Model charging using (+,-) diagrams.

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Presentation transcript:

Model charging using (+,-) diagrams. 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: Scotch Tape Vinyl and Clear Plastic Strips Simulations: PhET John Travoltage Balloons and Static Electricity

Science 9: Electricity and voltmeter Electric Potential, Current, Resistance, and Energy Potential Energy vs Potential Difference Analogy: Climbing Stairs Demo: Van de Graaff generator and voltmeter

Science 9: Electricity Electric Potential, Current, Resistance, and Energy Current and Energy Transfer in a Circuit Analogy: Water Slides

Science 9: Electricity Electric Potential, Current, Resistance, and Energy Resistance Big Ideas: Slows Current Transforms Electric Energy into other forms Ohm’s Law calculations: V = IR I = V/R R = V/I

Science 9: Electricity Series and Parallel Circuits Big 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: Electricity Big Idea: Electric Power Big Idea: Rate at which electrical energy is transformed. For a load: Greater the power rating More current Less resistance Calculations: P = VI E = Pt

Science 10: Motion An Introductory activity, for this unit, is important! Allows students to “draw” on previous learning. Suggestions: Think Fast Activity page 341 BC Sc10 Jumping off a table Knees bent Locked knees Different heights Many others …

Science 10: Motion Uniform Motion Big Idea: Equal displacements in equal time intervals. Battery powered cars are very valuable.

Science 10: Motion Uniform Motion Vectors Magnitude and a direction Opposite directions have opposite signs Must be able to find the “change in” a vector quantity

Demo: Motion Sensor and software Science 10: Motion Uniform Motion The Position-time Graph Straight line Interpret motion using the graph. Demo: Motion Sensor and software

Uniform Motion The Position-time Graph Calculating Slope Science 10: Motion Uniform Motion The Position-time Graph Calculating Slope

Uniform Motion Calculating Slope Science 10: Motion Uniform Motion Calculating Slope

Uniform Motion Calculating Slope: 1. Choose two points on the graph Science 10: Motion Uniform Motion Calculating Slope: 1. Choose two points on the graph

Uniform Motion Calculating Slope: 2. Draw a right triangle Science 10: Motion Uniform Motion Calculating Slope: 2. Draw a right triangle

Science 10: Motion Uniform Motion Calculating Slope: 3. Use the axes to measure rise & run

Science 10: Motion Uniform Motion Calculating Slope: 3. Use the axes to measure rise & run 8 m [forward] 4 s

Uniform Motion Calculating Slope: 4. slope = rise/run Science 10: Motion Uniform Motion Calculating Slope: 4. slope = rise/run 8 m [forward] 4 s Slope = 2 m/s [forward]

Science 10: Motion Uniform Motion Vav = Δd/ Δt Δd = (Vav)(Δt) Calculating Average Velocity Vav = Δd/ Δt Δd = (Vav)(Δt) Δt = Δd/ Vav

Science 10: Motion Uniform Motion The Moving Man Simulation: This PhET simulation can be used throughout this unit. The Moving Man

Acceleration (non-uniform motion) Science 10: Motion Acceleration (non-uniform motion) The Rate of Change in Velocity Big 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.

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

Acceleration (non-uniform motion) Science 10: Motion Acceleration (non-uniform motion) The slope of a velocity-time graph is average acceleration. Calculating slopes

Acceleration (non-uniform motion) Calculating Acceleration Science 10: Motion Acceleration (non-uniform motion) Calculating Acceleration

Acceleration (non-uniform motion) Acceleration Due to Gravity Science 10: Motion Acceleration (non-uniform motion) Acceleration Due to Gravity

Acceleration (non-uniform motion) Science 10: Motion Acceleration (non-uniform motion) Simulations PhET The Moving Man The Maze Game