science 9: electricity
DESCRIPTION
Science 9: Electricity. Static Charge Big Idea: Static charge is produced by electron transfer. Model charging using (+,-) diagrams. Science 9: Electricity. Laws of Static Charge Opposite charges attract Like charges repel Neutral objects are attracted to charged objects Demos: - PowerPoint PPT PresentationTRANSCRIPT
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Science 9: Science 9: ElectricityElectricityStatic ChargeStatic Charge
Big Idea: Static charge is produced by electron transfer.
Model charging using (+,-) diagrams.
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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
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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
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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
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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
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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
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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
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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 …
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Science 10: MotionScience 10: MotionUniform MotionUniform Motion
Big Idea: Equal displacements in equal time intervals.
Battery powered cars are very valuable.
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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
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Science 10: MotionScience 10: MotionUniform MotionUniform Motion
The Position-time Graph Straight line Interpret motion using the graph.
Demo: Motion Sensor and software
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Science 10: MotionScience 10: MotionUniform MotionUniform Motion
The Position-time Graph Calculating Slope
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Science 10: MotionScience 10: MotionUniform MotionUniform Motion
Calculating Slope
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Science 10: MotionScience 10: MotionUniform MotionUniform Motion
Calculating Slope: 1. Choose two points on the graph
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Science 10: MotionScience 10: MotionUniform MotionUniform Motion
Calculating Slope: 2. Draw a right triangle
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Science 10: MotionScience 10: MotionUniform MotionUniform Motion
Calculating Slope: 3. Use the axes to measure rise & run
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Science 10: MotionScience 10: MotionUniform MotionUniform Motion
Calculating Slope: 3. Use the axes to measure rise & run
8 m [forward]
4 s
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Science 10: MotionScience 10: MotionUniform MotionUniform Motion
Calculating Slope: 4. slope = rise/run
8 m [forward]
4 s
Slope = 2 m/s [forward]
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Science 10: MotionScience 10: MotionUniform MotionUniform Motion
Calculating Average Velocity
Vav = Δd/ Δt
Δd = (Vav)(Δt)
Δt = Δd/ Vav
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Science 10: MotionScience 10: MotionUniform MotionUniform Motion
Simulation: This PhET simulation can be used throughout this unit.
The Moving Man
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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.
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Science 10: MotionScience 10: MotionAcceleration (non-uniform motion)Acceleration (non-uniform motion) Velocity-time graphs best represent non-uniform motion. Interpreting Velocity-time graphs
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Science 10: MotionScience 10: MotionAcceleration (non-uniform motion)Acceleration (non-uniform motion)
The slope of a velocity-time graph is average acceleration.
Calculating slopes
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Science 10: MotionScience 10: MotionAcceleration (non-uniform motion)Acceleration (non-uniform motion)
Calculating Acceleration
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Science 10: MotionScience 10: MotionAcceleration (non-uniform motion)Acceleration (non-uniform motion)
Acceleration Due to Gravity
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Science 10: MotionScience 10: MotionAcceleration (non-uniform motion)Acceleration (non-uniform motion)
SimulationsPhET
The Moving Man The Maze Game