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.
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.
Introduce your students to the fundamentals of chemistry. Provide your class with a basic understanding of the primary concepts of chemistry as they investigate how matter is classified, identify the various types of mixtures, and compare the properties of solutions with the properties for mixtures. They'll also learn to identify elements and compounds and study how chemical symbols, formulas and equations are used to describe chemical reactions. Grades 7-10.
Tin Metal, reagent, 20-300mesh, granular - 100g.
Look in the box and see the lunar phases in three dimensions! Each hole shows a different lunar phase! Comes with 5 stickers, full moon, new moon, waning moon, crescent moon, and quarter moon. 7.5" x 7.5" x 3.1".
Reversible Northern and Southern Skies. Printed in 2 colors. Compare night skies from the northern and southern hemispheres with royal blue star chart. Constructed of strong, plasticized material, this chart highlights constellations, stars, nebulae and the milky way. Chart can be rotated to reflect any date of observation. Dry erasable. Measures 44" length by 44" width. For grades 6-12. Ages 11-18.
This 12" x 18" sign is screened on both sides. Constructed of nylon reinforced vinyl over a wire frame. Great for indoor or outdoor use. Sign comes with cone attachment and a 28" high impact polyethylene cone. 12" x 18" Sign. High Visibility. Interchangeable. Screened on Both Sides. Includes 28" Cone & Attachment. Overall Height is 56".
This 12" x 18" sign is screened on both sides. Constructed of nylon reinforced vinyl over a wire frame. Great for indoor or outdoor use. Sign comes with cone attachment and a 28" high impact polyethylene cone. 12" x 18" Sign. High Visibility. Interchangeable. Screened on Both Sides. Includes 28" Cone & Attachment. Overall Height is 56".
This 12" x 18" sign is screened on both sides. Constructed of nylon reinforced vinyl over a wire frame. Great for indoor or outdoor use. Sign comes with cone attachment and a 28" high impact polyethylene cone. 12" x 18" Sign. High Visibility. Interchangeable. Screened on Both Sides. Includes 28" Cone & Attachment. Overall Height is 56".
• Instant identification of staff and aides.
• Required in many states for emergency use
• Constructed of nylon reinforced vinyl
• Elastic straps to enable the band to fit most size arm
• Includes 1 each - Security, Emergency, Teacher, Staff & Monitor
The I.D. arm bands are required in many states for emergency use for instant identification of staff and aides. These arm bands are constructed of nylon reinforced vinyl with elastic straps to enable the band to fit most size arm. 1 each - Security, Emergency, Teacher, Staff and Monitor