Visualize the potential contamination of groundwater. Construct mini-groundwater simulation models showing the movement of a simulated, colored pollutant. Determine under what conditions contamination occurs from a variety of sources such as spill, farms, and buried tanks and how polluted groundwater eventually reaches the drinking water supply. In the process, students learn about the water cycle, water quality, ppm and ppb pollutant contamination, porosity of soils, and other related concepts. Grades 6-10.
Introduction to elements, compounds, and mixtures, along with changes that these substances undergo as well as the characteristics of some elements, symbols for elements, and structures that make up atoms. Common mixtures are separated by evaporation and chromatography . New compounds are formed and changes that indicate chemical reactions are observed. Reproducible manual that includes 10 activities/laboratories, vocabulary lists and definitions, and a complete answer key. Experiments include: Classes of Matter, Elements, Symbols for Elements, Atoms, Common Mixtures, Separation by Evaporation, Separation by Chromatography, and more. 24 Students in Groups. Materials needed but NOT included: goggles, tape. Grades 4-9.
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.
Observe the color and state of matter for 14 different substances. Test liquids for the presence of odor and observe the texture of solids. Test the acidity or alkalinity of liquids. Test the solubility of solids in alcohol and water. All materials included except: water, stirring rod, graduated cylinder, balance, hand lens (optional), safety glasses, test tubes or depression plate for solubility test. Designed for 24 students in groups of 4. Grades 8-11.
Refill kit for 09725. Barium Chloride bottle 100ml, Citric Acid 1/4 oz, Dextrose 30cc, Gelatin 30cc, Hydrogen Peroxide 3% bottle 2oz, Ethanol Denatured Alcohol 20, Potassium Iodide 1% solution 100ml, Potassium Thiocyanate 100ml, Sudan IV 2oz, Sulfuric Acid 10% solution 100ml, salad oil 2oz, Benedicts solution 100ml, Iodine .1 normal 4oz, Biuret solution 100ml, Starch Acetic Acid solution 100ml, chemical absorbent pad.
Today's emphasis on the artificial and natural ingredients of the foods that we eat has placed new emphasis on the chemical composition of that food. Examine the chemical, nature of many familiar food products. Experiments in this module: Presence of sugars, starches, fats and proteins, fruit discoloration, chemical composition of milk, presence of iodine in salt, calcium propionate in bread and the qualitative test for vitamin C and sulfur dioxide.
The Project Planetarium is ideal for individual study projects. Causes of 2 day and night, seasonal changes, phases of the moon, and planet locations are easily understood. The small planetarium model and solar system chart, 22"x17", may be set to show actual positions of the earth, the moon and planets at any given time. Each set includes planetarium, chart and study guide.
Students will learn important fossil concepts while investigating large specimens carefully selected to illustrate ideas about their formation. The Fossil Collection comes in a sturdy storage box that contains twelve large (2" x 3") specimens nestled in an attractive and durable display tray. The Teacher's Guide, reproducible student activity "field notebook", and reference cards for each specimen will ensure the successful use of these products. Also included are four quality hand lenses and a color identification chart designed to provide clues and answers for the student user. Grades 6-12. Ages 11-18.
• Install a sound module to generate the sounds of police cars
• Learn the important role resistors and potentiometers
• Use a multimeter to measure invisible voltage and current
• Use a FM radio module to build an alarm clock
Tap into the awesome world of electronics with this advanced system of snap-together electric building blocks. Start out by experimenting with colorful light-up circuits as you dive into the basics of electricity. Install a sound module to generate the sounds of police cars, ambulances, or fire engines. Learn the important role resistors and potentiometers (variable resistors) play in an electronic circuit. Use a multimeter to measure invisible voltage and current flowing through your circuit. Investigate transistors in switches and amplifiers to learn how the logical circuits in computers work. Build circuits that use sensors to detect moisture, temperature, and visible light. Incorporate capacitors in your circuits to store and discharge electricity for specific functions, such as a countdown clock and a red-green alternate flasher. Test out the indispensable 555 timer to build some complicated circuits. Use an operational amplifier and an FM radio module to build an alarm clock. This kit uses the same unique electric building blocks as our other electronics kits, with the addition of many new advanced components, allowing you to build more complex circuits. The more than 140 electronic components include capacitors, resistors, transistors, LEDs (light emitting diodes), phototransistor, switches, speaker, integrated circuit, infrared LED, diodes, FM tuner, 555 timer, operation amplifier, two potentiometers, electrodes, voltage and current meter, microphone, and 9-volt battery pack.
