In combination with a detailed Teacher's Guide, this 16" x 12" x 3" 3-D model will help students understand weather fronts and other meteorological concepts. Students can conduct detailed studies of airmass structures, cloud types, precipitation, temperatures, pressure, and warm and cold fronts. Building upon this base of information, direction and speed of fronts can be measured, giving students the option of forecasting weather conditions for specific times and locations. Grades 4-12.
In combination with a detailed Teacher's Guide, this 16" x 12" x 3" 3-D model will help students understand weather fronts and other meteorological concepts. Students can conduct detailed studies of airmass structures, cloud types, precipitation, temperatures, pressure, and warm and cold fronts. Building upon this base of information, direction and speed of fronts can be measured, giving students the option of forecasting weather conditions for specific times and locations. Grades 4-12.
The rocks and soil that make up Earth's surface are constantly being affected by a variety of forces, ranging from heat and frost to water and wind. In Weathering and Erosion, students will discover the natural forces that cause weathering, erosion and deposition, and see the many effects that these processes have on Earth's surface. Students will examine natural structures around the world and see how weathering and erosion have affected them, while discovering ways in which people have become better prepared to battle these forces through conservation. In addition, a fun, hands-on experiment demonstrates how running water erodes different types of soil. Part of the Earth Science in Action DVD Series. A Teacher's Guide is included and available online. 23 minutes. Grades 5 to 8.
Hanging metric weights used to extend scale capacity of Ohaus 750-S0 and 750-SW metric triple-beam balances (not included). Cast iron construction has durability and long life. The set of three attachment weights includes two 1,000g weights and one 500g weight.
Calibration weights are used to measure the weight or mass of an object using a balance or scale, or to calibrate other weights or instruments. Calibration weights can be certified or uncertified. Certified weights meet strict guidelines for accuracy and can usually be recertified. Certified weights are used in labs where a high degree of accuracy and repeatability is required. Uncertified weights are used where a lower degree of accuracy is required, including student laboratories, rough weighting operations, and measuring force. Hooked and slotted weights are often used to measure pressure, torque, and tensile strength, and to demonstrate basic laws of physics. Calibration weights differ from lab weights, which are general purpose weights used to hold an object in place, similar to a paperweight.
Hanging metric weights used to extend scale capacity of Ohaus 750-S0 and 750-SW metric triple-beam balances (not included). Cast iron construction has durability and long life. The set of three attachment weights includes two 1,000g weights and one 500g weight. Calibration weights are used to measure the weight or mass of an object using a balance or scale, or to calibrate other weights or instruments. Calibration weights can be certified or uncertified. Certified weights meet strict guidelines for accuracy and can usually be recertified. Certified weights are used in labs where a high degree of accuracy and repeatability is required. Uncertified weights are used where a lower degree of accuracy is required, including student laboratories, rough weighting operations, and measuring force. Hooked and slotted weights are often used to measure pressure, torque, and tensile strength, and to demonstrate basic laws of physics. Calibration weights differ from lab weights, which are general purpose weights used to hold an object in place, similar to a paperweight.
• Made with 0.35mm thick PVC and polyester fabric
• Detachable hood with drawstring
• Storm flap front with snap closure
• 2 flapped front pockets with snap closures to secure valuables
• Cape vented back
• Corduroy collar for comfort
• Available in 4 Sizes
• Available with or without CROSSING GUARD Emblem on Back
This bright yellow rain jacket is made of tough .35mm PVC and polyester fabric. Corduroy lined collar for comfort. Coat has cape-vented back . Includes detachable hood.
| Chest | Length | Sleeve | |
| Medium | 56 in. | 30.5 in. | 32 in. |
| Large | 58 in | 31.5 in. | 33 in. |
| X-Large | 60 in. | 32 in. | 34 in. |
| 2X-Large | 62 in. | 33 in. | 35 in. |
In this step-by-step classroom project students examine and identify individual rock specimens. As each rock specimen is examined and identified, students progress toward the completion of their own rock reference charts. The Teacher's reference chart uses illustrations and actual specimens for students to consult as they identify unlabeled rock specimens. For grades 6-12.
This chart has illustrations and actual specimens for students to consult as they identify unlabeled rock specimens. For grades 6-12. 23 1/2" x 15 1/5".
For use with 12046 What Rock Is It? classroom project.
Attention crossing guards! Stay prepared and enhance safety on the streets with our Econo Lanyard and Whistle combo. The Econo Lanyard provides a practical way to keep your whistle within easy reach, ensuring you're ready to signal pedestrians and control traffic with efficiency. The Medium-Weight Metal Whistle, easily attaches to the lanyard, delivers a clear, sharp sound to effectively communicate directions and ensure safety. This durable and dependable pair is perfect for school crossings, intersections, and traffic control, offering you an affordable, long-lasting, and essential tool to excel in your role as a crossing guard. Elevate your safety measures with this invaluable package!
Includes:
• One 1 3/4" long Nickel-plated brass whistle.
• One Economy Lanyard with metal J-hook for quick and easy attachment
• Polyethylene bottle with polypropylene cap
• Excellent chemical resistance
• Features sealing plugs for leak-proof closure.
• Easy grip caps can be wired down for security.
• Head space between cap and insert plug can be used for confidential notes.
100ml Polyethylene bottle with polypropylene cap. Polyethylene bottles provide excellent chemical resistance and feature sealing plugs for leak-proof closure. Easy grip caps can be wired down for security. Head space between cap and insert plug can be used for confidential notes.
