• Cargille Immersion oils meet ISO standards for performance
• Available in 1/4 oz bottles
• Types A and B are used for most fluorescent microscopy applications, type NVH.
Cargille Immersion Oil is required for high magnification and to obtain sharp images with clear resolution. These Immersion oils meet ISO standards for quality. Type A (low viscosity) and Type B (high viscosity) are used for normal microscopy applications with viscosities from 150-1250 (centistokes). The greater the gap between cover glass and objective, or condenser and slide, the more desirable high viscosity becomes. Type A and B are both used for most fluorescent microscopy applications, but Type A has a lower viscosity, which reduces any tendency to trap air causing image degradation and is easier to clean up.
• Cargille Immersion oils meet ISO standards for performance
• Available in 1/4 oz bottles
• Types A and B are used for most fluorescent microscopy applications, type NVH.
Cargille Immersion Oil is required for high magnification and to obtain sharp images with clear resolution. These Immersion oils meet ISO standards for quality. Type A (low viscosity) and Type B (high viscosity) are used for normal microscopy applications with viscosities from 150-1250 (centistokes). The greater the gap between cover glass and objective, or condenser and slide, the more desirable high viscosity becomes. Type B is recommended when there is a larger gap between your cover slip and the objective. For extremely large gaps, NVH is required.
Sturdy plastic impact car features a graduated spring scale and a slide that is displaced on impact against an obstacle. Includes activity guide.
Sturdy plastic impact car features a graduated spring scale and a slide that is displaced on impact against an obstacle. Includes activity guide.
• 12”x 36”fluorescent yellow reflective sheeting with 10”x 24 white insert.
• Overall height of unit is 47”
• Post and panel are constructed of flexible polyethylene plastic
• Resistant too: ultraviolet light, ozone, and hydrocarbons.
• Anti-twist reactive spring assembly that rebounds to upright when struck.
• NCHRP-350 Approved.
• Weight: 12 pounds without base
Recommended Uses: Ideal for delineating crosswalks to reduce the risk of injury, death, and property damage.
These In-Street Pedestrian Crosswalk Signs provide enhanced conspicuity at un-signalized intersections in order to alert motorists to local laws concerning yielding to or stopping for pedestrians in crosswalks. The effectiveness of these pedestrian safety signs have been repeatedly supported by independent studies to demonstrate distinct changes in motorist behavior and accident incidence following installation.
Take care to avoid creating a trip hazard when using any sign in a crosswalk. Ensure that sign bases are installed outside the crosswalk area.
Bases NOT included (Order separately as indicated below)
- Pedestrians Crosswalk Signs with Fixed Post Spring can be used with the SS672P Surface Mount Fixed Base.
- Pedestrians Crosswalk Signs for Quick Release Post Spring can be used with the SS671P One Base® Portable Quick Release Base, or the SS673P Surface Mount Quick-Release Base.
• 100% polyester fabric with matching color trim
• Hook & loop front closure
• White 1” wide reflective material (White vest uses lime reflective material)
• Upper right chest pocket with pencil/pen division (5” wide x 5” tall)
• Inside lower right patch pocket (5.5” wide x 5.75” tall)
• Non-ANSI Compliant
Incident command vests come in 12 different colors, making them easy to identify staff and crew by job, team or rank during school events, workshops or emergencies. Just assign a different color to each group. Each vest has clear plastic card holders on the front and back to hold 4.25" x 11" (back) and 3" x 5" (front) cards, so you can label each vest any way you choose. Vest is100% polyester fabric with matching color trim. Hook & loop front closure. White 1" wide reflective material (White vest uses lime reflective material). Has an upper right chest pocket with pencil/pen division (5" wide x 5" tall). Inside lower right patch pocket (5.5" wide x 5.75" tall). Non-ANSI Compliant.
Polished wooden top 600x100x 20mm. With pulley. Hinged to a polished wooden base 400 x 100 x 20mm. The plane can be fixed at any angle with the help of a clamp. Supplied complete with aluminum graduated protractor, cylindrical plated metal roller 38mm in diameter and scale pan but without weights.
Polished wooden top 600x100x 20mm. With pulley. Hinged to a polished wooden base 400 x 100 x 20mm. The plane can be fixed at any angle with the help of a clamp. Supplied complete with aluminum graduated protractor, cylindrical plated metal roller 38mm in diameter and scale pan but without weights.
This versatile and tough steel inclined plane includes a graduated protractor and an adjustable pulley. Incline is 4" wide and 23" long. Includes a 14 oz. roller that can be used as a vehicle on the plane or as a counterweight. Also includes a pan and cord for masses.
