"The Mystery of Lyle and Louise"

Hematite-cemented quartz; orthoquartzite.

These 25 person bulk first aid kits meet OSHA and ANSI standards, and are designed for use in small offices, vehicles, and work sites.

Explore our planet like never before!

Shiny black volcanic glass showing conchoidal fracture and some spherulites.

Brownish black, intermediate stage between peat and bituminous coal.

Unpolished metamorphic rock with silky lusture, red-brown colour, and clear parallel intergrown quartz crystals.

The most commonly used buffer for agarose electrophoresis, this Tris-acetate-EDTA is certified free of Dnase, Rnase, and protease activity. Dilute 1 part in 39 parts deionized water. Store at room temperature. Available to U.S. customers only.

Protect Clothing from Spills and Splashes

One Racer, Endless Design Possibilities

Use a new wheel every time.

Attaches to the end of the Vernier Dynamics Track to prevent the cart from leaving the track.

Study different concepts utilizing sunlight or darkness.

Pre-mixed, and ready to use, this master mix contains DNA polymerase, dNTPs, MgCl₂, and reaction buffers at optimal concentrations for the amplification of DNA via PCR. Its special formulation allows for direct loading of PCR samples into agarose gels as well as tracking the migration during electrophoresis without the need for loading dyes. Simply add template, primers, and nuclease-free water, available separately. Mater Mix reduces risk of contamination. Includes enough for 100 reactions. Note: Can be stored at 4 °C for up to six weeks, or −20 °C for longer.

Improve student test scores and involve parents in the process. Fun, exciting, interactive, and inclusive, these sets of content-based games help students master curriculum outlined in the current NSES Standards for grades 1-8. Written by teachers using research-based principles, each game has been tested and proven effective in classrooms like yours. Each Class Pack set of games provides comprehensive coverage of topics required for science testing at that grade level. Engage students in learning with over 750 review cards, each set focused on a specific topic, and an additional 12 double-sided game boards for study and review.

Improve student test scores and involve parents in the process fun, exciting, interactive, and inclusive, these sets of content-based games help students master curriculum outlined in the current NSES Standards for grades 1 to 8.

Ten Lab Safety Practices Every Student Should Know