Question

Observation of the aluminum foil

Answer 1

$\huge\red{\boxed{\bold{Answer}}}$

The observations indicate that the aluminum foil burned as opposed to melted. The fact that the aluminum foil became brittle indicates that the aluminum foil lost it's properties as aluminum foil, and therefore had to be a completely different substance.

$\huge\mathbb\blue{THANK\:YUH!}$