Build 3-D models of molecules! Each atom center is designed to accept bonds at the proper angle which gives the appearance of molecular bonding. Molecular sets are easily constructed using the plastic components. 12 sets each: 2 black tetrahedral carbon centers 2 Blue tetrahedral nitrogen centers 6 Green univalent chlorine centers 4 Red diunivalent oxygen centers 1 Yellow diunivalent sulfur center 8 White univalent hydrogen centers 20 Plastic bond connectors 4 Flexible connectors Teacher's Guide and reproducible student worksheet are included.
This kit is a unique teaching tool for introducing your students to the chemistry behind plant pigments (the blueberry biopigment cyanidan) and how they can be used as pH indicators and fabric dyes. They use their knowledge to create their own pH test strips and evaluate them against a commercial type. Includes materials for four detailed activities featuring "model" and "inquiry" investigation paths – a total of 11 investigational activities, which can accommodate up to 40 students! Also contains a DVD with PDF Teacher and Student Guides and other digital content (see below). Covered concepts include: data analysis, accuracy vs. precision, biopigment structure, pH, pH scale, pH indicators, stains and dyes, acids, bases, acid-base interactions, solutions, and self ionization of water. STEM based curriculum kits accent the scientific method and independent inquiry featuring hands-on learning materials and exciting interactive digital content that can be accessed on a computer, tablet or your mobile device. Kits contain structured, guided, and open investigations, at introductory, intermediate, and advanced levels, to make inquiry based learning affordable and fun. Requires additional household materials for independent investigations. Student activity PDFs have a special Typewriter functionality allowing them to take notes, record experimental data, and answer analysis questions. They simply e-mail their worksheets back to you!
This kit is a unique teaching tool for introducing your students to the chemistry behind plant pigments (the blueberry biopigment cyanidan) and how they can be used as pH indicators and fabric dyes. They use their knowledge to create their own pH test strips and evaluate them against a commercial type. Includes materials for four detailed activities featuring "model" and "inquiry" investigation paths – a total of 11 investigational activities, which can accommodate up to 40 students! Also contains a DVD with PDF Teacher and Student Guides and other digital content (see below). Covered concepts include: data analysis, accuracy vs. precision, biopigment structure, pH, pH scale, pH indicators, stains and dyes, acids, bases, acid-base interactions, solutions, and self ionization of water. STEM based curriculum kits accent the scientific method and independent inquiry featuring hands-on learning materials and exciting interactive digital content that can be accessed on a computer, tablet or your mobile device. Kits contain structured, guided, and open investigations, at introductory, intermediate, and advanced levels, to make inquiry based learning affordable and fun. Requires additional household materials for independent investigations. Student activity PDFs have a special Typewriter functionality allowing them to take notes, record experimental data, and answer analysis questions. They simply e-mail their worksheets back to you!
An investigative study into the chemical nature of commercial shampoos. The student can perform the following experiments: pH determination; solid content determination; determination of flash foam formation; determination of foam retention time; determination of relative viscosity; India Ink dispersion test and determination of cost per 5 ml of shampoo. Each kit provides materials for 12 pairs of students. Grades 8-12.
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.
Observe the effects of 3 doses of gamma irradiation on seeds and compare with control seeds. Rye grass and mung bean seeds have a short germination period, so students can see the effects within 48 hours and the experiment can be completed within 2 weeks. Kit contains enough for 30 students to work individually.
Learn concepts of air pollution and its harmful effects using one form of a common air pollutant, sulfur dioxide on experiments with plant life. This kit provides instruction, apparatus and materials to experiment with plant seedlings exposed to a sulfur dioxide atmosphere at a known concentration which produces an effect on plant life that can easily be observed within several days.
This three dimensional model of the sun and planets teaches planet identification, sizes, distance and color. The planets may be set by month to show relative positions. A sturdy base supports the 6" diameter sun with the outer planet 18" from the sun. Illustrated Study Guide includes position table. Lesson Plan facilitates explanation of orbit and speed. 12" x 22" x 8".
