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Halls Cars, Aluminum Wheels
The one-piece aluminum wheels and axles mount in cone bearings for low friction operation. One piece plastic body. You need inclined plane, and weights.
Hand Generator
This hand-driven generator when wound, creates about 5 volts of direct current. The faster the student turns the handle, the brighter the bulb glows. It is an ideal tool for learning about generators and how mechanical energy is converted to electrical energy. The clear housing allows students to watch the coils, terminals and gears.
High Precision Digital Stroboscope
12-15,000 flashes/ minute The 5-digit LED digital readout on this economical stroboscope gives the exact number of flashes per second. Features include: xenon flashlamp, solid-state design, 3 modes (RPM, Hz and mSec). Can use internal or external signal source. Can be fine-tuned. Uses 120V AC, 60/50 Hz operation.
Holographic Diffraction Gratings
Holographic Diffraction Grating This specially developed, high-efficiency diffraction grating is 100 times more efficient than acetate gratings. It can produce a spectrum bright enough for vivid classroom discussions even in rooms that do not darken. The shape of the grating surface produces a dispersion angle of 23.5 degrees and a groove separation of 19,050 lines per inch (750 lines per mm) for a wavelength of 550 nm. The sinusoidal shape of the grating surface places most of the light in the first order image. This shape is embossed in a polyester plastic. It can be used to make a spectrometer, a spectrum projector, or used with an overhead projector to produce a projected spectrum for demonstration purposes. Some of the gratings come with four color filters: blue, red, green, and yellow. Used singly and in combination, you can demonstrate how light is affected by color filters, or how objects of a certain color appear when bathed in light of another color.
Hot / Cold Hand Protector Glove
One size rubber mitt that fits most hands and protects hands when handling hot or cold labware. Features studded surfaces for good grip.
Ice Melting Set
A new twist on the ?black box?............ Our black blocks look alike, but do they feel alike? More importantly, do they act alike?
Here?s an interesting and irrefutable way to prove the difference in heat conductivity in different metals. Place an ice cube on each of two similar black blocks at room temperature, sit back and watch. Do they melt at the same rate? Why or why not? The ?cooler? block is of aluminum, which is an excellent conductor of heat. The ?warmer? block is of plastic foam, which is a very poor conductor of heat. Contains: two black blocks with rim to prevent spillage, instructions with theory. This demo is great for all the doubting Thomases in your elementary through high school classes. Fast, easy and fascinating.
Induction Kit
| This comprehensive kit contains all of the necessary pieces for an understanding of electrical induction, magnetic fields, electromagnets, motors, AC/DC motors, basic transformers, series and parallel transformers, and many other applications. The kit features snap together frames for laminated or solid core transformer frames, motor mounts, field coils, and Thompson ring experiments. Includes fitted case and instructions. Requires power supply and meter. |
| 45-075 Induction Kit includes: |
| • Laminated "U" core in plastic frame |
| • Laminated "I" beam in plastic frame |
| • Empty frame for iron cores or motor mounting |
| • (2) small frames for attachments |
| • 600 turn primary coil |
| • 300 turn secondary coil |
| • (2) empty coils for winding experiments |
| • Long solid iron core |
| • (2) short solid iron cores |
| • AC induction motor in laminated frame |
| • Coil of magnet wire for winding |
| • Levitating Thompson ring |
| • Magnetic motor rotor |
| • (2) mini compasses |
| • (2) bar magnets |
| • Alligator clips |
| • Rubber bands |
| • Winding coil contacts |
| • Aluminum Lenz' Law disc on shaft |
| • Connecting wires with banana plugs |
| • Sturdy fitted case |
| • Instructions |
Induction Kit
| This comprehensive kit contains all of the necessary pieces for an understanding of electrical induction, magnetic fields, electromagnets, motors, AC/DC motors, basic transformers, series and parallel transformers, and many other applications. The kit features snap together frames for laminated or solid core transformer frames, motor mounts, field coils, and Thompson ring experiments. Includes fitted case and instructions. Requires power supply and meter. |
| 45-075 Induction Kit includes: |
| • Laminated "U" core in plastic frame |
