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Alloy a mixture containing two or more metallic elements or metallic and nonmetallic elements usually fused together or dissolving into each other when molten Steel A form of iron that is both durable and flexible. It was first mass-produced in the 1860s and quickly became the most widely used metal in construction, machinery, and railroad equipment. Brass an alloy of copper and zinc Impure MAtter a mixture of two or more different kinds of pure matter paper chromatography A method of separating the colors in a mixture based on the different weights of the molecules that make up the different pigments in the mixture. Solvent a liquid substance capable of dissolving other substances Solute the dissolved substance in a solution mixture (chemistry) a substance consisting of two or more substances mixed together (not in fixed proportions and not with chemical bonding) Rf factor relative front; number used to determine which pigment has been separated on the paper by dividing the movement of the pigment by the movement of the solvent. Bunsen Burner a gas burner used in laboratories Beaker a cup (usually without a handle) Electronic Balance A device for measuring the mass of an object that gives you a digital reading of the mass. Sparker Used to light bunsen burners in a lab Apron a garment of cloth or leather or plastic that is tied about the waist and worn to protect your clothing Graduated Cylinder a cylindrical graduate safety goggles Used to protect eyes Test tube glass tube closed at one end Petri Dish a shallow dish used to culture bacteria Test tube rack a rack that holds test tubes Thermometer a measuring instrument for measuring temperature Funnel a conically shaped utensil having a narrow tube at the small end Beaker Tongs used to pick up a hot beaker Wire mesh Used for holding beakers over flames. Ring Stand used to hold items being heated clamps or rings can be used so that items may be placed above the lab table for heating by bunsen burners or other items Erlenmeyer Flask a conical flask with a wide base and narrow neck