Hi everyone,

For the past few days, we have been using multimeters. Multimeters measure voltage. If you have never seen a multimeter, it is the sie of a big calculator and has dials on it. The red wire is positive and the black wire is negative. When you plug both wires into the multimeter you take the red one and place it on top of the positive side of the battery and you take the black one and place it on top of the positive side. Before this, you look at the battery or lightbulb or anything else and check the voltage of it. For example, if the voltage is 9 then you move the dial to 20 because the number is under twenty or you move it to ten because it is under ten. You need to move the dial to the closest number over 9. Once you do this the multimeter says a number which is your voltage. Even though the battery says 9v that is before you used it, but after you used it you have less voltage on the battery and with a multimeter, you can check that.

here is a photo of a multimeter.