These polypropylene bottles are rigid, translucent and have excellent contact clarity. These bottles can be autoclaved filled as well as empty. The polypropylene cap has a built-in seal ring to make these bottles leak proof.
| Size | Height | Neck Diameter ID/OD |
Pack Size |
| 60ml | 73mm | 20mm / 25mm |
Pack of 12
|
| 125ml | 100mm | 27mm / 32mm |
Pack of 12
|
| 250ml | 137mm | 35mm / 41mm |
Pack of 12
|
| 500ml | 149mm |
35mm / 41mm |
Pack of 12
|
|
1000ml
|
218mm |
35mm / 41mm |
Pack of 6
|
Polypropylene Space saving, graduated bottles are ideal for long-term storage of samples. Easy grip caps can be wired down for security. Head space between cap and insert plug can be used for confidential notes.
1-14 Paper strips, change for each full pH unit,100 strips per vial.
1-14 Paper strips, change for each full pH unit,100 strips per vial.
This program explores the mechanics of measuring wind speed and direction as well as the use of wind as an energy source. Students will also learn how wind occurs by finding out about the roles of temperature, air pressure and the sun. Graphics and animation will clearly illustrate these patterns. Students will also learn how hot-air balloons work in this exciting look at weather's invisible force. 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 & Internet resources. 23 minutes. Grades 4 to 7.
Personal safety & signaling device. Loud consistent sound every time. Referees and coaches find it easier to give verbal commands without a whistle in their mouth. Each set of "AAA" batteries produces more than 1000 blasts. Loud 105-dB whistle sound can be aimed in the exact direction intended and away from user. Hand operated instead of mouth blown for better hygiene. 4" long.
• Personal safety & signaling device.
• 3 Tones (including Pealess Whistle) – Grey with Black trim
• Loud 105-dB
• Each set of AAA Batteries produces more than 1000 blasts
• Whistle sound can be aimed in the exact direction intended, and away from user
• Loud, Consistent Sound Every Time, even if user is short of breath or injured
• Hand operated instead of mouth blown is sanitary, even for multi users
Personal Safety & Signaling Device for Crossing Guards, Referees, Coaches, Hikers, Hunters, Campers, Senior Citizens, Joggers, and anyone who could benefit from carrying a whistle. Electronic whistles make it easier the user to give verbal commands without a Whistle in their mouth, yet with Whistle sound always “at the ready”.
Quickly removes insulation without damaging wire. Set screw adjusts stripper to fit wire gauges from 10 to 24. Made from drop-forged, heat treated steel with black baked enamel finish. PVC handles. Total length is 4 inches.
Hi-viz pink breakaway vest. Does not meet ANSI requirements. 2 interior open waist pockets that will hold a 5.5" cell phone. 100% polyester tricot. Hook & loop front closure. 2" AwareLite reflective trim.
• Lightweight, multi-season.
• Rainguard zipper closure with interior storm flap.
• Comfort collar, fleece-lined.
• Three fused fabric layers.
• Breathable, waterproof and wind resistant.
• Comfortable polyester/spandex outer shell fused with fleece liner.
• Two exterior slash pockets with rain guard zipper closure.
• Channeled hem with cinch cord and cord lock for adjustable fit.
• Deluxe adjustable cuffs.
• Contoured waist.
Women's Class 2 polyester bonded with fleece. Contoured waste for better fit. 3 fused fabric layers: soft outer shell, weather resistant middle and warm brushed fleece interior. Breathable, water and wind resistant. Comfortable polyester/spandex. Draw string hem with cord stopper. Black bottom hides dirt and grime. 2 zippered slash pockets. Adjustable sleeve cuffs. Zipper closure with tunnel collar. Conforms to ANSI 107 standard.
Designed for spherical mirrors and lenses. Support is 5" tall and has a 1.5" V-shaped grooved wedge to hold mirrors or lenses 38mm to 100mm securely in place.
Designed for spherical mirrors and lenses. Support is 5" tall and has a 1.5" V-shaped grooved wedge to hold mirrors or lenses 38mm to 100mm securely in place.
Well constructed. Hardwood. Test tube supports being made of 5/16" stock are much stronger than the ordinary grade. Post joints of the heavy base supports are glued and nailed top and bottom. All other supports assembled with dovetail joint. All supports finished in paraffin oil.
Well constructed. Hardwood. Test tube supports being made of 5/16" stock are much stronger than the ordinary grade. Post joints of the heavy base supports are glued and nailed top and bottom. All other supports assembled with dovetail joint. All supports finished in paraffin oil.
Prismatic reflectors for full, even light pattern, perfect for professional working conditions. Brighter beam with a 100% brighter Krypton bulb. Toolbox-tough polypropylene construction resists impact, gas, grease, chemicals, water, corrosion. Scratch-resistant, break-resistant lens. Full lifetime warranty. Made in the U.S.A. Switches torture-tested to 100,000 on/off cycles. Resistant to extremes of temperature and humidity. Great for night-time traffic or pedestrian control. Visible at 50 yards. 8" polyethylene wands have removable end caps for directing beam of light. Uses 2 "D" Batteries.
Prismatic reflectors for full, even light pattern, perfect for professional working conditions. Brighter beam with a 100% brighter Krypton bulb. Toolbox-tough polypropylene construction resists impact, gas, grease, chemicals, water, corrosion. Scratch-resistant, break-resistant lens. Full lifetime warranty. Made in the U.S.A. Switches torture-tested to 100,000 on/off cycles. Resistant to extremes of temperature and humidity. Uses 2 "D" Batteries.
Full-color molded plastic relief map. Correlate landforms with political boundaries, cities, agricultural developments. Includes time zones, scales and color keys to terrain, vegetation and ocean features. Keys to populations of major cities, national capitals, major ocean depths, and Antarctic expedition bases. 36" x 20".
This 24" inflatable writable globe has a white background with outlined countries. The ball may be used over and over again with a wet erase marker (not included) to test your students geography skills.