Let’s see how much you’ve picked up with these experiments and the reading – answer as best as you can. (No peeking at the answers until you’re done!) Just relax and see what jumps to mind when you read the question. You can also print these out and jot down your answers in your science notebook.

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Circuits & Components Exercises

1. LED stands for “Light Emitting Diode”. Does it matter which way you wire it up in a circuit? Does the longer wire on the LED connect to plus (red) or minus (black)?

2. Do you need to hook up batteries to make the neon lamp light up? What are 2 different ways you can make the neon lamp light up?

3. If you want to reverse the spin direction of a motor without using a switch, what can you do?

4. A simple switch can be made out of what kinds of materials?

5. Name six materials that are electrically conductive.

6. What’s the difference between a light bulb and your LED?

7. What happens when you rub your head with an inflated balloon? Which charge is where?

8. Why do electrical charges move in a circuit?

9. What makes lightning?

10. What’s the charge of an electron?

11. What happens when you split an electron open?

Need answers?

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