This versatile and tough steel inclined plane includes a graduated protractor and an adjustable pulley. Incline is 4" wide and 23" long. Includes a 14 oz. roller that can be used as a vehicle on the plane or as a counterweight. Also includes a pan and cord for masses.
This robustly constructed inertia demonstrator works reliably every time and is a great improvement on traditional versions of this classic experiment. A steel ball rests on a thin metal card on top of a pillar, and a spring-loaded catch is mounted next to the pillar. When the catch is released, a piston strikes the edge of the metal card sharply. The card flies out from under the ball, which remains in place on top of the pillar due to its large inertial mass. The card is tethered to the aluminum base for easy recovery after the experiment.
This robustly constructed inertia demonstrator works reliably every time and is a great improvement on traditional versions of this classic experiment. A steel ball rests on a thin metal card on top of a pillar, and a spring-loaded catch is mounted next to the pillar. When the catch is released, a piston strikes the edge of the metal card sharply. The card flies out from under the ball, which remains in place on top of the pillar due to its large inertial mass. The card is tethered to the aluminum base for easy recovery after the experiment.
Demonstrate rotation, revolution, and orbit in 3 dimensions with this durable, washable solar system set.
Teach the position, order, size, and shape of the planets and sun
Also great for creating an out-of-this-world playroom or bedroom
Each colorful planet (and sun) inflates easily
Loops included for easy hanging
This unique solar system set turns any room into an intergalactic experience
Includes
8 planets with hanging hooks, Pluto, Sun, Earth’s Moon, convenient foot pump, activity guide with fun planet facts, Repair kit
•Measure 5”-23” in diameter:
•Age 5+
•Grade K+
Demonstrate rotation, revolution, and orbit in 3 dimensions with this durable, washable solar system set. Teach the position, order, size, and shape of the planets and sun. Also great for creating an out-of-this-world playroom or bedroom. Each colorful planet (and sun) inflates easily. Loops included for easy hanging. This unique solar system set turns any room into an intergalactic experience. Includes: 8 planets with hanging hooks, Pluto, Sun, Earth’s Moon, convenient foot pump, activity guide with fun planet facts, Repair kit. Measure 5”-23” in diameter: Age 5+. Grade K+.
• 7.5" x 3.25" insert sign for SS604M and SA150M Sign Vests
• Printed on 110 lb. card stock
• 8 legends available
• Instant cold pack to soothe injuries
• Simply squeeze to activate cold compress
• 4" x 9"
• Case of 16
• Single use only
22 Gauge insulated copper wire. 100 ft. Color: Black
22 Gauge insulated copper wire. 100 ft. Color: Black
22 Gauge insulated copper wire. 100 ft. Color: Red
22 Gauge insulated copper wire. 100 ft. Color: Red
22 Gauge insulated copper wire. 100 ft. Color: White
22 Gauge insulated copper wire. 100 ft. Color: White
36" x 24" full color laminated poster. "We can follow our dreams to distant stars...," declared President Reagan when he proposed this ambitious project in his 1984 State of the Union address. This poster provides a comprehensive overview of the program goals, how it got started, its various components, and its appearance when finished. The visiting Space Shuttle provides scale.
36" x 24" full color laminated poster. "We can follow our dreams to distant stars...," declared President Reagan when he proposed this ambitious project in his 1984 State of the Union address. This poster provides a comprehensive overview of the program goals, how it got started, its various components, and its appearance when finished. The visiting Space Shuttle provides scale.
36" x 24" full color laminated poster.
Fossils were a mystery for thousands of years; then a few pioneering scientists realized that they were the remains or traces of once-living organisms.
Well-known bone-type fossils are actually rocks, the result of a process called mineralization in which minerals replace decaying tissue. This process is shown and explained. All of the other fossil types are also explored.
The rarity of fossils is dramatically presented, and strange things sometimes mistaken for fossils are identified. There’s an introduction to fossil expeditions and a summary of how fossils contribute to our understanding of the earth and life on it.
There is an especially helpful section on the relationships between fossils and geology. It covers the principle of original horizontality, the law of superimposition, the principle of faunal succession, the geological time scale, index fossils, relative dating, and absolute dating.
All of this is conveyed through detailed illustrations showing the processes, excellent photographs of representative specimens, and interesting and informative captions. This poster is a great aid to museum interpretive programs and is extremely beneficial in the study of both life and earth sciences.
36" x 24" full color laminated poster.
This poster begins by defining a mineral. It then expands on that by exploring atoms, molecules, and crystal structure. The various crystal structures are explained. This is followed by an excellent summary of the mineral classes.
