Watch your teacher to learn how to properly use a multimeter. You need to make sure that your multimeter is properly set up before measuring current in your circuit, so you don't blow your multimeter.
When your teacher has finished the demonstration, set up a circuit with your wires, battery, multimeter, and one of your materials to test.
Once you have set up your circuit, measure the current produced by each material and record your data. When you are finished with your investigation, answer the questions below