DAY 91

WARM-UP (4 minutes)

1. What flows in a wire, positive or negative charges?

2. Look up a parallel circuit and a series circuit. Which did you create when you lit both bulbs?

3. What happened to the brightness of the bulbs when you lit both (AKA, compare the brightness when there was just one bulb, with two bulbs)

CLASSWORK

1. HW Review

2. Complete 090A and 090B: ~15 minutes

090A: Creating a Circuit (part 1)

• You can work by yourself, or with one partner.
• You'll get a single wire, 1.5V bulb, and 1.5V AA battery.
• Your job: discover at least four different ways to complete a circuit
• Procedure:
• 1. Predict a configuration of the materials that you think might light the bulb. (need ideas? LINK)
• 2. Test your configuration.
• 3. Using the Observation Form (see board), record a diagram of your prediction and whether or not the bulb lit.
• 4. Make and record other quantitative and qualitative observations (AKA, say why it .
• 5. Repeat steps 1–4 until you have identified at least 4 different ways the bulb will light and 6 different ways the bulb will not light.

090B: Creating a More Advanced Circuit (part 2)

• RULE: ONLY USE ONE BATTERY
• You will now combine materials with another person/group. That means you can use two bulbs, and up to two wires, but ONLY ONE BATTERY (more could overload the bulb, just like the LED yesterday, and I don't have any extra bulbs).
• just like in #090A, create three configurations that light BOTH BULBS. Diagram them, as well as three configurations which don't work, and make observations.

091A: Advanced Circuits & Components

• What's a switch? What's a resistor? Capacitor? Transistor?
• You likely know some of these terms, but not all.
• We'll spend our last four days of class using, and learning about, the major components of circuit.
• Things you'll do:
  • create real circuits that make lights flash, make sounds, etc.
  • diagram circuits using symbols
  • research circuit components, and describe their function
  • discuss what you've learned
• Assignment: Learn about circuits components, and how they work, by completing "Switch On!" mini-labs
• Assessment: You'll create two documents, both of which will be multiple pages long:
  • 1. Lab Summary Doc (3 columns) : Mini-Lab Title; Circuit Diagram (AKA schematic); Concepts Illustrated in Lab
  • 2. Circuit Components (4 columns): Component Name; Symbol; Function (what it does); How Does It Work?
• Groups: 3-5 students per kit, depending on class size

HOMEWORK:

Activity 090A and 090B are due Friday.