SECCHI DISK WITH NYLON CORD
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Testing Turbidity?
Environmental Science teachers, how about showing your students how to test water’s visibility and hence turbidity--or its opposite, clarity--with our freshwater Secchi disk? (We thought you’d like the idea.) The disk is just under 8” dia with an integral weight and alternating black and white quadrants, attached to a 72-foot nylon cord marked every foot with a hash mark. Just lower it into water and you’ll have your results, and teaching points.SHARE
Ohaus made giant bow calipers. Use them to measure outside diameters (like balls, boxes, your head, your waist), inside diameters (like cylinders and boxes). They are 15" long when folded and even have a graduated side in MM to measure depth. A very cool teaching tool. Includes a teaching aid instruction sheet. Max outside diameter is 25" (635Cm)
Ohaus made giant bow calipers. Use them to measure outside diameters (like balls, boxes, your head, your waist), inside diameters (like cylinders and boxes). They are 15" long when folded and even have a graduated side in MM to measure depth. A very cool teaching tool. Includes a teaching aid instruction sheet. Max outside diameter is 25" (635Cm)
They might as well learn something while they're trying to outlast you on eating those lima beans. Set the table with educational placemats and they'll be at least a touch smarter after dinner, even if their vegetable intake is low. These laminated, 12" x 17-3/8" mats have full-color fronts, black-and-white backs. Choose the United States Map, Stars & Constellations, the Periodic Table of Elements or The Metric System.
They might as well learn something while they're trying to outlast you on eating those lima beans. Set the table with educational placemats and they'll be at least a touch smarter after dinner, even if their vegetable intake is low. These laminated, 12" x 17-3/8" mats have full-color fronts, black-and-white backs. Choose the United States Map, Stars & Constellations, the Periodic Table of Elements or The Metric System.
An easy way to light up the kids' eyes! Teach them to wire a simple circuit with our basic components.
An easy way to light up the kids' eyes! Teach them to wire a simple circuit with our basic components.
Our compact 4” dia globes have smooth dual axes rotation and measure 5" wide x 6" high overall, including the nice black stand they’re attached to. All show their features in excellent detail. You pick: the Moon globe, showing craters, seas, rilles, valleys, mountain ranges and landing sites of manned and unmanned missions; the Celestial globe with stars, constellations and celestial images by noted German cartographer Karl Harig; the Political globe with an easy-to-read map indicating political borders and capital cities; the Antique-Style Political globe, which is like the Political globe, but old-time looking; or the Satellite globe, which shows the landmasses and oceans of earth as they appear from satellites. A few different globes next to each other make for a really great display, but they’re all nice enough to stand alone.
Our compact 4” dia globes have smooth dual axes rotation and measure 5" wide x 6" high overall, including the nice black stand they’re attached to. All show their features in excellent detail. You pick: the Moon globe, showing craters, seas, rilles, valleys, mountain ranges and landing sites of manned and unmanned missions; the Celestial globe with stars, constellations and celestial images by noted German cartographer Karl Harig; the Political globe with an easy-to-read map indicating political borders and capital cities; the Antique-Style Political globe, which is like the Political globe, but old-time looking; or the Satellite globe, which shows the landmasses and oceans of earth as they appear from satellites. A few different globes next to each other make for a really great display, but they’re all nice enough to stand alone.
The next best thing to lightning bolts! 200,000 volts of electrostatic energy created by our Van de Graaff generator. Measures 6-1/2” diameter by 15” tall, includes a spare belt and a set of instructions detailing lots of fun experiments. For grade 6 and up. This is not a toy and should be used under adult supervision. A great tool for teaching about electricity. For your convenience, we now have Lightning Belts: replacement belts to drive that overworked generator. Operates on Standard 120 VAC with the included 3' cord.
The next best thing to lightning bolts! 200,000 volts of electrostatic energy created by our Van de Graaff generator. Measures 6-1/2” diameter by 15” tall, includes a spare belt and a set of instructions detailing lots of fun experiments. For grade 6 and up. This is not a toy and should be used under adult supervision. A great tool for teaching about electricity. For your convenience, we now have Lightning Belts: replacement belts to drive that overworked generator. Operates on Standard 120 VAC with the included 3' cord.
Same here. Try the Ferrofluid Magnetic Display, a little sealed bottle with virtually fluid nano-particles of ferrous metal suspended in liquid. You’ll get (4) powerful 1/2” dia x 3/16” neodymium disc magnets, (2) of them attached to chess-pawnish holders. Move the magnets in assorted combinations around the bottle for fascinating effects. Sort of the marriage of science with desk toys, but students can’t spill these particles all over the place.
Same here. Try the Ferrofluid Magnetic Display, a little sealed bottle with virtually fluid nano-particles of ferrous metal suspended in liquid. You’ll get (4) powerful 1/2” dia x 3/16” neodymium disc magnets, (2) of them attached to chess-pawnish holders. Move the magnets in assorted combinations around the bottle for fascinating effects. Sort of the marriage of science with desk toys, but students can’t spill these particles all over the place.
Classroom and Science Fair alert: Now you can order an 8-pack of metals and metal alloys for demonstration purposes. Each pack of 1" dia x 1/32" thick discs includes aluminum, bronze, brass, copper, n/silver (w/nickel), m/steel (mild: low carbon), stainless steel, and zinc. Composition of each is stamped on one side of the discs.
Classroom and Science Fair alert: Now you can order an 8-pack of metals and metal alloys for demonstration purposes. Each pack of 1" dia x 1/32" thick discs includes aluminum, bronze, brass, copper, n/silver (w/nickel), m/steel (mild: low carbon), stainless steel, and zinc. Composition of each is stamped on one side of the discs.
The human body is a puzzle, really. Get a head-start on anatomy class with one of these anatomically correct breakaway models in authentically colored plastic with detailed cross-sections. Pick the 2" tall, 7-piece eyeball; the 3-1/2" tall, 6-piece human heart; or the 3-3/8" tall, 6-piece rubber and plastic human head/skull/brain. All stand on 3" square bases.
The human body is a puzzle, really. Get a head-start on anatomy class with one of these anatomically correct breakaway models in authentically colored plastic with detailed cross-sections. Pick the 2" tall, 7-piece eyeball; the 3-1/2" tall, 6-piece human heart; or the 3-3/8" tall, 6-piece rubber and plastic human head/skull/brain. All stand on 3" square bases.
That's what you get with this tesla coil!! Brand new, commercial item, great for classroom demonstrations and experiments. The 50,000 volt capacity generator radiates high frequency energy through space... enough to light fluorescent tubes two feet away. It uses 115 VAC (60 Hz) with an electro-magnetically operated interrupter buzzer, high voltage capacitors, inductive coil transformer, and a monopolar high frequency transformer generator to do the trick. 11" high, with a 6" sq. x 2" high protective housing for the generator. Includes accessories and instruction booklet with 19 experiments. Pretty amazing. But please, this is not a toy and should be used only under adult supervision.
That's what you get with this tesla coil!! Brand new, commercial item, great for classroom demonstrations and experiments. The 50,000 volt capacity generator radiates high frequency energy through space... enough to light fluorescent tubes two feet away. It uses 115 VAC (60 Hz) with an electro-magnetically operated interrupter buzzer, high voltage capacitors, inductive coil transformer, and a monopolar high frequency transformer generator to do the trick. 11" high, with a 6" sq. x 2" high protective housing for the generator. Includes accessories and instruction booklet with 19 experiments. Pretty amazing. But please, this is not a toy and should be used only under adult supervision.