| • Laminated "I" beam in plastic frame |
| • Empty frame for iron cores or motor mounting |
| • (2) small frames for attachments |
| • 600 turn primary coil |
| • 300 turn secondary coil |
| • (2) empty coils for winding experiments |
| • Long solid iron core |
| • (2) short solid iron cores |
| • AC induction motor in laminated frame |
| • Coil of magnet wire for winding |
| • Levitating Thompson ring |
| • Magnetic motor rotor |
| • (2) mini compasses |
| • (2) bar magnets |
| • Alligator clips |
| • Rubber bands |
| • Winding coil contacts |
| • Aluminum Lenz' Law disc on shaft |
| • Connecting wires with banana plugs |
| • Sturdy fitted case |
| • Instructions |
Induction Kit
| This comprehensive kit contains all of the necessary pieces for an understanding of electrical induction, magnetic fields, electromagnets, motors, AC/DC motors, basic transformers, series and parallel transformers, and many other applications. The kit features snap together frames for laminated or solid core transformer frames, motor mounts, field coils, and Thompson ring experiments. Includes fitted case and instructions. Requires power supply and meter. |
| 45-075 Induction Kit includes: |
| • Laminated "U" core in plastic frame |
| • Laminated "I" beam in plastic frame |
| • Empty frame for iron cores or motor mounting |
| • (2) small frames for attachments |
| • 600 turn primary coil |
| • 300 turn secondary coil |
| • (2) empty coils for winding experiments |
| • Long solid iron core |
| • (2) short solid iron cores |
| • AC induction motor in laminated frame |
| • Coil of magnet wire for winding |
| • Levitating Thompson ring |
| • Magnetic motor rotor |
| • (2) mini compasses |
| • (2) bar magnets |
| • Alligator clips |
| • Rubber bands |
| • Winding coil contacts |
| • Aluminum Lenz' Law disc on shaft |
| • Connecting wires with banana plugs |
| • Sturdy fitted case |
| • Instructions |
Induction Kit
| This comprehensive kit contains all of the necessary pieces for an understanding of electrical induction, magnetic fields, electromagnets, motors, AC/DC motors, basic transformers, series and parallel transformers, and many other applications. The kit features snap together frames for laminated or solid core transformer frames, motor mounts, field coils, and Thompson ring experiments. Includes fitted case and instructions. Requires power supply and meter. |
| 45-075 Induction Kit includes: |
| • Laminated "U" core in plastic frame |
| • Laminated "I" beam in plastic frame |
| • Empty frame for iron cores or motor mounting |
| • (2) small frames for attachments |
| • 600 turn primary coil |
| • 300 turn secondary coil |
| • (2) empty coils for winding experiments |
| • Long solid iron core |
| • (2) short solid iron cores |
| • AC induction motor in laminated frame |
| • Coil of magnet wire for winding |
| • Levitating Thompson ring |
| • Magnetic motor rotor |
| • (2) mini compasses |
| • (2) bar magnets |
| • Alligator clips |
| • Rubber bands |
| • Winding coil contacts |
| • Aluminum Lenz' Law disc on shaft |
| • Connecting wires with banana plugs |
| • Sturdy fitted case |
| • Instructions |
Inertial Balance Kit
This is used to quantitatively determine the inertial mass of an object and is a simple way to demonstrate Newton's First Law. You can calculate the periodic motion of the balance when pushed sideways, showing that its motion is independent of the effects of gravity. Includes a frame with two platforms (one with holes) connected by two firm, horizontal spring blades. We also include a cylinder of unknown mass which is suspended by a hook and rests in a hole in the platform. Detailed instructions. You need a clamp, not included.
Insect Fumador
Also known as a fumidor, these small boxes are filled with fumigants. They are then placed in specimen boxes, drawers and display cases to protect insect collectsions from living insects. Our hard shell molded boxes will stand up to years of student and professional use. Fumigant not included. Available inspanidually or in 10 packs.
Interlabs? Basic Water Sampler
This innovative, cost-effective basic water sampler is just the ticket for budding ecologists. Intended for middle school, it features an impact resistant gray PVC bottle body of 1.75 liters and soft rubber seals. The unusual trip mechanism uses no messenger - just jerk the line sharply to close. While the trip is designed to work best in water, it?s safe on land - soft rubber seals won?t pinch fingers or cause an injury. We include 20 m of line on a foam winding float that will bob to the surface if it falls into the water. Instructions describe operation and use. Made in USA.
