Mr. Bradley's Earth Science

How are voltage, current, and resistance related?

How much does it cost to use electrical appliances in your home?

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Mr. Bradley's Electricity and Magnetism

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Superconductivity is a set of physical properties observed in certain materials where electrical resistance vanishes and magnetic flux fields are expelled

​Ohm's Law is a formula used to calculate the relationship between voltage, current and resistance in an electrical circuit.

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​What is Ohm's Law

Amps- Current is what flows in a circuit

Volts- Voltage measure the potential energy difference between two places in a circuit

Ohms- Resistance measures the ability to resist the flow of current

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" Your time is limited, so don't waste it living someone else's life".

-Plato

A diode is a semiconductor device that essentially acts as a one-way switch for current. It allows current to flow easily in one direction, but severely restricts current from flowing in the opposite direction.

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What is a diode?

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Superconductivity is a set of physical properties observed in certain materials where electrical resistance vanishes and magnetic flux fields are expelled

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n electronic component is any basic discrete device or physical entity in an electronic system used to affect electrons or their associated fields.

​A kilowatt-hour is a unit of energy: one kilowatt of power for one hour. In terms of SI derived units with special names, it equals 3.6 megajoules (MJ).

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Kilowatt

Multiple Choice

What is the State of Matter ?

• Liquid

• Solid

• Gas

• Solution

Multiple Select

What is the boiling point of water

• 212 F

• 300 F

• 90 F

• 400 F

Multiple Choice

Is helium a metal, nonmetal, or metalloid?

• Metal

• Metalloid

• Nonmetal

Multiple Choice

superconductor

• material with high resistance

• material with low resistance

• material with half resistance

• material with zero resistance

Multiple Choice

What does power mean?

• Joules transferred per second

• Electron flow per second

• Speed of electrons

• Electron energy

Multiple Choice

Efficiency is...

• The percentage of energy that is actually used to do work

• The stuff in the walls that keeps energy in

Multiple Choice

In energy transformations, "wasted energy" usually takes what form?

• heat

• chemical energy

• light

• sound waves

Multiple Choice

What type of energy is the energy of motion or moving?

• Mechanical

• Electric

• Chemical

• Heat

Multiple Choice

What type of energy is shown in the picture?

• Mechanical

• Electric

• Chemical

• Heat

Multiple Choice

What energy flows in current?

• Mechanical

• Electric

• Chemical

Multiple Choice

What type of energy does a battery have?

• Mechanical

• Chemical

• Electric

Multiple Choice

What type of energy is in the picture?

• Light

• Sound

• Chemical

Multiple Choice

What type of energy will you find in a radio?

• Light

• Sound

• Mechanical

• Chemical

Multiple Choice

What type of energy is the energy of motion or moving?

• Mechanical

• Electric

• Chemical

• Heat

Multiple Choice

materials that allow electricity or heat to travel through it. All METALS and Water are good examples of this.

• insulator

• conductor

• series circuit

• power source

Multiple Choice

a device that opens or closes a gap in a circuit

• switch

• load

• power source

• battery

Multiple Choice

Batteries and power plants are examples of ______________. 

• energy sources

• energy conduction

• energy transformation

Multiple Choice

All electrical devices contain electric ________________.

• acid

• gears

• circuits

• motors

Multiple Choice

Metals such as copper and aluminum are good ______________. 

• insulators

• conductors

• circuits

• charges

Multiple Choice

A circuit with only one path for the current to flow is a __________________.

• parallel circuit

• series circuit

• mini circuit

• device

Multiple Choice

Circuits often include a _____________ to control the flow of current.

• switch

• conductor

• voltage

• current

Multiple Choice

When more branches are added to a parallel circuit, ____________________.

• resistance decreases

• voltage increases

• nothing changes

Multiple Choice

_________________ found that current, voltage, and resistance are always related.

• Isaac Newton
• Albert Einstein
• Georg Ohm

Multiple Choice

Electric current moves in only one direction. 

• True

• False

Multiple Choice

What is a circuit?

• an outlet or switch

• a path which an electric current flows

• a poor conductor

Multiple Choice

A __________ is good at conducting electricity

• conductor
• resistor
• circuit

Multiple Choice

An electric bulb has ____ terminals.

