Is bending a glass tube by heating a chemical change?
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The process of making glass involves a chemical change. ... Glass is made when sand is heated to a very high temperature, causing it to melt. The main component of sand is silicon dioxide, and when this is heated at extreme temperatures, the chemical structure of the silicon dioxide begins to rearrange!
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This burning process is a chemical change as it is a permanent change. Also, energy in the form of heat and light is evolved.
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