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Electricity - Change and Test It!

Look closely at the diagrams below. Each has the parts needed to create a simple circuit. Try to find the same materials to test and see what changes may happen in your test.

Try it!
Objects you might test include Christmas light bulbs and electric motors. Obtain permission from an adult before testing any other electric items.

Connect the positive end of the battery (+) to the red wire shown in the diagram. Then connect the negative end of the battery (-) to the blue wire shown in the diagram. Notice what happens when both wires are connected to the battery.

Now switch the wires! Connect the positive end of the battery (+) to the blue wire shown in the diagram. Then connect the negative end of the battery (-) to the red wire shown in the diagram. Observe what happens when both wires are connected this way to the battery. How is it the same, or different than when the wires were connected to the other end of the battery?

Predict it!
What do you think will happen if you change from a simple 1.5 volt battery to a larger battery? Try it with a 9 volt battery? Did everything work the same way as with the 1.5 volt battery? How was this test similar or different from the earlier tests?

What do you think would happen if you connect more than one item to the battery? Try connecting both the bell and the light at the same time? Was it what you expected? How does the voltage of a battery affect the number of items that can be connected to it?

utah state board of education This Sci-ber Text was developed by the Utah State Board of Education and Utah educators.