1. OBJ: Given notes, activity sheet SWBAT explain voltage, resistance and four factors that affect resistance with 70% accuracy DN: Watch Electricity Video ACT: Introduction to voltage, voltage sources, resistance and factors affecting resistance iPad (eSpark) Textbook, read p ; Complete Electric Current Booklet (HW check tomorrow) HW: Text, read p ; Complete Electric Current Booklet; Work on Quarter 2 Study Guide; Interim Exam, Jan 22.

2. Lesson Notes
Conductors: materials that allow electrons to flow (move). Examples: metals, water, acids
Insulators: materials that do not allow electrons to flow. Examples: rubber, glass, rock, plastic, wood, fabric, ceramic, paper.

3. Conductors
Metals
Water
Acids

4. Insulators
Rubber
Rubber Tires
Plastic
Glass
Glass
Ceramic

5. Lesson Notes
Voltage (Volt, V): “difference in electrical potential energy between two places in a circuit”. Example: roller coaster
High Potential Energy
electron
difference
Voltage
Low Potential Energy

6. Lesson Notes
Voltage: total amount of pushing force by electrons (electric current).
Voltage Sources: device that creates a potential energy difference in a circuit. Example: battery, generator, solar cell

7. Lesson Notes Factors Affecting Resistance:
Resistance (ohm, Ω): measure of how difficult it is for electrons to flow through a material.
More resistance ~ less current (amps)
Less resistance ~ more current (amps)
Factors Affecting Resistance:
Material of the wire (conductors vs. insulators)
Wire Length (see transparancy)
Wire Diameter
Wire Temperature

8. Factors Affecting Resistance