Interlabs? Lake Bottom Sampling Kit Class Set/12
| Here's everything your class needs to obtain samples from the bottom of a pond or lake for further study in the lab. What makes this kit unique is the reusable, durable equipment provided - no flimsy throw-aways here. The Mighty Grab (TM), for instance, needs no messenger and can be operated either by hand line or with the included sampling pole. The Wash Bucket has 504 micron mesh for sorting samples to the same standards used by the professionals. We include an armored glass thermometer of high accuracy for taking samples of air and water. Even our wide-mouth sample bottles are made of durable polypropylene and are sqaure in shape so they won't tip or spill. Kit includes: |
| ? |
| ?One (1) Plastic Wash Bucket (190-E25) for sorting out the contents with 504 micron stainless steel mesh. |
| ? |
| ?One (1) armored glass thermometer (3001-B25) from -40/+120 degrees Farenheit. |
| ? |
| ?One (1) Interlabs? Mighty Grab (TM) (78-080) for obtaining a sample in a hard or soft bottom of a pond. Features stainless steel scoops. Includes 20 m of 1/8" diameter polyester line on a colorful winding float. |
| ? |
| ?Twelve (12) 500 mL polypropylene square wash bottles (7900-E57) so that groups of students can bring their samples back to the classroom. |
| ? |
| ?Set of comprehensive teacher instructions. |
Interlabs? Mighty Grab (TM) II
| ? A scaled down version of our world-renowned grabs |
| ? For hand line operation |
| ? Center pivot closing action |
| ? Trip release needs no messenger |
| ? Included sampling pole for use in shallow water |
| Here?s a nearly indispensable tool for sampling hard and soft bottoms. (You may not want to phrase it quite that way when leading your high school?s ecology club.) Drop our light-weight sampler into your river or lake and pull up smartly on the included line when it strikes the bottom. Or, use our optional sampling pole which attaches to the trip mechanism for shallow water. |
| Features include: cast stainless steel scoops and a large, easy to handle hinge pin. The center pivot closing action avoids distorting your sample. |
| Like our other Interlabs? equipment, this little grab is no substitute for the Ekman and Ponar? grabs in many protocols. But, for introducing your students to the nature of research, there?s none so effective as the ?mighty? grab! |
Interlabs? pH Meter
| Test for pH right in the field or lab with this lightweight, waterproof, 100% buoyant pH tester. We call it electronic paper since it is far more reliable and versatile than old-fashioned pH paper. Battery operated for portability with about 250 hours of continuous use. Accurate to + 0.05 pH over 0 - 50? C.Two point calibration and auto shut-off. 163 x 40 x 26mm (6.4 x 1.6 x 1?). Ship wt: 85 g (3 oz) |
| ? |
| ? Range: 0.00 - 14 pH ? Resolution: 0.1 pH ? Accuracy: +/- 0.1 pH ? Operating Temperature: 0 - 50? C ? Calibration: 2 points ? Power supply: DC 4 x 1.5 v (button battery) |
Interlabs? Plankton Lab Kit
| Everything you need for general sorting and identification of zooplankton and phytoplankton collected in lakes, ponds, and streams. |
| Use the gridded petri dish under a binocular microscope for general identification of plankton. Use the pipettes to introduce samples into the Bogorov chamber for zooplankton identification. Gloves must be used at all times with this kit. |
| ? |
| Sampling Kit contains: |
| ?Six (6) Bogorov chambers, disposable (1810-B10) in packs of 2 |
| ?Gridded Petri dish pack of 12 |
| ?Plastic vials (7912-P50), quantity of 24 |
| ?Twelve (12) Clear plastic rulers (039030) for measuring specimens |
| ?Disposable pipettes (7905-P10), pack of 100 |
| ?Twelve (12) Insect forceps (7905-T10) |
| ?Teasing needle (7905-T25), pack of 12 |
| ?Set of comprehensive teacher instructions |
Interlabs? Plankton Sampling Kit
| This is a complete and economical kit for obtaining samples of phyto and zooplankton from lakes and ponds for later study in the lab. The apparatus we provide is durable and reusable. Our basic water bottle needs no messenger. It is constructed of PVC with soft rubber seals and 20 m of line on a styrofoam float that will bob to the surface if dropped. We provide twelve (12) 250 mL sample bottles for transporting samples back to the lab. |
| ? |
| Our plankton net is the real thing: constructed of genuine Nitex? 80 micron mesh, it has a stainless steel ring and bridle for attaching line. Included are twelve (12) small sample bottles, 125 mL in size, that fit onto the plankton net with the included adaptor. Each group of two students will take a sample, remove their bottle for transporting samples back to the lab, and pass the net to another group of two students. |
