Seven different solutions are combined in every possible combination and chemical properties are identified by observing their reaction with other solutions. Chemical reactions include gas production, color changes and formation of recipitates. Students use their information to identify 4 unknown solutions. Contains materials to conduct the experiment twice, safety glasses. For 24 students working in groups of 4. Grades 7-11.
Soft vinyl frame with four plastic ventilators for maximum indirect ventilation. Rubber headband for more comfort! Meets Z87.1 ANSI Standards and OSHA requirements.
Set includes 6 stages of development in separate jars. . .3 day, 4 day, 6 day, 12 day, 15 day and hatching stage.
Sized just right for grade school aged children ages 5 to 9! Two vertical 1 3/8" prismatic reflective stripes on front and back. Hook and loop front closure. Elastic sides. Lime with orange reflective. Made in the USA.
Tired of hunting through your capes looking for the right one for your event? Now you can use one cape for any event! This youth size cape is blue with red trim and has a clear pocket on the front where you can insert a 5"W x 3.75"H sign - Perfect for Index cards. Sized for ages 6-10 / Grades K-3. 12"W x 15.5"L with 4.25" Elastic on the sides.
• Front and back of the vest is 12 inches across from side to side
• Measures 31 inches from bottom hem on the front across the shoulders to bottom hem on the back
• High quality N-series mesh.
• 3M Scotchlite reflective material high intensity tape.
• Hook and loop front closure
• Elastic sides
• Two 1 ½” horizontal stripes front and back
• Black binding around the edges
• Made in the USA
• Available in 4 sizes
High quality lime N-series mesh. 3M Scotchlite reflective material high intensity tape. Hook and loop front closure. Elastic sides. Two 1 1/2" horizontal stripes front and back. Black binding around the edges. Made in the USA. Available in 4 sizes.
• High quality N-series mesh.
• 3M Scotchlite reflective material high intensity tape.
• Hook and loop front closure
• Elastic sides
• Two 1 ½” horizontal stripes front and back
• Black binding around the edges
• Made in the USA
• Available in 4 sizes
High quality orange N-series mesh. 3M Scotchlite reflective material high intensity tape. Hook and loop front closure. Elastic sides. Two 1 1/2" horizontal stripes front and back. Black binding around the edges. Made in the USA. Available in 4 sizes.
In Chromatography, viewers learn a valuable technique for the rapid separation of chemical mixtures. After the scientific principles of paper chromatography are conveyed through real-life demonstrations and clear graphics, students move into the lab to analyze a number of ink samples, calculating Rf values for the pigments found in each sample. Students investigate the experimental techniques used to determine if two samples are identical by creating a unique visual "fingerprint" of each tested substance. They also explore the factors affecting each separation and extend the investigation by choosing different solvents for the mobile phase. See how gas chromatography is used in arson investigations and how thin-layer chromatography can be utilized to confirm a document's authenticity. Part of the multivolume Science Lab Investigations! DVD Series. Includes a Teacher's Guide.
In Chromatography, viewers learn a valuable technique for the rapid separation of chemical mixtures. After the scientific principles of paper chromatography are conveyed through real-life demonstrations and clear graphics, students move into the lab to analyze a number of ink samples, calculating Rf values for the pigments found in each sample. Students investigate the experimental techniques used to determine if two samples are identical by creating a unique visual "fingerprint" of each tested substance. They also explore the factors affecting each separation and extend the investigation by choosing different solvents for the mobile phase. See how gas chromatography is used in arson investigations and how thin-layer chromatography can be utilized to confirm a document's authenticity. Part of the multivolume Science Lab Investigations! DVD Series. Includes a Teacher's Guide.
Students will enjoy connecting batteries, wires and bulbs in various combinations to try to make bulbs light. Snap-on wire clips enable students to make connections between the batteries and bulbs quickly. A chart of various arrangements for connecting the batteries and bulbs is provided. The student studies the chart, predicts which arrangement will light the bulb and which will not, then connects the real batteries and bulbs (following the diagrams) to prove or disprove original predictions. Purchase size "D" batteries separately.
Aluminum with 1/2" steel thumbscrews. Swivels and locks to any angle. For rods up to 5/8" diameter.
Aluminum with 1/2" steel thumbscrews. Swivels and locks to any angle. For rods up to 5/8" diameter.
Introduce your students to the Five Kingdoms through the process of classification. Students view illustrations of various life forms and use a simple, dichotomous key to determine the appropriate kingdom and phylum of each. In the process, they'll gather valuable summary information regarding what each life form "does for a living!" Grades 6-12.
This collection includes examples of silicates, oxides, sulfates, phosphates and other major mineral groups as classified in Dana's Textbook of Mineralogy. 50 specimens approximately 1" x 1", number-coded in compartmented tray. Grades 6-12. Ages 11-18.
This collection includes examples of silicates, oxides, sulfates, phosphates and other major mineral groups as classified in Dana's Textbook of Mineralogy. 50 specimens approximately 1" x 1", number-coded in compartmented tray. Grades 6-12. Ages 11-18.
