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Your answer is, all of the above.

Chemical Change

A chemical change occurs on the molecular level and produces a new substance. However, a physical change rearranges molecules and does not produce a new substance.

                    10 examples of chemical changes

                      Impacts of Chemical changes

Anytime a new substance is made, a chemical change takes place. Usually two or more materials are combined and a new substance is formed. A chemical change can produce amazing explosions, like fireworks.

Thus, all of the above is the correct answer. Learn more about "Chemical Changes" here

none of the above

Explanation:

deposition (gas to solid), sublimation (solid to gas), evaporation, this all is physical change not chemical change

nanotechnology is a powerful tool in biomaterials research as it creates numerous possibilities for the engineering of functional molecules. nano-bio refers to projected ability to incorporate biomimicry into various materials at nanoscale.  

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