| ? |
| The secchi disk determines turbidity in shallow waters, meets industry standards, and comes with attached line on a winding float. A 5-3/4" long thermometer for taking the temperature of air and water is also included. |
| ? |
| Kit includes: ?One (1) Interlabs? secchi disk with line and float (78-010) ?One (1) -40/+120 degrees Farenheit armored thermometer (3001-B25) ?One (1) Interlabs? plankton net (78-210) 80 micron mesh, 8" in diameter, 20" long ?One (1) Interlabs? basic water bottle (78-305), 1.75 liters ?Twelve (12) 125 mL polyethylene wash bottles (7900-C27) ?Twelve (12) 250 mL polypropylene square wash bottles (7900-E57) ?One (1) 500 mL polyethylene one-piece wash bottle (7900-D57) for rinsing net ?Set of comprehensive teacher instructions |
Interlabs? Sieves
| These economical sieves are made of stainless steel mesh. These sieves may be used for geological particle sizing. They are available as a set of 6 with a lid and a catch pan, or they may be purchased inspanidually. |
| ? |
| Sieves are available in the following mesh sizes: 5 (4000 micron), 10 (2000 micron), 35 (500 micron), 60 (250 micron), 120 (125 micron) and 230 mesh (63 micron). |
Interlabs? Stream Field Kit Class Set/12
| This is a complete and economical kit for obtaining samples from flowing water for further study in the lab. The equipment provided is durable and reusable and does not require extensive training. The D-frame net is lightweight and practical, with a 30-inch handle for easy handling by students. Six (6) are provided, so several groups of students can obtain samples at once. The wide-mouthed sample jars (12) are a generous 500 mL in size for holding your sample till you get back to the lab. Constructed of durable polypropylene, they are square in shape so they won't tip or spill. Our turbidity tube is student-sized at 60 cm in length and functions like a miniature secchi disk to measure water clarity. We also provide one (1) armored glass thermometer of high accuracy for taking the relevant temperatures of air and water; and six (6) 500 mL plastic wash bottles for rinsing down equipment in the field. Kit includes: |
| ?One (1) Turbidity Tube (58-C15) of clear polycarbonate with a centimeter scale on one side and a secchi disk design, 4.5 cm in diameter, on the bottom. The secchi disk design is screwed to a rubber stopper that removes for cleaning |
| ? |
| ?One (1) armored glass thermometer (3001-B25) from -40/+120 degrees Farenheit |
| ? |
| ?Six (6) Interlabs? D-frame nets (78-125) 12"H x 11.5"W x 18" Deep |
| ? |
| ?Six (6) 500 mL polyethylene wash bottles (7900-D57) |
| ? |
| ?Twelve (12) 500 mL polypropylene square wash bottles (7900-E57) |
| ? |
| ?Set of comprehensive teacher instructions |
Investigating Energy Transfer
| Study heat and light with the simplest of materials - a black can, a silver can, and a connecting copper bar! |
| Light and heat - where would we be without them? Not alive on our wonderful earth, that is certain. But how do we use the light from the sun? How is it absorbed, reflected, heated, and conducted? These abstract concepts can be demonstrated and studied with the few simple materials in our clever kit. Measure the temperature inside a dark bottle and a shiny bright bottle to determine the different ways light and heat are absorbed and radiated. Fill both bottles with water - one with hot, one with cold - and connect them with the metal bar. Observe how the temperature of the water changes. |
| Meets National Science Educational Standards and Benchmarks for Science Literacy. |
| • Observe how surface color affects the rate of energy absorption by an object |
| • Observe how surface color affects the rate of energy radiation from an object |
| • Measure temperature change in two containers connected by a metal bar |
| • Observe how conduction affects the temperature of objects in a system |
Invisible Universe
Invisible Universe: The Electromagnetic Spectrum from Radio Waves to Gamma Rays. GEMS Teacher's Guide, Grades 6-8 Students unveil our dynamic relationship with the Sun through a space-weather mystery, a mock mission from Earth's atmosphere to outer space, ultraviolet experiments, and more. This NASA-inspired unit focuses on the impact of electromagnetic energy and solar particles on Earth. CD-ROM included. For grades 6-8.
