Sodium silicate (water glass) is a clear, colorless liquid. Used in soaps, detergents, adhesives and in waterproofing. Sometimes used to seal small cracks or leaks in the cooling system.
Sodium chloride, lab grade, crystal - 500g
Limewater solution is commonly used for testing the presence of carbon dioxide in gaseous samples in school laboratories, and refining of sugar in a process called carbonatation. 1 liter.
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.
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 +
Easy wind-up tapes are marked in inches and feet on one side and mm and cm on the other. Durable casing for years of use.
1 blue vial and 1 red vial (100 strips per vial).
1-14 Paper strips, change for each full pH unit,100 strips per vial.
An economy collection of 6 commonly known igneous rocks. Igneous rocks are formed by the cooling of molten rock, either magma or lava. Each generous specimen is 1 1/4" to 1 1/5" and is contained in a resealable zip lock bag with a label. Grades 5-12. Ages 10-18.
This concise introduction to the life of the past as revealed through fossils, is an invaluable and enjoyable guide which includes:
• Descriptions of the typical plants and animals of major geological eras
• Maps showing where fossils can be found
• The history of the development of life on earth
• Full-color illustrations
Life of the past as revealed through fossils. 481 illustrations.
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.
Pith balls react sensitively to static charges like those from a charged friction rod or a Van de Graaff generator.
Pith balls react sensitively to static charges like those from a charged friction rod or a Van de Graaff generator.
Pith balls react sensitively to static charges like those from a charged friction rod or a Van de Graaff generator.
The Iron Electrodes can be used for voltaic cells, electrolysis experiments, fruit batteries, etc.
All you need is water, a little sunshine and imagination for hours of fun making photographic type prints, available in 2 sizes. 4" x 4", 10 sheets, 1 acrylic plate and instructions in a lightproof envelope.
Contains 4" x 4" sheets of sunprint paper and an acrylic overlay. This acrylic overlay helps press objects such as leaves flat in contact with the paper to insure a good print.
Developed by educators at the Lawrence Hall of Science, Sunprints encourage an interest in the photographic process using only sun, water, and a bit of imagination.
Place a leaf, flower, or other object on the special paper and set it in the sun briefly.
Then rinse the paper in water and watch as a beautiful long-lasting image appears.
Made from plate glass about 1/16" thick. Highly Silvered back.
This 3in x 1in mirror is made from plate glass about 1/16in thick with a highly silvered back.
Made from plate glass about 1/16" thick. Highly Silvered back.
This 4in x 2in mirror is made from plate glass about 1/16in thick with a highly silvered back.
Made from plate glass about 1/16" thick. Highly Silvered back.
This 4in x 4in mirror is made from plate glass about 1/16in thick with a highly silvered back.
Made from plate glass about 1/16" thick. Highly Silvered back.
This 6in x 2in mirror is made from plate glass about 1/16in thick with a highly silvered back.
Made from plate glass about 1/16" thick. Highly Silvered back.
This 6in x 4in mirror is made from plate glass about 1/16in thick with a highly silvered back.