Mineral collectors and students want to identify their specimens. However, specimens of the same mineral can vary greatly in appearance, which can make that a daunting task. Identification is based on a number of properties.
This poster provides an outstanding introduction to those properties: hardness, habit, luster, cleavage, specific gravity, color, streak, and fluorescence. Illustrations are used to explain principles. Photographs of truly outstanding specimens are used as examples.
36" x 24" full color laminated poster. This poster begins by defining a mineral. It then expands on that by exploring atoms, molecules, and crystal structure. The various crystal structures are explained. This is followed by an excellent summary of the mineral classes. Mineral collectors and students want to identify their specimens. However, specimens of the same mineral can vary greatly in appearance, which can make that a daunting task. Identification is based on a number of properties. This poster provides an outstanding introduction to those properties: hardness, habit, luster, cleavage, specific gravity, color, streak, and fluorescence. Illustrations are used to explain principles. Photographs of truly outstanding specimens are used as examples.
Note:
(l.s.) longitudinal section
(t.s) transverse section
(w.m) whole mount
(sec) special section
(c.s) cross section
Set Includes:
• B1 Conjugation of Spirogyra
• B2 Lichen (w.m.)
• B3 Moss Cluster (w.m.)
• B4 Spinal Cord (t.s.)
• B5 Wheat Seed (l.s.)
• B6 Pinus Pollen (w.m.)
• B7 Stem of Dicotyledon (t.s.)
• B8 Stem of Monocotyledon (t.s.)
• B9 Triticum Aestivum Leaf Eiders (w.m.)
• B10 Terminal Bud (l.s.)
• B11 Single Cell Zoo (w.m.)
• B12 Animal Cell Mitosis
• B13 Cardiac Muscle (sec)
• B14 Blood Smear
• B15 Kidney (l.s.)
Introduce the world of microscopy to your students through the selection of this prepared slide set which features numerous intriguing specimens to study and get them interested in biology. High-quality, yet affordable, 1"x 3"slides labeled and stored in a slotted plastic container. Set of 15 prepared slides. Set Includes: B1 Conjugation of Spirogyra B2 Lichen (w.m.) B3 Moss Cluster (w.m.) B4 Spinal Cord (t.s.) B5 Wheat Seed (l.s.) B6 Pinus Pollen (w.m.) B7 Stem of Dicotyledon (t.s.) B8 Stem of Monocotyledon (t.s.) B9 Triticum Aestivum Leaf Epidermis (w.m.) B10 Terminal Bud (l.s.) B11 Single Cell Zoo (w.m.) B12 Animal Cell Mitosis B13 Cardiac Muscle (sec) B14 Blood Smear B15 Kidney.
Provides a primary presentation of the basic rock types. Includes five each of igneous, sedimentary and metamorphic rocks, totaling 15 specimens, approximately 1.5" x 1.5". Grades 6-12. Ages 11-18.
Inquiry-based activities covering the basics of electricity. Perform a variety of hands-on investigations to study the properties of electricity. Students will explore the concepts of electric currents, open and closed circuits, and series and parallel circuits. They?ll also investigate static electricity using an electroscope. The students will apply the knowledge gleaned from these activities to classify materials as either conductors or insulators of electricity and electrical power. Your students will understand concepts of electrical charge, current, resistance and voltage. Understand the concept of electric circuit and power. Distinguish between resistors in series and parallel. Classify materials as electrical conductors or insulators. Identify cases from everyday life where electricity is being used. Class Size: 40 Students. Grades 7-10
Inquiry-based activities covering the basics of electricity. Perform a variety of hands-on investigations to study the properties of electricity. Students will explore the concepts of electric currents, open and closed circuits, and series and parallel circuits. They?ll also investigate static electricity using an electroscope. The students will apply the knowledge gleaned from these activities to classify materials as either conductors or insulators of electricity and electrical power. Your students will understand concepts of electrical charge, current, resistance and voltage. Understand the concept of electric circuit and power. Distinguish between resistors in series and parallel. Classify materials as electrical conductors or insulators. Identify cases from everyday life where electricity is being used. Class Size: 40 Students. Grades 7-10
Provide your classroom with an unforgettable, hands-on lesson on ecology and the food chain. Your students will dissect owl pellets to study the skeletal remains of the raptor's prey and, using a dichotomous key, identify the species consumed. Also construct a rodent skeleton from the recovered skeletal prey. With their findings, students will construct a food web, compiling a summary of the owl's diet in order to estimate the diversity of the prey available in the ecosystem.
For use with Fossil Chart 16785.
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.
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.