Materials used table or desk
drum and drumsticks
laser pen
clothespin or binder clip (optional
lab stand and clamp
mirror or felxiable mirror
tape
large rock about 8 cm across
smaller rock
video camera to record(slow minton optional
graph paper
masking tape

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).

Precipitate, and gas