• 3

• 4

• 1

• 2

Multiple Choice

If the light is on, the circuit is _________________.

• closed

• open

Multiple Choice

What type of energy is shown in the picture?

• Mechanical

• Electric

• Chemical

• Heat

Multiple Choice

What is an electric current? 

• the flow of electricity 
• electricity moving in only one direction
• a switch that gives power

Multiple Choice

What type of energy does a spinning windmill have?

• Mechanical

• Chemical

• Light

Multiple Choice

What is a switch? 

• part of the toaster that you plug into the wall
• an outlet that gives power
• part of a circuit that starts or stops the electricity

Multiple Choice

What energy flows in current?

• Mechanical

• Electric

• Chemical

Multiple Choice

Electric current moves in only one direction. 

• True
• False

Multiple Choice

What type of energy does a battery have?

• Mechanical

• Chemical

• Electric

Multiple Choice

A conductor is ____________

• something that allows electric current to flow easily
• something that limits the flow of electricity

Multiple Choice

What type of energy is in the picture?

• Light

• Sound

• Chemical

Multiple Choice

All metals conduct electricity equally well. 

• True
• False

Multiple Choice

What type of energy will you find in a radio?

• Light

• Sound

• Mechanical

• Chemical

Multiple Choice

What are filaments? 

• resistor's in the toaster's circuit
• wires that heat up when they conduct electricity
• both 

Multiple Choice

What energy always moves from a warmer to a cooler object?

• Electric

• Heat

• Light

• Sound

Multiple Choice

A __________ is good at conducting electricity

• conductor
• resistor
• circuit

Multiple Choice

What energy can you find in a campfire?

• Mechanical and chemical

• Light and Heat

• Electric and sound

• Heat and electric

Multiple Choice

A combination of two or more electric cells is called _____

• Electric circuit

• Battery

• Terminals

• None of these

Multiple Choice

Gasoline has what type of energy?

• Mechanical

• Electric

• Chemical

• Sound

Multiple Choice

An electric bulb has ____ terminals.

• 3

• 4

• 1

• 2

Multiple Choice

How does a stove transform energy?

• Mechanical to sound

• Electric to Heat

• Chemical to Mechanical

• Light to sound

Multiple Choice

_____ is an electric device which easily closes or opens an electric circuit.

• Filament

• Electric bulb

• Electric switch

• Electric cell

Multiple Choice

A remote control car that runs on batteries is having what type of energy change?

• Electric to mechanical

• Chemical to mechanical

• Light to mechanical

• Sound to mechanical

Multiple Choice

A material which does not allow the electricity to pass through it is _____

• Conductor

• Electric cell

• Insulator

• None of these

Multiple Choice

A hair dryer changes electric energy to...

• heat and sound energy

• mechanical and chemical energy

• chemical and light energy

Multiple Choice

The electric current in a closed circuit always flows from the ____ terminal of the electric cell to the _____ terminal.

• Negative to positive

• Positive to negative

• Positive to positive

• None of these

Multiple Choice

A drum uses what type of energy?

• Chemical energy

• Light energy

• Heat energy

• Sound energy

Multiple Choice

Label the circuit

• closed circuit
• complete circuit
• incomplete circuit
• working circuit

Multiple Choice

What type of energy is a stored energy?

• Chemical

• Electric

• Mechanical

• Light

Multiple Choice

A light bulb will shine brighter when

• An extra light bulb is added to the circuit
• An additional battery is added
• A smaller battery is used
• The switch is open in the circuit

Multiple Choice

What type of energy does your food have?

• Light

• Sound

• Electric

• Chemical

Multiple Choice

What energy does the sun have?

• Electric

• heat and light

• Chemical and electric

• The sun does not have energy

Multiple Choice

What energy are you using when you jump on a trampoline?

• Electric

• Mechanical

• Light

• Heat

Multiple Choice

A TV changes electric energy to

• chemical energy

• light and sound energy

• mechanical energy

• mechanical and chemical energy

Multiple Choice

Energy that flows through power lines is...

• Light energy

• Heat energy

• Chemical Energy

• Electric energy