| Materials: Apron: A garment, usually fastened in the back, worn over all or part of the front of the body to protect clothing. Goggles: goggles A pair of tight-fitting eyeglasses, often tinted or having side shields, worn to protect the eyes from hazards such as wind, glare, water, or flying debris. Beaker: A wide cylindrical glass vessel with a pouring lip, used as a laboratory container and mixing jar. Test Tube: A clear, cylindrical glass tube usually open at one end and rounded at the other, used in laboratory experimentation. Balance: A weighing device, especially one consisting of a rigid beam horizontally suspended by a low-friction support at its center, with identical weighing pans hung at either end, one of which holds an unknown weight while the effective weight in the other is increased by known amounts until the beam is level and motionless. |