I guess it's getting hotter and then it gets so hot that it burns and then turns black 'caus of heat from the volcanic area.
chemical
copper,and some precious metals, when exposed to air, turn black, like silver(completely turns black when exposed to air),gold(black spots appear),and others,maybe platinum.
Copper (Cu) is the element that turns green when exposed to moist air.
Copper wiring turns black due to oxidation. It is the air reacting with the metal. Copper wiring also sometimes turns green.
Why does an egg shell turns black when an egg is boiled in volcanic hot lakes?"
Bromine
Copper turns green because if forms a coating of copper acetate upon exposure to air and moisture
Oxide is not an element . Copper plus oxygen eaquals copper oxide .Pure copper exposed to oxygen turns greenish .
The Statue of Liberty is made out of a copper element. When copper erodes or is exposed to oxygen progressively, it turns green.
it is a chemical change because copper is one of the elements on the periodical table .
The Statue of Liberty is made out of a copper element. When copper erodes or is exposed to oxygen progressively, it turns green.
The copper wire glows red. Once it cools...the copper reacts with the air to produce copper(II) oxide. This is shown by the black tarnish on the copper wire.