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_____ are glass tubes surrounded by concentric layers of glass, called “cladding,” to form a light p... are made of tiny glass tubes that allow information to be sent to and from data centers using light... _____ like plastic and glass are used to prevent electricity from moving outside its circuit. Fill... A _____ is a peice of glass or other transparent material which refracxts light how does glass walls glass ceilings or glass escalator effect native Americans? Glass A is a cylinder Glass B is a cone The water glasses are filled to the same height and have t... Glass A - Cylinder, Glass B - Cone: The water glasses are filled to the same height and have the sam... What does "glass ceiling, glass walls, or glass escalator mean"? _____ land surrounded on three sides by water 1. Lake 2. Plateau 3. Isthmus 4. Peninsula _____ Lance surrounded on all sides by water smaller than a continent 1. Plateau 2. Strait 3. Is...