In class, we've been working on series and parallel circuits using multiple lightbulbs and d-cells. We soon will begin some exploration of electromagnets, examining how the number of winds of the wire of an electromagnet affects it's strength. We'll also discuss the uses of electromagnets in engineering many of the gadgets we use every day!
- What are the differences between parallel and series circuits? (Parallel circuits allow for multiple pathways of electricity, which results in more electricity going towards the bulb or motor. Series circuits require that multiple bulbs/motors share a pathway, which means the bulbs are dimmer or the motors go slower. For reference, the bulbs in your house are on a parallel circuit - they can be bright at the same time, and if one goes out, they don't all go out! By comparison, those old Christmas lights are on a series circuit where if one bulb goes out, none of them work. )
- What is an electromagnet? (One can induce magnetism in an iron object by wrapping a wire around it and hooking it up to a electricity source. We used a iron needle-like thing hooked to a battery to pick up washers.)
- What is the advantage of an electromagnet? What are they used for in every day life? (Electromagnets can be turned on and off, unlike permanent magnets. They are used in everything from doorbells to junk yards to many electronics.)
On another note, quizzes will be going home early next week. If you have any questions about my grading system or report cards, PLEASE let me know. I know having multiple teachers is a transition for you and your kids - I want to make sure kids feel supported and prepared to be advocates for their own learning as they approach middle school and have even more teachers, grading systems, etc.