Lab Cart, Heavy Duty
This Heavy Duty Lab Cart features three adjustable shelves. The top shelf has 2 settings, the middle shelf has 5 settings, and the bottom shelf has 3 settings to choose from. The shelf dimensions are 99cm x 55cm x 5cm. One set of wheels has built in locks for safety. The cart has a 750lb total weight capacity evenly distributed across three shelves.
This item ships unassembled.
This item ships oversize, shipping will be calculated at checkout.
Leslie's Cube
Leslie's Cube demonstrates heat absorption and radiation. The cube features four sides with different finishes:
Flat Black
Gloss Black
White
Shiny Tin
The top of the cube is fitted with a rubber stopper with a hole for the insertion of a thermometer (not included). When a lamp or other radiation source is shined onto the differing sides, students can investigate the varying properties of surface finishes by measuring the rate of heat absorption in water inside the can. They may then measure the rate at which heat is released from the cube through a given side. The thermal difference between the sides may be as great as 20 times. The cube is 4 inches on each side.
Light Measurement and Stellar Distance Kit
| Light Measurement and Stellar Distance Kit Your students can now determine the luminosity of the sun using a 200-watt light bulb. They can explore the relationship between the apparent brightness of a luminous object and the distance to the object. Using a null photometer constructed from paraffin and aluminum foil, a student can compare two light sources to determine the luminosity of — or the distance to — one of the sources. The photometer is then used to compare a 200-watt light bulb with the sun to estimate the sun’s luminosity. The kit also contains a 1-foot length of .01-inch optical fiber that, when taped to a flashlight, becomes an "artificial star." With an output of one-millionth of a watt, this small source of light is compared to a star in the sky and the distance to the star can be estimated. |
| The kit contains: 10 paraffin blocks • 10 foot-long pieces of optical fiber • 1 200-watt lamp • 1 lampholder • 20 rubber bands • 1 flashlight with batteries • 1 25’ roll of aluminium foil • 1 set of instructions & activities. |
Lightning Leaper
The path of least resistance can often lead to complications and unexpected outcomes. This is certainly true of our creatively named "Lightning Leaper". We provide an insulating plate with two binding clips on either end for connecting to a Van de Graaff generator. On the plate's surface, an incomplete metallic path-with eight small gaps-is drawn in a zig zag pattern. Anyone can see that the shortest path between the binding clips is definitely not the metallic path. Yet, the discharge from the Van de Graaff follows just this path-watch as the electricity leaps over each gap!
This plate can be suspended from an insulating stand and connected at either end to a Van de Graaff generator. For hardier souls, it can be held in the hand close to the active Van de Graaff.
For maximum "bang", try in a darkened room.
Liquid Accelerometer
| Go with the flow! Visualize horizontal acceleration - at a special low price. |
| What happens to the oceans under the full moon? What flings you outward when your car cuts a corner too sharply? |
| It's easy to visualize the effects of inertial movement with this low cost device. Horizontal acceleration creates characteristic wave patterns to demonstrate inertial movement. Now, because liquid moves in the direction opposite to acceleration, you can actually see these waves by watching the pattern created by the colored liquid. You can even measure the patterns with the imprinted horizontal and vertical grid. |
| •Demonstrate gravitational and uniform acceleration •Illustrate acceleration down an inclined plane •Use with Dynamics Cars, Rotating Platform, turntable, or amusement park physics |
| Liquid accelerometer includes: |
•Hook and loop connector to attach to a dynamics car or rotating platform |
| •Grid lines to quantify both vertical and horizontal movement |
| •Instructions |
| •You provide water and food coloring |
Living with a STAR
Living with a Star: From Sunscreen to Space Weather. GEMS Teacher's Guide, Grades 6-8 Students unveil our dynamic relationship with the Sun through a space-weather mystery, a mock mission from Earth's atmosphere to outer space, ultraviolet experiments, and more. This NASA-inspired unit focuses on the impact of electromagnetic energy and solar particles on Earth. CD-ROM included. For grades 6-8.
