what evidence is there to show that changing sand to glass is a chemical change

Sand and glass have different chemical formulas, so that means that the atoms are rearranged and this is a chemical reaction.

There is evidence that sand to glass is chemical change but it is also a physical change .

Iwould say silver and gold

Because the earth is not round ,but it may seem round when viewed from ,our planet but true some points earth is not round was an oblate spheroid -a square that it squashed as globe however is not even a perfect oblate spheroid.in fact isaac newton's first proposed that earth was not perfectly round but it was an oblate spheroid instead.that mean a square that is squashed as its poles and swollen at the