Perform four important water pollution experiments. — Test water samples for dissolved oxygen content, chlorides, phosphates, and water hardness. — All tests provide professional results. Includes all necessary apparatus and materials.
Students will determine the amount of smoke in a cigarette, which has the lowest tar content, the collection efficiencies of different cigarette filters, the cigarette filter length most efficient for tar removal, and which half of a cigarette contains less tar. — Includes: color comparator for tar content, plexiglass base, filter holder/smoking apparatus, 25 filters, rubber aspirator and instructions.
Use these self-contained swabs to quickly test any surface for the presence of lead. — — The swabs are odorless and are a safe, quick and reliable method to detect lead on metals, paint, dust, ceramics and plastic. Simply rub the test swab on the surface-if any lead is present, the swab will instantly turn pink to red. Includes istructions.
Learn to isolate DNA material from food and vegetables found in your refrigerator! After isolating the DNA in a test tube, continue the experimentation. Contains 5 test tubes, 5 pipettes, 5 extraction plates, 1 string chromosome, lysis reagent, precipitation reagent (denatured alcohol), and instructions. Ages 9 and up. Because of alcohol, parent supervision advised.