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Science 9: Electricity

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:

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Science 9: Electricity

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  1. Science 9: Electricity Static Charge Big Idea: Static charge is produced by electron transfer. Model charging using (+,-) diagrams.

  2. 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

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

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

  5. 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

  6. 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

  7. Science 9: Electricity 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

  8. 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 …

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

  10. 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

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

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

  13. Science 10: Motion Uniform Motion Calculating Slope

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

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

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

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

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

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

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

  21. 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.

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

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

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

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

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

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