reformed digital layers cooled results absorb laser mix reflect become heat controlling Similar to CD-R, the CD-RW’s polycarbonate substrate is preformed with a spiral groove to guide the ( 1 ). The alloy phase-change recording layer, which is commonly a ( 2 ) of silver, indium, antimony, and tellurium, is sandwiched between two ( 3 ) of dielectric material that draw excess ( 4 ) from the recording layer. After heating to one particular temperature, the alloy will become crystalline when it is ( 5 ); ager heating to a higher temperature it will ( 6 ) amorphous (won’t hold its shape) when it is cooled. By ( 7 ) the temperature of the laser, crystalline areas and non-crystalline areas are formed. The crystalline areas will ( 8 ) the laser, while the other areas will ( 9 ) it. The differences will register as ( 10 ) data that can be unencoded for play back, to erase or write over recorded data, the higher temperature lase is used, which ( 11 ) in the non-crystalline form, which can when be ( 12 ) by the lower temperature laser.