science 9: electricity

Science 9: Science 9: ElectricityElectricityStatic ChargeStatic Charge

Big Idea: Static charge is produced by electron transfer.

Model charging using (+,-) diagrams.

Science 9: Science 9: ElectricityElectricityLaws of Static ChargeLaws of Static Charge

Opposite charges attract Like charges repel Neutral objects are attracted to charged objects

Demos: Scotch Tape Vinyl and Clear Plastic Strips

Simulations:

PhET John Travoltage Balloons and Static Electricity

Science 9: Science 9: ElectricityElectricity

Electric Potential, Current, Resistance, and Electric Potential, Current, Resistance, and EnergyEnergy

Potential Energy vs Potential Difference

Analogy: Climbing Stairs

Demo: Van de Graaff generator

and voltmeter

Science 9: Science 9: ElectricityElectricity

Electric Potential, Current, Resistance, and Electric Potential, Current, Resistance, and EnergyEnergy

Current and Energy Transfer in a Circuit

Analogy: Water Slides

Science 9: Science 9: ElectricityElectricity

Electric Potential, Current, Resistance, and Electric Potential, Current, Resistance, and EnergyEnergy

ResistanceBig Ideas:

Slows CurrentTransforms Electric Energy into other forms

Ohm’s Law calculations: V = IR I = V/R R = V/I

Science 9: Science 9: ElectricityElectricity

Series and Parallel CircuitsSeries and Parallel CircuitsBig Ideas:

Series Current remains constant Voltage changes (Vlost =Vgained) Resistance increases

Parallel Current changes (Iin = Iout) Voltage is the same Resistance decreases

Simulations: PhET Circuit Construction Kit

Science 9: Science 9: ElectricityElectricityElectric PowerElectric Power

Big Idea:Rate at which electrical energy is transformed.

For a load: Greater the power rating More current Less resistance

Calculations:P = VIE = Pt

Science 10: MotionScience 10: MotionAn Introductory activity, for this unit, is An Introductory activity, for this unit, is important!important!

Allows students to “draw” on previous learning.Allows students to “draw” on previous learning.

Suggestions:Suggestions: Think Fast Activity page 341 BC Sc10Think Fast Activity page 341 BC Sc10 Jumping off a tableJumping off a table

Knees bentKnees bent Locked kneesLocked knees Different heightsDifferent heights

Many others …Many others …

Science 10: MotionScience 10: MotionUniform MotionUniform Motion

Big Idea: Equal displacements in equal time intervals.

Battery powered cars are very valuable.

Science 10: MotionScience 10: MotionUniform MotionUniform Motion

Vectors Magnitude and a direction Opposite directions have opposite signs Must be able to find the “change in” a vector quantity

Science 10: MotionScience 10: MotionUniform MotionUniform Motion

The Position-time Graph Straight line Interpret motion using the graph.

Demo: Motion Sensor and software

Science 10: MotionScience 10: MotionUniform MotionUniform Motion

The Position-time Graph Calculating Slope

Science 10: MotionScience 10: MotionUniform MotionUniform Motion

Calculating Slope

Science 10: MotionScience 10: MotionUniform MotionUniform Motion

Calculating Slope: 1. Choose two points on the graph

Science 10: MotionScience 10: MotionUniform MotionUniform Motion

Calculating Slope: 2. Draw a right triangle

Science 10: MotionScience 10: MotionUniform MotionUniform Motion

Calculating Slope: 3. Use the axes to measure rise & run

Science 10: MotionScience 10: MotionUniform MotionUniform Motion

Calculating Slope: 3. Use the axes to measure rise & run

8 m [forward]

4 s

Science 10: MotionScience 10: MotionUniform MotionUniform Motion

Calculating Slope: 4. slope = rise/run

8 m [forward]

4 s

Slope = 2 m/s [forward]

Science 10: MotionScience 10: MotionUniform MotionUniform Motion

Calculating Average Velocity

Vav = Δd/ Δt

Δd = (Vav)(Δt)

Δt = Δd/ Vav

Science 10: MotionScience 10: MotionUniform MotionUniform Motion

Simulation: This PhET simulation can be used throughout this unit.

The Moving Man

Science 10: MotionScience 10: MotionAcceleration (non-uniform motion)Acceleration (non-uniform motion)

The Rate of Change in VelocityBig Idea:

How quickly you change your velocity (Δt ) and the magnitude of change in velocity are both factors in an object’s acceleration.

Eg. Having a smaller change in velocity and increasing the time to change velocity decreases the acceleration.

Science 10: MotionScience 10: MotionAcceleration (non-uniform motion)Acceleration (non-uniform motion) Velocity-time graphs best represent non-uniform motion. Interpreting Velocity-time graphs

Science 10: MotionScience 10: MotionAcceleration (non-uniform motion)Acceleration (non-uniform motion)

The slope of a velocity-time graph is average acceleration.

Calculating slopes

Science 10: MotionScience 10: MotionAcceleration (non-uniform motion)Acceleration (non-uniform motion)

Calculating Acceleration

Science 10: MotionScience 10: MotionAcceleration (non-uniform motion)Acceleration (non-uniform motion)

Acceleration Due to Gravity

Science 10: MotionScience 10: MotionAcceleration (non-uniform motion)Acceleration (non-uniform motion)

SimulationsPhET

The Moving Man The Maze Game