Magneic Field Demo, Two Halves
Three-dimensional magnetic fields are an open and shut case with our new folding magnetic field apparatus.
Magnet, Levitating Vortex
Demonstrate magnet levitation and frictional force with our two-tone device. Black and white sections allow you to measure rotation speed with a stroboscope.
Magnetic Field Viewer, 3D
Explore the mysteries of magnets in three dimensions! Iron filings mixed with oil inside an acrylic plastic cube will react in fascinating ways to a magnetic field or electric current.
Magnetic Needle
Demonstrate the action of a compass and the earth's magnetic field. Our magnetic needle, 145 mm long, has North marked in red and pivots on a sensitive brass and nylon bearing. Non-magnetic support is 9.9 cm high with 5.9 cm round base.
Metal Specimens Set
| Use this handy set to measure density after the student has determined the mass and volume of each. Consists of 4 metal cylinders, each 50 mm long and 13 mm in diameter, with precision-machined ends for accuracy of measurement. |
| • Fits in graduated cylinders • Can be used to teach measurement |
Milky Way Model
| The Milky Way model is helpful in visualizing the shape of our galaxy, and also our place within it. It shows the shape of the galaxy, the distribution of clusters of stars spiral arms, and other related celestial objects within a coordinate system. |
| The importance of this model is to provide a visual concept of the galaxy in which our Earth is located as well as to provide some information regarding other objects within it. |
| As with all of the models produced by Trippensee Planetarium Co., Trippensee’s 90 years of producing models for educators has led to a series of products which are designed to last for many, many years, and which are made to be handled and used. An instruction book, The Milky Way Galaxy Model, is included with this model. Shipping weight 5lbs. |
Mini Surber 0.25SF 6
| • Brand new - only from Science First®! |
| • Use just like a larger surber |
| • For student field work or shallow streams less than 6” |
| A surber is a type of net used to sample for specific macrobenthos in flowing water such as streams or rivers. Here’s a brand-new scaled-down surber that doesn’t scale down quality. Featuring the same stainless steel frame, 500 micron Nitex® bolt cloth net, and taffeta wings of our larger surbers, this sampler has a net 11” long and a sampling area of 1/4 square foot. While the size and price make it ideal for student studies, it is also useful for sampling small rivulets and intermittent streams. Avoid still water, fast current and streams deeper than 6”. |
Mole Box
| How to visualize what a mole of air really looks like? Use our custom-printed, die-cut cube... complete with mole! |
| Many concepts in chemistry class are hard to grasp. (Plus we all need a good laugh.) This 6-sided cardboard box, each side 11.2" square, folds into a sturdy cube. Each side is imprinted with useful facts in large type that can be read easily across a classroom. |
Mosquito Dipper
Collapsible Mosquito Dipper: This dipper has an aluminum telescoping handle with a white plastic 4.5" diameter, 2" deep bowl. With it's comfortable vinyl grip handle, it provides ease of use because it extends from 19" to 66". The dipper has pour spouts and graduations (1.5 cups, 350 mL).
Motorized Trippensee Planetarium
| The Trippensee® planetarium (EL- 400) and the motorized Trippensee® planetarium (EL- 500) are orreries that perform the same functions; the difference being that the motorized model contains a spring wire connection to the red arm which moves the planetarium arm to revolve the Earth, moon, and Venus balls around the sun. These planetariums are durable and reliable gear and ladder chain driven so that the Earth maintains it’s 23-1/2° axis, revolves around the sun and rotates on it’s axis, all at the same time. The moon revolves around the Earth and keeps it’s one face toward the Earth. Venus also revolves around the sun, and can be positioned by hand, as well, to show phases and where it is located as the morning or evening star. |
| Among the phenomena which the models show are the following: Phases of the moon Eclipses of the sun and moon Causes of night and day Seasons in various parts of the Earth Reasons for winter and summer What the solstices and equinoxes are The axis of the Earth and its relationship to the North Star About the tides and their causes The Earth’s equator, latitude, longitude and meridians |
The Trippensee models have been produced for over 90 years and provide many visual demonstrations that clarify the relationships of these elements of the solar system, in motion, for children and adults interested in learning more about the universe around them. The chain and gear drives on this model provide an exceptionally long life for the product and provide a model that is unequaled in the marketplace today. An instruction book, Elements of Astronomy and Physical Geography, is included. |
| Height: 14". Arm length: 16 1/2" Sun: 5 3/4" Earth: 3" Globe color: Light blue or black oceans (may vary from picture) |
Neodymium Magnets
These little magnets are powerful enough to attract through your arm! Use for a variety of science labs and kits. Value priced.