The Navicade was introduced to the market in 2005 and has really taken off as a replacement for barrels. The narrow design and offset handle makes picking up and setting up extremely quick and easy.. Unique Handle Design. Slim Style - 49.25" H x 7.6" W. Weighs only 3 lbs. (without base). Molded-in holes for mounting light and ropes. Can be used to rope work area. Stackable for easy transportation or storage. Snug fitting bases will not be knocked over. Accepts up to four (4) bands of 4" reflective sheeting. Navicade is designed for easy placement and pick-up from a truck bed. Made of durable low-density polyethylene. Federal Highway Administration Approved. NCHRP 350 Compliant
The Navicade was introduced to the market in 2005 and has really taken off as a replacement for barrels. The narrow design and offset handle makes picking up and setting up extremely quick and easy.. Unique Handle Design. Slim Style - 49.25" H x 7.6" W. Weighs only 3 lbs. (without base). Molded-in holes for mounting light and ropes. Can be used to rope work area. Stackable for easy transportation or storage. Snug fitting bases will not be knocked over. Accepts up to four (4) bands of 4" reflective sheeting. Navicade is designed for easy placement and pick-up from a truck bed. Made of durable low-density polyethylene. Federal Highway Administration Approved. NCHRP 350 Compliant
• One of the most visible and space efficient barricades available
• Takes up half the space of traditional barricades
• Designed to withstand repeated impacts with little or no damage
• Has a recessed panel with high intensity reflective sheeting
• Measures 8"w x 36"h with 30 lb base
• Gemstone side wall provides strength and durability
• Oversized handle with comfort grip
• Flashing light mounting receptacle
• Made of low density polyethylene
• Federal Highway Administration Approved with HAS-10 / WZ-89
• NCHRP Compliant
The Gemstone is one of the most visible and space efficient barricades available. It takes up half the space of traditional barricades, which means less storage space taken and minimal footprint during use. Designed to withstand repeated impacts with little or no damage to vehicles or unit. Stackable with 30 pound base. Has a recessed panel with high intensity reflective sheeting. Measures 8"w x 36"h. Gemstone side wall provides strength and durability. Flashing light mounting receptacle. Picking up and transporting (even with light attached) is a breeze because of its large handle with comfortable grip. Made of low density polyethylene. Federal Highway Administration Approved with HAS-10 / WZ-89. NCHRP Compliant.
• One of the most visible and space efficient barricades available
• Takes up half the space of traditional barricades
• Designed to withstand repeated impacts with little or no damage
• Has a recessed panel with high intensity reflective sheeting
• Measures 8"w x 36"h
• Gemstone side wall provides strength and durability
• Oversized handle with comfort grip
• Flashing light mounting receptacle
• Made of low density polyethylene
• Federal Highway Administration Approved with HAS-10 / WZ-89
• NCHRP Compliant
The Gemstone is one of the most visible and space efficient barricades available. It takes up half the space of traditional barricades, which means less storage space taken and minimal footprint during use. Designed to withstand repeated impacts with little or no damage to vehicles or unit. Stackable with 20 pound base. Has a recessed panel with high intensity reflective sheeting. Measures 8"w x 36"h. Gemstone side wall provides strength and durability. Flashing light mounting receptacle. Picking up and transporting (even with light attached) is a breeze because of its large handle with comfortable grip. Made of low density polyethylene. Federal Highway Administration Approved with HAS-10 / WZ-89. NCHRP Compliant.
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 24" (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. 18" x 24" (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. 18" x 24" (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. 24" 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 24" x 24".
• 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.
Our Swivel mount Sign Frames for retractable belt stanchions enable setting and locking the frames in 8 different viewing angles. These exclusive Beltrac post frames are the best in the industry. They feature radius corners, eliminating sharp edges near your customers for safety and sleek design. Each frame includes twin clear acrylic panels designed to accept regular 8 1/2" x 11" printed paper. Choose between a slotted frame top for easy graphic change or a fully enclosed frame for more tamper proof signs or advertising display.
Our Swivel mount Sign Frames for retractable belt stanchions enable setting and locking the frames in 8 different viewing angles. These exclusive Beltrac post frames are the best in the industry. They feature radius corners, eliminating sharp edges near your customers for safety and sleek design. Each frame includes twin clear acrylic panels designed to accept regular 8 1/2" x 11" printed paper. Choose between a slotted frame top for easy graphic change or a fully enclosed frame for more tamper proof signs or advertising display.
Our Swivel mount Sign Frames for retractable belt stanchions enable setting and locking the frames in 8 different viewing angles. These exclusive Beltrac post frames are the best in the industry. They feature radius corners, eliminating sharp edges near your customers for safety and sleek design. Each frame includes twin clear acrylic panels designed to accept regular 8 1/2" x 11" printed paper. Choose between a slotted frame top for easy graphic change or a fully enclosed frame for more tamper proof signs or advertising display.
Engineered to provide superior comfort and safety in the toughest work environments. ANSI/ISEA 107 Class 3 compliant for high visibility and breathability. Loaded with premium features for multipurpose applications. Fluorescent yellow-green background material for excellent daytime visibility. 2" silver reflective tape reflects light for 360 degree nighttime conspicuity. For use in environments where high visibility and breathability are desired for wearer safety and comfort. All outerwear is constructed of 5.5 ounce 12 mil thick material.
FEATURES and BENEFITS
• Waterproof, breathable fabric for all season comfort
• Stitched and taped sealed seams for 100% waterproof protection
• Comes with heavy duty suspenders with quick release buckles
• Crossover, Velcro take-up straps on leg cuffs
• Take-up snaps on overall waist for adjustable fit