Contents:
• 10 Magnet Wands
• 10 Plastic-Encased Button Magnets
• 15 Magnet Rings
• 50 Magnet Marbles
• 1 Alnico Bar Magnet
• 200 Metal-Rimmed Counting Chips
• 100 Paperclips
• 5 Pencils
• 1 Teacher's Guide
Compare and contrast different magnets (by size, shape & strength). Explore attraction & repulsion. Investigate a magnet’s force through solids & liquids. Learn magnetism vocabulary. Each kit contains materials for a work group of five students, plus easy-to-use educational guides. Kit contains 10 magnet wands, 5 button magnets, 50 magnetic marbles, 15 ring magnets,10 disc magnets, 200 magnetic counting chips,100 colorful paperclips, 5 pencils, demo bar magnet, and Teacher's guide. Ages 4-7.
• Deluxe set includes everything needed to teach liquid measurement and equivalencies
• Students will recognize, measure and estimate liquid volumes
• Set includes 5 Measuring Jars, 3 Liquid Measurers, 5 Measuring Cups, and 6 Measuring Spoons
• All pieces are clearly marked and made of durable plastic
• Ages 5+
This deluxe set is the perfect sized classroom set for learning measurement equivalents. Students practice customary capacities, liquid measurement and metric conversions with suggested activities included. Made of durable plastic, each piece is clearly marked to provide years of use. Includes teacher's guide. Set includes a liquid measuring cup (8oz/250ml), pint (16oz/500ml), quart (32oz/1000ml), standard spoons, 1 teaspoon,1 tablespoon, standard cups, measuring jars with gill, pint, quart, half-gallon, gallon (metric 100ml-3000ml)
Kit contains 15 sterilized, wrapped warn owl pellets; 1 owl pellet Teacher's guide; 1 bone-sorting poster; 1 vole skeleton poster and 1 food web poster.
Observe the use of microbes for oil degradation. Model various spill scenarios and monitor the effectiveness of the provided freeze-dried oil-degrading microbe mixture in remediating the waste. Set up a simulated oil spill in water and treat it with the special microbial product to observe the physical changes degradation of oil film over time. Additionally, they simulate three spill scenarios on beach sand, gravel and cobbles in order to observe the difference in degradation rates. The class also explores bioremediation methods for other waste chemicals and compares their effectiveness to traditional clean-up methods. Grades 7-10.
Ingenious, easy-filling models prove different geometric shapes hold the same volume. The set includes six clear plastic solids: cone, sphere, cylinder, cube, pyramid and rectangular prism. Grades 3+.
U.S. and Metric scale, 6" and 150mm. Graphics may vary.
Superior, all purpose laboratory tubing. Flexible transparent, PVC.
This program looks at the wide range of climates in North America and around the world, and examines how factors such as the sun, wind, temperature, precipitation and position of Earth determine the weather for a particular region. Live footage, vivid graphics and a hands-on experiment help to clearly illustrate these concepts. One of six volumes in the Weather Fundamentals DVD Series in the Schlessinger Science Library. Part of the Schlessinger Science Library in Action Collection. This title correlates to the National Science Education Standards for Earth and Space Science -- structure of Earth's system, Earth's history and Earth in the solar system. A Teacher's Guide is included and available online that features additional information on the topic, vocabulary words, discussion questions, follow-up activities and lists of recommended books and Internet resources. 23 minutes. Grades 4 to 7.
3-D model promotes basic understanding of cloud types in the classroom or outdoors, plus science and math skills. Removable labels let students identify cloud structures and altitudes on 24"W x 18"H model. Includes 3-ring binder with glossary, key, blackline master, and a full-color overhead transparency. Grades 5-12.
Cobalt chloride crystals are commonly used in classrooms for chemistry experiments and demonstrations, primarily to study chemical properties and investigate reactions involving moisture and hydration. The most notable uses include:
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Indicator for Humidity and Hydration: Cobalt chloride is a popular indicator for moisture because it changes color based on its hydration state. In its anhydrous form, cobalt chloride is blue, and it turns pink when it absorbs water. This property makes it ideal for demonstrating reversible chemical changes and teaching about hydration and dehydration reactions.
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Le Chatelier’s Principle Demonstrations: Cobalt chloride can be used to illustrate Le Chatelier's Principle. By adding water or applying heat to the crystal, students can observe the reversible color change, demonstrating shifts in equilibrium due to changes in temperature or the presence of a reactant.
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Testing for Water Presence: Cobalt chloride paper, which is made using the crystals, is used in chemistry and environmental science labs to detect water vapor in various gases or liquids.
Due to its potential toxicity and the fact that it can cause skin irritation, cobalt chloride should be handled with proper safety measures, including wearing gloves and protective eyewear.
Specifically designed to dramatically and vividly show the classroom a pollutant in water, this kit is designed to permit students the opportunity of determining the presence of animal waste by seeing a dramatic color change that occurs in a lactose broth, students can determine if E coli are present. Grades 7-12.