Students explore North America's mineral and rock resources and how man uses them all. Mounted natural specimens and corresponding man made products (i.e. gypsum and wallboard, bauxite and aluminum) are placed on a map of North America. 18"x24" in wood frame. Grades 6-12.
The relationship between resources that are renewable in one human life span and the associated products are clearly illustrated on this visually appealing chart. Students will be enticed to investigate the worldwide resources for materials they use every day. This chart complements the Investigating Non-Resources chart. Representative natural materials and the corresponding everyday products are mounted on a sturdy, wood framed 18"x 24" image. Grades 6-12.
Wood framed reference chart, complete with mounted specimens. The evidence supporting the theory of Plate Tectonics is shown on this chart. Rock specimens that illustrate the variety of processes related to the Earth's dynamic crust are mounted on this 18" X 24" chart. Grades: 4 - 12.
Ideal field test kit for performing 4 important experiments on water pollution. Test water samples for dissolved oxygen content, chlorides, phosphates, and water hardness. This kit provides all the apparatus and materials necessary for performing each test several times. Comes complete with instruction booklet.
Find out what pollutes drinking water and how it can be made safe again following pollution. Conduct experiments on the chemicals and organisms that make water unsafe to drink and conduct an experiment on its purification. Learn the causes and effects of water pollution.
Zinc sulfate, lab grade, granular is commonly used in classroom settings for chemistry experiments and to illustrate various scientific concepts due to its solubility and reactivity. Some of the typical applications include:
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Precipitation Reactions: Zinc sulfate is used to demonstrate precipitation reactions when mixed with other compounds. For example, when combined with sodium carbonate, it forms zinc carbonate, a white precipitate. This can be used to illustrate the principles of solubility, ionic reactions, and compound formation.
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Galvanic Cells and Electrochemistry: Zinc sulfate is frequently used in electrochemical cells (such as Daniell cells) to study the behavior of zinc as an electrode and to teach concepts of oxidation and reduction, electrode potentials, and electron flow in galvanic cells.
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Testing for Anions: It can be used as a reagent in testing for the presence of specific anions in solutions. For instance, in analytical chemistry, zinc sulfate might be utilized in qualitative tests to help identify sulfide ions through the formation of a white precipitate (zinc sulfide).
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Growth Medium for Biological Studies: In biology and environmental science classes, zinc sulfate is sometimes used as a trace element in preparing growth media for certain plants or algae to study the effects of zinc on growth and development.
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Illustrating Properties of Transition Metals: Zinc is often grouped with other transition metals to compare chemical properties, such as reactivity with acids and the formation of complex ions in solution.
Safety precautions should be observed when handling zinc sulfate, as it can be harmful if ingested or inhaled in powder form. Proper protective equipment, such as gloves and safety goggles, is recommended during use.
Cupric sulfate (copper(II) sulfate) reagent fine crystals are widely used in classrooms for chemistry experiments and demonstrations, primarily due to their distinct blue color and diverse chemical properties. Common educational uses include:
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Chemical Reactions and Color Changes: Cupric sulfate is often used in experiments to demonstrate various chemical reactions, such as double displacement reactions and redox reactions. For example, when zinc metal is placed in a solution of cupric sulfate, a redox reaction occurs, producing copper metal and zinc sulfate.
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Electrolysis and Electroplating: Cupric sulfate is commonly used in electrochemistry experiments to demonstrate the principles of electrolysis. Students can use it to deposit a layer of copper on a metal object, illustrating the concept of metal plating.
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Crystallization and Hydration Studies: Cupric sulfate crystals are ideal for studying crystallization and hydration. In its hydrated form (CuSO₄•5H₂O), it is a vibrant blue, but it turns white upon heating when it loses its water molecules. This change is used to teach about the effects of hydration and dehydration on compounds.
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Identifying Presence of Water: Cupric sulfate can also be used as a qualitative test for water. The blue hydrated form turns white when heated (as it becomes anhydrous), and when a drop of water is added to the anhydrous form, it turns blue again. This makes it an excellent tool for illustrating reversible hydration reactions.
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Demonstrating Copper Ion Properties: The distinct blue color of cupric sulfate is due to the presence of copper(II) ions in solution. It is often used to teach students about the behavior of transition metals and their unique colors in aqueous solutions.
Cupric sulfate should be handled carefully, as it is toxic if ingested and can cause irritation to skin and eyes. Proper safety equipment, including gloves and goggles, should be used during experiments.
500 grams of Aluminum Metal Shot.
Aluminum metal shot is often used in classrooms for chemistry experiments and demonstrations, such as studying chemical reactions, investigating metal properties, and exploring concepts like density and reactivity. It is commonly used in reaction experiments with acids (like hydrochloric acid) to produce hydrogen gas, allowing students to observe the properties of metal reactivity and gas evolution. Additionally, aluminum shot can be used in physics experiments to study thermal conductivity and heat transfer due to its high thermal conductivity and low density.
Zinc metal, foil 0.010" x 12" x 36", (1 piece = 500g) - 500g
Zinc metal, foil 0.010" x 12" x 36", (1 piece = 500g) - 500g
This Economy Celestial Globe can be a low-cost alternative to our other Celestial Globes. It measures 8" in diameter and illustrates many of the same astronomical concepts as the larger versions. The Globe can be disassembled for easier storage. Constellations, right ascension and declination lines, and the ecliptic cover the Globe. A movable Earth and Sun complete the kit. A Teacher's Guide with assembly instructions and activities is included.
