Science 9: Unit 4 - Electricity MEGA QUIZ

Positive Charge: [blank_start]Not enough[blank_end] electrons compared to protons Negative Charge: [blank_start]Too many[blank_end] electrons compared to protons Neutral Charge: [blank_start]Balance of[blank_end] electrons and protons 

What is a Conductor?

What is an Insulator?

What is a Resistor?

What is a Superconductor?

What is a Semiconductor?

What are the Laws of Electrical charges?

Label the Diagram of Charge Separation:

Check all that are properties of Static electricity:

Check all that are properties of Current electricity:

Current electricity flows from [blank_start]negative to positive[blank_end].

Fill in the Blanks for Dry Cells: Use a [blank_start]paste[blank_end] electrolyte. The electrolytes mix together and create [blank_start]free electrons[blank_end]. These electrons flow through an [blank_start]electrode[blank_end] and a wire from the [blank_start]negative to positive[blank_end] terminal.

Fill in the Blanks for Wet Cells: Uses [blank_start]liquid[blank_end] electrolyte. A [blank_start]negative[blank_end] [blank_start]electrode[blank_end] soaks in the [blank_start]electrolyte[blank_end] and dissolves, which creates [blank_start]free electrons[blank_end] that flow through it over to the next [blank_start]positive[blank_end] terminal.

Primary Cells: [blank_start]Non-rechargeable[blank_end] Secondary Cells: [blank_start]Rechargeable[blank_end]

Direct Current: Current moves in [blank_start]one direction[blank_end] Alternate Current: Current moves [blank_start]back and forth[blank_end]

Check all that are Direct Current devices:

Check all that are Alternating Current devices:

Electric Circuit: A pathway used to control electricity. It flows as long as there's: forms) - There's an [blank_start]energy source[blank_end] - There's a [blank_start]complete path[blank_end]

Open Circuit: [blank_start]Doesn't make a complete loop[blank_end]; [blank_start]doesn't work[blank_end] Closed Circuit: [blank_start]Makes a complete loop[blank_end]; [blank_start]works[blank_end]

Parts of a circuit: An Energy Source: [blank_start]A battery[blank_end] A Conductor: [blank_start]A wire[blank_end] A Load: [blank_start]Something to power[blank_end]

What is Current?

What is Voltage?

What is Potential Difference?

What is Resistance?

What are the Units used for each? Current - [blank_start]Amperes[blank_end] Voltage - [blank_start]Volts[blank_end] Resistance - [blank_start]Ohms[blank_end]

Check all that are factors that would INCREASE Resistance:

Switch: Controls the flow of electrons [blank_start]but closing and opening the circuit[blank_end] Eg. [blank_start]Lightswitch[blank_end] - Off = [blank_start]Open[blank_end] - On = [blank_start]Closed[blank_end]

Rheostat(Variable Resistor): Adjusts the resistance (difficulty to flow)[blank_start]of a circuit[blank_end] Eg. Dimmer switch - [blank_start]More[blank_end] resistance = [blank_start]Less[blank_end] power = [blank_start]Dimmer[blank_end] lights

Series Circuit: A circuit that has [blank_start]all of its components in a row[blank_end] - More devices = [blank_start]More resistance[blank_end] Parallel Circuit: A circuit that has [blank_start]many paths for each component[blank_end] - More devices = [blank_start]Less resistance[blank_end]

How are the Circuits assembled below?

We use Schematic Diagrams to map out circuits.

Fill in the Blanks for Schematic Symbols:

Microcircuits use switches.

Ohms Law: As long as the [blank_start]temperature[blank_end] stays the same, the [blank_start]resistance[blank_end] is constant, and the [blank_start]current and voltage[blank_end] are [blank_start]proportional[blank_end].

Current and Voltage [blank_start]go up[blank_end] = Resistance [blank_start]goes down[blank_end]

Potential Energy: Energy [blank_start]being stored[blank_end] Kinetic Energy: Energy [blank_start]in motion[blank_end]

The energy conversions in an Incandescent Lightbulb: E[blank_start]lectric[blank_end] > H[blank_start]eat[blank_end] > L[blank_start]ight[blank_end]

Electromagnet: A wire wrapped around an iron core. It creates a [blank_start]temporary[blank_end] magnet. - The direction of current = [blank_start]Polarity[blank_end] - Amperage in the wire/ Amount of coils = [blank_start]Strength of the magnet[blank_end]

Electric Motor: Converts [blank_start]electrical[blank_end] energy into [blank_start]mechanical[blank_end] energy. Has an [blank_start]electromagnet(coil and iron core)[blank_end] rotating on an armature around [blank_start]permanent magnets[blank_end]. Every time the [blank_start]electromagnet[blank_end] rotates, a [blank_start]communitator[blank_end] switches the [blank_start]direction[blank_end] of the current, making the magnets continuously spin.

Label the Motor:

Electromagnetic Induction: Converts [blank_start]mechanical[blank_end] energy to [blank_start]electrical[blank_end] energy. The [blank_start]electromagnet[blank_end] is rotated by [blank_start]mechanical[blank_end] means with [blank_start]permanent magnets[blank_end] surrounding it. 

Label the Generator:

Law of Conservation of Energy: Energy [blank_start]cannot[blank_end] be created or destroyed, it is only converted. So no matter what, an electrical device's output energy is [blank_start]the same as[blank_end] the input because some is released as heat or light, etc.

What is Efficiency?

What is used to measure our energy usage at home?

What are some good safety points when it comes to electricity usage?

Dam: Using [blank_start]water[blank_end] to turn a turbine. [blank_start]Expensive[blank_end], [blank_start]high[blank_end] energy output. Coal: Uses [blank_start]steam[blank_end] to turn a turbine. [blank_start]Polluting[blank_end], [blank_start]high[blank_end] energy output. Nuclear: [blank_start]Splitting an atom[blank_end] to create electricity. [blank_start]Destructive[blank_end], [blank_start]high[blank_end] energy output. Solar: Converts [blank_start]sunlight[blank_end] to electricity. Takes up space, [blank_start]medium[blank_end] energy output. Wind: Uses [blank_start]wind[blank_end] to turn a turbine. Takes up space, [blank_start]high[blank_end] energy output.