Electricity and Magnetism Welcome to Physics Electricity and Magnetism

Warm Up: page 18 Draw a circuit made up of: A light bulb Two wires A battery What two things must be true in order to make a functioning circuit? 8 minutes

Agenda: summarize in planner Finish “Investigating Electricity” Cornell Notes: Measuring Electricity Exit Ticket This Thursday you need to come in to finish the test if you have not already!

Learning Targets I can build a battery using household materials, and explain how my battery works I can describe how electrically charged objects interact I can identify the difference between conductors and insulators I can identify the two necessary requirements of an electric circuit

Writing and Reading Discussion Group Work Instruction Quiet Focused Active listening On Topic Ask Questions Group Work Focus on topic Fulfill Roles Lean in Instruction Listen Take notes Raise hands

Investigating Electricity: part 2 Checkpoint 4 Finish the activity Complete each activity, and answer the questions Make sure you have the “model building questions” answered WHEN DONE : repack kit and return to the front table 25 minutes

Investigating Electricity: discussion Checkpoint 4 Something was happening in the wires of the “basic closed loop.” What was the evidence? Something was moving in the wires. What do you think it was? Was that something always moving in the same direction? What evidence supports your answer?

Cornell Notes: page 21 Topic: Measuring Electricity Essential Questions: What can you measure in a circuit? What do those measurements tell you?

Measuring Electricity Electricity: movement of charge through a circuit Form of kinetic energy Charge carrier: electron Moving charge does work: powers motors, light bulbs, cell phones, etc. Three ways to measure charge in circuits: Voltage: difference in charge between two points Current: the strength/speed of the moving charge Resistance: how hard it is for charge to move Electric Circuits require a closed loop of conducting materials, and a source of power. If those two things are present, charge can move through a circuit. This raises further questions: where does the charge come from? Why does it move? What affects how it moves? What can we measure about the movement of charge?

Batteries (all sources of voltage): do work to separate positive and negative charges, and create the “difference in charge” that voltage is a measure of. Analogous to lifting a rock into the air---the Earth’s gravity

Voltage is like: Current is like: Resistance is like: The water pressure in the tank How fast the water is coming out of the pipe How hard it is for the water to get through the pipes

High Voltage Low Voltage

High Current Low Current

High Resistance Low Resistance

Measuring Electricity Continued Voltage: how much work can be done Unit: volts 1 volt = 1 joule per coulomb Current: how fast the work will get done Unit: amperes (amps) 1 amp = 1 coulomb per second Resistance: how much energy is lost or removed Unit: ohms

Repetitions Chunk your notes Highlight each new science word. Turn supporting targets d and e into questions. At least 4 questions! Write the questions in the question column next to to where the answers are found in the notes WHEN DONE: Go to crockphysics.weebly.com On the “Electricity and Magnetism” page, watch the “What is Voltage?” video.

Exit Ticket A charged plastic rod pulls a can across a table. What does that tell you about the electrical charge of the two objects? What is the difference between a conductor and an insulator? What measurement describes the difference in charge between two points in a circuit? What

Clean Up Chromebooks returned and plugged in to the correct slot Name tags turned in Check for Understanding in box Notebooks in backpack Stay in your seat until the bell rings