DNA Model Refill, Single Packet - Build a segment of the DNA consisting of Adenine, Thymine, Cytosine, and Guanine. Color-coded pieces designate certain molecules making up the four nucleotides present in DNA. Instructions.
They can start with basic math operations and work their way up to more advanced concepts such as percents and square roots. This dual-powered, four-function calculator includes auto shut-off, 3-key memory and more. Measures 4 1/2" x 2 1/2" Grades Pre K +
The Iron Electrodes can be used for voltaic cells, electrolysis experiments, fruit batteries, etc.
This fluorescent white armband provides high visibility day or night, has sonic wedged edges, and is water resistant. Imprinted with "Crossing Guard" in black.
• Build a working crystal radio that will pick up radio stations
• Experiment with radio waves while learning chemistry basics.
• No batteries or soldering are needed.
• Includes: 1 diode, 1 base, four rubber bands, 1 tuning rod, 2 connecting wires, 1 coil wire, 1 sand paper, 1 earphone, three nuts, three bolts, four washers, 1 coil tube, 1 tuning ball and 1 instruction manual.
• Meets or exceeds ASTM F 963.
• Recommended for children ages 8 and up.
Kids can build a working crystal radio that will pick up radio stations and allow them to experiment with radio waves while learning chemistry basics. No batteries or soldering are needed. This package contains: 1 diode, 1 base, four rubber bands, 1 tuning rod, 2 connecting wires, 1 coil wire, 1 sand paper, 1 earphone, three nuts, three bolts, four washers, 1 coil tube, 1 tuning ball and 1 instruction manual. Meets or exceeds ASTM F 963. Recommended for children ages 8 and up. WARNING: CHOKING HAZARD-Small parts. Not for children under 3 years.
For use with 15297, 04235 and 98388 landform models. Set of 10 lab investigations workbooks includes 20 pages of activities involving students in locating and identifying features on the models, observing, speculating and recording the practical influence of geography upon economic and social activities of man.
A lavishly illustrated guide to setting up, maintaining, understanding, and enjoying an aquarium for tropical fish and other animals. Including:
- Selecting the aquarium
- Lights, temperature, and decorations
- Feeding your fish and keeping them healthy
The fish and other organisms described and illustrated have been selected on the basis of their availability, beauty, and general interest.
Explains the use of binoculars and telescopes and how to locate objects in the sky.
Borosilicate glass. Uniform thickness.
This is a standard borosilicate glass funnel with uniform thickness. The top outer diameter measures 74mm and the stem measures 70mm. Glass funnels are mostly inert and make it easier to pour without making a mess.
Heavy stock horseshoe magnet with keeper.
5 inch strong zink-plated steel horseshoemagnet with North and South poles marked. Supplied with keeper.
Sloping front meters for easy reading. +/- 2.5% accuracy with overload protector and color-coded bar. 4"W x 5.5"D x 3.5" H. External zero adjustment.
This guide to the snakes, frogs, turtles, and salamanders of North America aids in the identification of 212 species. Learn:
- How to tell the difference between reptiles and amphibians
- How and where to find them
- How to separate fact from fable
Reptiles and Amphibians includes full-color illustrations, up-to-date range maps, and a host of fascinating facts about these interesting and unusual animals.
Using clear text and detailed illustrations, Golden Guides from St. Martin's Press present accurate information in a handy format for the beginner to the expert. These guides focus on what your students are really going to see. They are easy to use: detailed, full-color illustrations, text, and maps are all in one place. They are easy to understand: accurate, accessible information is simplified without being misrepresented. They are authoritative, containing up-to-date information written experts and checked by specialists. And they are portable: handy and lightweight, designed to fit in a pocket and be carried anywhere.
3" wide bright orange armband constructed of nylon reinforced vinyl with elastic straps to enable the band to fit arms 13" in circumference or larger.
• For 70 years, made in the U.S.A. with over 300 million sold worldwide
• Stretches like an accordion, bounces and walks down steps
• Made of metal for long lasting wiggly jiggly fun
• Comes boxed and perfect for presents, party favors, Easter baskets, grab bags, prizes and stocking stuffers
• Recommended for children 5 years of age and older
For 70 years, made in the U.S.A. with over 300 million sold worldwide. Stretches like an accordion, bounces and walks down steps. Made of metal for long lasting wiggly jiggly fun. Comes boxed and perfect for presents, party favors, Easter baskets, grab bags, prizes and stocking stuffers. Recommended for children 5 years of age and older
Just attach a discarded plastic soda bottle to each end of the Tornado Tube, one with water, one empty. Stand the empty bottle on a flat surface, as the water begins to flow down from the full bottle, a vortex will descend from the top with an amazing similarity to a tornado. Bottles not included.
Economical, great for students. Consists of two 3 inch Diameter rubber suction cups. No vacuum pump needed. To demonstrate Atmospheric Pressure.
Economical, great for students. Consists of two 3 inch Diameter rubber suction cups. No vacuum pump needed. To demonstrate Atmospheric Pressure.
Neodymium (NdFeB) is the most powerful magnet material in the world. Neodymium is classified as an element in the lanthanides section of the Periodic Table. These are the super strong magnets you have heard about that can attract through your hand.
Neodymium (NdFeB) is the most powerful magnet material in the world. Neodymium is classified as an element in the lanthanides section of the Periodic Table. These are the super strong magnets you have heard about that can attract through your hand.
Strong Alnico 1 Cylindrical Magnets, shipped in pairs, with separators and keepers. North pole marked with a dot.
Support for bar magnets or friction rods. Allows magnets or friction rods to hang freely and turn in a horizontal plane. Hooks are 89 mm apart. Dimensions 3.5" x 2"x1". Shipping weight 10 grams.
Experiment with magnetism, create fun games, and amaze your friends. Magically dangle a chain of marbles from the wand, make the marbles dance without touching them, and more. Includes 1 magnet wand (7.63 inches long) in assorted solid colors and 5 bicolor magnet marbles (.63 inches in diameter). Ceramic magnets are completely encased in plastic. Ceramic magnets are the most lightweight and economical magnets. Children safety tested for ages 4+.
4 inch strong zink-plated steel horseshoemagnet with North and South poles marked. Supplied with keeper.
Clear acrylic trapezoid. With one flat surface frosted to enhance visibility. Bases are 89mm and 40mm. Faces measure 47mm and 35mm.
Clear acrylic trapezoid. With one flat surface frosted to enhance visibility. Bases are 89mm and 40mm. Faces measure 47mm and 35mm.
Made from clear acrylic. One plane surface is frosted. 89mm long. 15mm thick. 25mm across the beam axis.
Made from clear acrylic. One plane surface is frosted. 89mm long. 15mm thick. 25mm across the beam axis.