This Economy Celestial Globe can be a low-cost alternative to our other Celestial Globes. It measures 8" in diameter and illustrates many of the same astronomical concepts as the larger versions. The Globe can be disassembled for easier storage. Constellations, right ascension and declination lines, and the ecliptic cover the Globe. A movable Earth and Sun complete the kit. A Teacher's Guide with assembly instructions and activities is included.
Approved by the Federal Highway Administration (FHWA) and The American Association of State Highway and Transportation Officials (AASHTO). They comply with the mechanical requirements for grade 60 steel of ASTM A499 and the chemical requirements for grade 1080 steel of ASTM A576. Features a ribbed back and flange for extra strength. Manufactured from the finest high-carbon new billet steel (grade SP-80), which is more reliable than conventional posts made of old rail steel. Available in 3 lengths.
Sign meets the Manual on Uniform Traffic Control Devices (MUTCD) specifications for shape, color, dimensions, legends, illumination and reflectorization set forth by the Office of Traffic Operations, Federal Highway Administration, U.S. Department of Transportation. Sign includes 3M Scotchlite Reflective Yellow Green Sheeting which is designed to reflect headlights at night and make signs visible to drivers. This provides enhanced visibility and safety. 24" x 8" (Yellow/Green).
Sign meets the Manual on Uniform Traffic Control Devices (MUTCD) specifications for shape, color, dimensions, legends, illumination and reflectorization set forth by the Office of Traffic Operations, Federal Highway Administration, U.S. Department of Transportation. Sign includes 3M Scotchlite Reflective Yellow Green Sheeting which is designed to reflect headlights at night and make signs visible to drivers. This provides enhanced visibility and safety. 24" x 10" (Yellow/Green).
Sign meets the Manual on Uniform Traffic Control Devices (MUTCD) specifications for shape, color, dimensions, legend and illuminationn set forth by the Office of Traffic Operations, Federal Highway Administration, U.S. Department of Transportation. 18" x 24" (White/Black).
Sign meets the Manual on Uniform Traffic Control Devices (MUTCD) specifications for shape, color, dimensions, legend and illuminationn set forth by the Office of Traffic Operations, Federal Highway Administration, U.S. Department of Transportation. 18" x 24" (White/Black).
Sign meets the Manual on Uniform Traffic Control Devices (MUTCD) specifications for shape, color, dimensions, legend and illuminationn set forth by the Office of Traffic Operations, Federal Highway Administration, U.S. Department of Transportation. 18" x 24" (White/Black).
Sign meets the Manual on Uniform Traffic Control Devices (MUTCD) specifications for shape, color, dimensions, legend and illuminationn set forth by the Office of Traffic Operations, Federal Highway Administration, U.S. Department of Transportation. 18" x 24" (Yellow).
Sign meets the Manual on Uniform Traffic Control Devices (MUTCD) specifications for shape, color, dimensions, legend and illuminationn set forth by the Office of Traffic Operations, Federal Highway Administration, U.S. Department of Transportation. 18" x 24" (Yellow).
Sign meets the Manual on Uniform Traffic Control Devices (MUTCD) specifications for shape, color, dimensions, legend and illuminationn set forth by the Office of Traffic Operations, Federal Highway Administration, U.S. Department of Transportation. 18" x 24" (Yellow).
This durable traffic sign is constructed of baked enamel nonrusting heavy gauge aluminum and is designed to provide many years of outdoor use. Has 3M Scotchlite reflective sheeting for high visibility day or night. Sign measure 18" x 18".
• Durable herringbone weave design
• Rubberized fabric-tire links
• Ideal for schools, industrial or factory entrances
• Easily rolled for cleaning
• Overall thickness: 5/8"
• Available in black only
• Available in 6 Sizes
This 17in x 25in interlocking linked mat utilizes fabric impregnated rubber secured with 12 gauge galvanized spring steel rods. Dirt falls between herringbone pattern for easy cleaning-simply roll up mat and sweep or hose the floor underneath. Overall thickness, 5/8" Available in black only. Available in six size. Ships UPS or FedEx Ground.
A unique hands-on science teaching aid that is visually exciting to students. Students are able to watch what they see and read in a science book happen right before their eyes. The Teaching Tank is approximately 12" x 12" x 1/2" and can be easily dismantled and cleaned with mild soap and water.
Flex-i-Cold stays flexible up to -4 degrees Fahrenheit and will conform to the body. This non-toxic gel is encased in a puncture-resistant bag for multiple uses. You can heat this pack in the microwave or boiling water for use as a heat pack. Always follow label instructions for safe use. Packs remain flexible out of the freezer for an extended period of time. Non-toxic and non-caustic, bio-degradable - simply keep in freezer until needed. Available in 2 sizes, and sold in cases of 12.
Watch caterpillars change into butterflies right before your eyes with our award-winning Butterfly Garden! We've completely redesigned this classic educational wonder after 33 years on the market. Raise 5 Painted Lady butterflies while learning all about metamorphosis. See the caterpillar's transition as it matures, changes into a chrysalis, and finally emerges as a Painted Lady butterfly! Absolutely safe to release into the environment. Includes colorful habitat, certificate for 5 butterfly larvae with special food, and complete instructions. Three butterflies are guaranteed to be perfect specimens. Please allow approximately 3 weeks for your larvae to develop. Available only in the Continental U.S. and Alaska. Ages 4 and up. 10" X 10".