110 lbs.
Coriolis Effect Kit Coriolis Effect Kit
3226

As the steel spheres track a pattern on the kit's turntable, students simulate the effect of the
earth's rotation on winds, ocean, currents, and material objects. Each kit includes one 14" diameter base with erasable tracing surface mounted on a turntable, removable launch structure, two 5/8" diameter steel spheres.
Simple Harmonic Oscillation Projection Demonstrator Simple Harmonic Oscillation Projection Demonstrator
J2220
This unit can draw oscillation image from oscillation object directly, and the image can be reflected at the screen by projector so that the students in classroom can observe at same time. It has the features of easy operation, vivid image and excellent teaching results.
Secchi Disc Secchi Disc
S503 
The Secchi disk is used to measure water transparency in oceans and lakes. The disc is mounted on a pole or line, and lowered slowly down in the water. The depth at which the pattern on the disk is no longer visible is taken as a measure of the transparency of the water. This measure is known as the Secchi depth and is related to water turbidity.