A shiny silver colored strip of metal is heated in a hot flame.It turns powdery and white.When the flame is removed and the strip cools it remains powdery white.What can you conclude from these observations?
A)All metals oxidize with heat
B)The metal strip has undergone a physical change
C)All physical changes require heat
D)The strip has undergone a chemical change

Question

Quizplus · Accepted Answer

The fact that the metal strip turned powdery and white when heated and that it remained in that state after cooling suggests that a chemical change occurred. This change could be due to oxidation or some other chemical reaction, but it is clear that the original substance was transformed into something new, which is indicative of a chemical change.

A Shiny Silver Colored Strip of Metal Is Heated in a Hot