Item cannot ship by air.
Newtonian Demonstrator
The classic Newtonian demonstrator is designed with the utmost in Sturdiness and appearance. The wooden frame is 9" X 7" X 8" and can be seen from the back of a classroom. Five nickel plated steel balls of uniform mass are suspended from the frame. The item comes fully assembled and includes instuctions with the theory explained.
Orienteering Compass
| Orient yourself to savings! A neat compass at a neat price. |
| •Unsurpassed value in an orienteering compass |
| •Compact in size, with a lanyard |
| •Four scales |
| •Graduated in 2 degree increments |
| This basic compass is accurate enough for orienteering through terra incognita. Yet it costs only pennies, features four easy-to-read scales and fits in the palm of your hand. |
| Graduated 0 to 360 degrees (Azimuth) in 2 degree units, it has a liquid-filled capsule, declination correction scale, luminous points, and a magnifier in the base with 4x magnification. The acrylic base has scales in inches, cm, 1:25,000 and 1:50,000. Black bezel with easy-to-read print, base with red print, and lanyard. |
| Unusual for a tool in this price range, it has instructions written at a basic level. |
| Compass features: |
| •Four scales: inches, centimeters, 1:25,000 and 1:50,000 |
| •Graduated 0 to 360 degree in 2 degree units |
Original Trippensee Planetarium
| The Trippensee® planetarium (EL- 400) and the motorized Trippensee® planetarium (EL- 500) are orreries that perform the same functions; the difference being that the motorized model contains a spring wire connection to the red arm which moves the planetarium arm to revolve the Earth, moon, and Venus balls around the sun. These planetariums are durable and reliable gear and ladder chain driven so that the Earth maintains it’s 23-1/2° axis, revolves around the sun and rotates on it’s axis, all at the same time. The moon revolves around the Earth and keeps it’s one face toward the Earth. Venus also revolves around the sun, and can be positioned by hand, as well, to show phases and where it is located as the morning or evening star. |
| Among the phenomena which the models show are the following: Phases of the moon Eclipses of the sun and moon Causes of night and day Seasons in various parts of the Earth Reasons for winter and summer What the solstices and equinoxes are The axis of the Earth and its relationship to the North Star About the tides and their causes The Earth’s equator, latitude, longitude and meridians |
| The Trippensee models have been produced for over 90 years and provide many visual demonstrations that clarify the relationships of these elements of the solar system, in motion, for children and adults interested in learning more about the universe around them. The chain and gear drives on this model provide an exceptionally long life for the product and provide a model that is unequaled in the marketplace today. An instruction book, Elements of Astronomy and Physical Geography, is included. |
| Height: 14" Arm length: 16 1/2" Sun: 5 3/4" Earth: 3" Globe color: Light blue or black oceans (may vary from picture) |
| EL-401 requires 12 volt DC power supply |
Plastic Spectrometer
| Plastic Spectrometer Hailed as "one of the very best, affordable scientific instruments" by the Astronomical Society Pacific, the Project STAR spectrometer is made of high-impact plastic for years of classroom service and comes completely assembled. The spectrometer uses high-dispersion, high-efficiency diffraction grating that produces an easily-read bright spectrum. Includes a reference label for bright spectral lines and a scale labeled in both electron volts and nanometers for chemistry and physics instruction. Also includes a 10-page activity booklet. The activities include: Observing what diffraction grating does |
| • identifying various light sources • identifying elements in flame spectra, solar spectra and street lights including mercury, sodium, hydrogen and neon. |
Pressure Paradox Kit
What weighs more, a large styrofoam ball or a small heavy steel ball? The light styrofoam ball -- of course... or does it? Show how the sense of touch changes how we feel pressure. Great intro into density. Contains large ball, small ball, theory.