Capacity: 610 Grams Sensitivity: 0.1 Grams Calibrations: Front Beam - 10g x 0.1g, Center Beam - 500g x 100g, Rear Beam - 100g x 10g Adam's Triple Beam is today's best value for teaching mass measurement concepts from a brand scientists worldwide have trusted for over thirty years. It offers the functions and durability you need in a generous 2610g capacity plus an array of special classroom features that you will appreciate. With a larger overall body than other triple beam balances, it's the sturdiest choice for the classroom. Quality construction with strong metal housing and a stainless steel pan. Innovative built-in tripod legs allow you to do density demonstrations wherever you want (without the inconvenience of having to clamp onto a table.)
Capacity: 2000 Grams Readability: 1 Gram Pan Size: 14.5cm x 13.3cm Weighing Units: g, oz, lb, N Compact scales are easy to maintain and suitable for any environment. Scales use 3-AA batteries (included), or AC adapter (included). The energy saving features of auto shut-off (5 min.), long battery life and sturdy construction provides overload protection up to 150% of capacity. User calibration is digital from keypad with external weight. Display is 11mm LCD. Weighing modes: g, lb oz, N. Full-range tare as well as display indicators for low battery, overload, underload and stable conditions.
An easy way to observe and study a large frog without dissection. The Pro-Sect system displays partially dissected, 4"-5" bullfrogs. The bullfrogs are displayed in a transparent, safe-to-handle, liquid-filled, plastic tray that is moldered and sealed. Some of the internal organs such as the liver, heart, and veins and arteries have been injected with colored latex to identify their circulatory function. A comprehensive study guide provides information to assist the teacher and students. Individual internal organs are identified on a transparent overlay for study or testing purposes.
Contains all the basic professional borosilicate labware and equipment for conducting science experiments. The kit contains the text, "101 Science Experiments for Everyone" as a source of safe experiments.
Other components include:
1-Rubberized lab apron
1-Beaker - 100ml
1-Beaker - 250ml
1-Beaker - 400ml
1-Porcelain evaporating dish
1-250ml Erlenmeyer flask
1-Thistle tube, plastic
1-Safety goggles
1-50ml Graduated cylinder
1-Filtering paper
12-Medicine droppers
1-Spatula, stainless steel, 22cm length
1-Sponge 1x3-3/8"
3-Rubber stoppers, #6 solid
6-Test tubes 16x150mm
1-Test tube rack
1-Test tube brush
1-Test tube clamp, brass
1-Pair of crucible tongs
Pipestem triangle
1-Burner tripod, cast iron
1-Wire gauze square, 4x4"
1-Crucible, porcelain HF
1-Plastic cylinder 100 ml capacity
Quality glassware assortment for use in general science, or chemistry laboratory. Kit includes following items: two 100ml glass beakers, one 250 ml glass beaker, 1 400 ml glass beaker, two 4 oz. bottles w/ screw caps, two 50 ml Mohr burettes, 1 porcelain crucible, 1 porcelain crucible cover, 1 pipette eye dropper, 12 300ml barnes dropping bottles, 1 porcelain evaporation dish, one 75mm short stem funnel, one 75 mm watch glass, 1 porcelain mortar and pestle, one 10 ml glass cylinder, one 25 ml glass cylinder, one 50 ml glass cylinder, one 100 ml glass cylinder, six 13x100 test tubes, six 18x150 test tubes, six 25x200 test tubes, 4 glass capillary tubing, one 250 ml Erlenmeyer flask, one 8" glass rod and two 100 mm petri dishes. Designed for use by 2-4 students. Shipped in a reusable storage box. 57 pieces total.
Quality glassware assortment for use in general science, or chemistry laboratory. Kit includes following items: two 100ml glass beakers, one 250 ml glass beaker, 1 400 ml glass beaker, two 4 oz. bottles w/ screw caps, two 50 ml Mohr burettes, 1 porcelain crucible, 1 porcelain crucible cover, 1 pipette eye dropper, 12 300ml barnes dropping bottles, 1 porcelain evaporation dish, one 75mm short stem funnel, one 75 mm watch glass, 1 porcelain mortar and pestle, one 10 ml glass cylinder, one 25 ml glass cylinder, one 50 ml glass cylinder, one 100 ml glass cylinder, six 13x100 test tubes, six 18x150 test tubes, six 25x200 test tubes, 4 glass capillary tubing, one 250 ml Erlenmeyer flask, one 8" glass rod and two 100 mm petri dishes. Designed for use by 2-4 students. Shipped in a reusable storage box. 57 pieces total.