Electricity & MagnetismElectricity

Beginning Task:

Trade Science Fair Assignment #4 with your partner

Use the Peer Review Form to provide feedback to your partner describing how they can improve their procedure.

Return Peer Review Form and Rough Draft to your partnerREAD THEIR FEEDBACK ask questions if you have them

(15 minutes)

Entry Task:

What is electricity?

How does a light switch turn the lights on and off?

What is Electricity? Electrons Moving

Let there be LIGHT!

Use the materials provided to light up the bulb.

What did you have to do to light the bulb?

Simple Circuit• Source of electrical

potential

• Conductive path

• An object that uses electricity to do work (a resistor)

Let there be LIGHT, LIGHT!

Can you light more than one bulb with the same battery?

One Way

In “Series”- Several components

one after the other

- Connected so an individual charge will pass through each component.

Another Way

In “Parallel”

- Again, several components- Connected so that a single

charge will pass through only one of the components

Build both circuits and compare

How does the brightness of the bulbs compare?

What happens when one bulb “breaks” (unscrew or use “faulty bulb”)

Tollbooth Analogy

Tollbooth Analogy

In series, electrons must move through two tollbooths • Slows progress (more resistance)• If one closes, no cars move through the other either (charge cannot

flow)

In parallel, electrons move through just one tollbooth & have choices!

• Speeds progress (less resistance)• If one closes, cars move through the other (charge still flows)

Homework:• Complete Final Draft of Science Fair Assignment #4 Due 12/10