Probe Caps
Prevent spillage and accidents in the laboratory by using these handy plastic probe caps. Our set of four caps fits most 100 - 1,000 mL beakers. The holes present in the caps allow for several measuring probes and/or thermometers to stand safely and securely in beakers.
Beakers and thermometers not included
Project STAR Teacher's Sampler
| Project STAR Teacher’s Sampler If you have never seen any of these materials and are curious about them, this sampler of Project STAR materials and activities was created for you. The sampler includes (one of each): Do-It-Yourself Star Finder Kit |
| • Celestial Sphere Kit • Sun Tracking Hemisphere Kit • 3-D Constellation Kit • Spectrometer Kit (cardboard or plastic) • Refracting Telescope Kit (with tubes) • Light Measurement and Stellar Distance Kit • Holographic Diffraction Grating — mounted, 35mm glass slide • Where We Are in Space and Time Activity Book. |
Radiation Can Set
| Not all colors are created equal. Investigate how color can influence absorbing and radiating energy. |
• Observe how surface color affects rate of energy absorption by an object |
| • Observe how surface color affects rate of energy radiation from an object |
| Light and heat - where would we be without them? Not alive on our wonderful earth, that's for certain. We've all seen pictures of the Earth's surface taken from an airplane that show the many types of features - water, ice, rocks, sand, soil and plants - that cover its surface. But do all these objects absorb incoming solar radiation equally? Once heated by the sun, do they all give off heat energy equally? |
| Find out with these two differently colored cans in our low-cost Radiation Can Kit. All you'll need are thermometers and a lamp to provide a source of heat. |
| How to use: Exploring radiation and absorption. 1. Place black and silver containers near each other with thermometers inserted in each. 2. Angle a lamp so the light points directly at the sides of both containers. 3. Read off temperatures of each, with the light on, then off. Observe and record 10 minutes. |
Raymond Thermal Expansion Demonstrator
| Here's a new twist on the "Ball and Ring" that proves that metal expands when heated. |
| •Why does the rod fit in the gauge at room temperature, but not when heated? |
| •Demonstrate the linear and spherical expansion of metal when it is heated. |
| Why do bridges need expansion joints? Why are small gaps left between metal sleepers on railway tracks? Why are airplanes designed so that they can expand without breaking? The "Ball and Ring" demonstration has been around awhile and attempts to answer these questions. The ball fits through the ring until it is heated and expands just enough to become too big. But just when you thought this experiment was old hat, we've developed a new twist. Since it was invented by our late owner, engineer Ray Bell, we'd like to call it the "Bell" and Ring - but we don't dare. This precision-machined thermal expansion demonstration is literally "two for one." It demonstrates both linear and spherical expansion, unlike the traditional "Ball and Ring." It consists of two pieces, both with wooden handles for safety. The first is a rod that is 7.5 cm long and 1 cm in diameter. The other is a gauge with a precision-machined 7.5 cm slot with two holes about 1 cm in diameter. (But in this case, the "about" is critical. Perform the demonstration to find out why.) |
| How it works: At room temperature, the rod fits snugly inside the slot and either end fits into either hole in the gauge. Now heat the rod with a propane torch. The metal - as do most materials - expands when heated. The rod no longer fits in the slot. It does fit in one of the holes but does not fit in the other, which gives a good inkling of how infinitessimally small the thermal expansion can be while still wreaking havoc with civil engineering projects. |
Refracting Telescope Kit
| Refracting Telescope Kit Experiment with each element of a simple 16-power refracting telescope and see how the lenses work when put together without using an optical bench. Galileo’s first telescopes lacked precision and clarity. Nevertheless, he made astonishing discoveries with his crude instruments. This simple lab enables students to build a telescope that is similar to Galileo’s. Use the telescope and see how it is similar to a pinhole camera |
| • view inverted astronomical images • estimate the magnification power • find the focal length of a lens • see how the moon looked to Galileo. The Kit includes (10 of each unless noted): inner and outer tubes • plastic lenses (43mm diameter, objective, 400mm focal length) • plastic lenses (17.5mm diameter, 25mm focal length) • foam holders, cardboard spacers and washers for the eyepiece lenses • red plastic caps • 1 set of instructions & activities. |
Rotating Candle Apparatus
A great way to understand centripetal force and centrifugal force. Why do the flames turn in instead of out when spun on the rotator?
