Throughout, make sure you have a copy of the Student Guide and your data table. 3 test tubes. The first has yellow material in it, with gray residue at the bottom. The second is filled with blue liquid, has a stick or wire extending up from gray material at the bottom. The third has clouds of gas, with a gray residue at the bottom. Also shown is a piece of wire in a burner flame.

In this experiment, you made observations of the
and the
.
You used these observations to write the
and
.