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



Current and Energy Transfer in a Circuit

Analogy: Water Slides



ResistanceBig Ideas:

Slows CurrentTransforms Electric Energy into other forms

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


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.


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


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

Demo: Motion Sensor and software


The Position-time Graph Calculating Slope


Calculating Slope


Calculating Slope: 1. Choose two points on the graph


Calculating Slope: 2. Draw a right triangle


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


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

8 m [forward]

4 s


Calculating Slope: 4. slope = rise/run

8 m [forward]

4 s

Slope = 2 m/s [forward]


Calculating Average Velocity

Vav = Δd/ Δt

Δd = (Vav)(Δt)

Δt = Δd/ Vav


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


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

Calculating slopes


Calculating Acceleration


Acceleration Due to Gravity


SimulationsPhET

The Moving Man The Maze Game

science 9: electricity

Documents

motionuniform motionsimulation

motion sensor

motionuniform motionbig

static electricity science

electricityelectric

magnitude of change

series current

smaller change