Virginia’s blue ridge mountains were once among the tallest in the world, similar in altitude to the himalayas of today. this would still be the case if not for the process of a) erosion. b) folding. c) volcanism. d) metamorphism.

A) Erosion is the answer, i checked on USATP

electron microscopy and scanning tunneling microscopes gives us a greater understanding of atoms by being able to see the atom itself, and lets us see some atomic reactions.

explanation:

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.