Circuits and Magnestism Flashcards
An electric circuit contains a _________ source
Energy
A _________ is often used as a energy source.
Battery
As chemicals react within a battery, the battery’s ________ terminal loses electrons, and its _______ terminal gains electrons.
Positive
Negative
When the terminals are connected in a closed circuit, electrons flow from the _________ terminal of a battery to the __________ terminal.
Negative
Positive
An electric circuit contains at least one electric _________ that transforms energy.
Device
Within a battery, _______ energy transforms into ________ into moving electrons.
Chemical
Kinetic
When electrons flowing in a conductor ________ with the atoms that make up the conductor, the electrons transform some of their __________ energy to the atoms.
Collide
Kinetic
An electric circuit contains _____ that connect its components.
Wires
Wires that connect its components of a circuit have ____ electric resistance.
Low
Only a small amount of electric energy is transformed into _______ energy by wires, which means that more energy is available for useful devices in the circuits.
Thermal
A(n) _________ is a enteric circuit that has only one closed path for an electric current to follow.
Series
Because there is only one path, when a series circuit is _______, all ________ turn off.
Open
Devices
Adding devices to a series circuit adds ______________ to the circuit and ____________ the current in the circuit.
Resistance
Decreases
A(n) __________ circuit is an electric circuit that has more than one closed path for an electric current to follow.
Parallel
Most circuits in homes are __________ circuits.
Parallel
In a parallel circuit, each ________ as its own path, or ________, that connects it to the source.
Device
Branch
If you _____ one branch of a parallel circuit, the current continues through other branches.
Open
Adding devices and branches to a parallel circuit __________ the total electric current through the __________.
Increases
Battery
Electric energy is generated at large __________ _________.
Power plants
Before entering your house through a main _____ passes through a(n) ____________ _________ which measures the __________ _________ used in your home.
Wire
Electric meter
Electric energy
_______ and circuit __________ are safety devices that keep the _________ from becoming to high.
Fuses
Breakers
Current
An electric circuit transforms _________ energy of other forms of energy
Electric
A(n) _______ is a safety device in an electric outlet that opens a circuit to stop current flow, which can help protect you from electric _______.
GFCI
Shock
An electric shock occurs when a(n) _________ _______ passes through the _________ _______.
Electric current
Human body
Ways to protect yourself from electric shock include staying away from _______ while using electric devices, avoiding using _______________ cords, and not contacting electric power _______.
Water
Extension
Lines
A(n) _________ is an object that attracts the metal iron.
Magnet
Magnets are in many _______ and sizes.
Shapes
A(n) _________ _____ is a place on a magnet where the force it exerts is the strongest. Every magnet has _____ magnetic poles.
Magnetic pole
Two
Any two magnets exert ______ on each other.
Forces
Similar magnetic poles ______ each other, and opposite poles _______.
Repel
Attract
The magnetic force becomes __________ as magnets move closer together and _________ as they move farther apart.
Stronger
Weaker
Magnets can attract or repel each other even if they aren’t _________ because a(n) __________ _______ surrounds all magnets
Touching
Magnetic field
Magnetic field lines have __________. The lines start at the ______ pole and end at the _______ pole.
Direction
North
South
The lines are closer together at the magnet’s ________.
Poles
The magnetic force is _________ where the lines are closest together.
Stronger
When two bar magnets are brought together, the two magnetic fields __________.
Combine
Earth is surrounded by a(n) _________ ______ due to _____ and nickel in Earth’s ______ _____.
Magnetic Field
Iron
Outer core
A(n) __________ needle always aligns with the magnetic _______ ______ of a magnet.
Compass
Field Lines
Earth’s magnetic field protects Earth from charged _________ from the ____.
Particles
Sun
Sometimes large numbers of _________ from the ____ collect near the Earth’s magnetic poles.
Particles
Sun
The particles collide with atoms of gases, causing the atmosphere to ______, forming shimmering sheets of color called _______.
Glow
Auroras
A(n) __________ _______is any material that is strongly attracted to a magnet.
Magnetic field
____________________ elements are elements hat have an especially strong attraction to magnets.
Ferromagnetic
If the magnetic fields of the atom point in different directions, the magnetic fields _______ each other out, and the object is not a(n) __________.
Cancel
Magnet
In magnetic material, atoms form groups, or magnetic _________.
Domains
Within a domain, the __________ _____ of individual atoms point in the same direction.
Magnetic Field
All of fields these atoms combine and form a magnetic _____ around the entire domain.
Field
If the magnetic domains line up, their magnetic fields __________ with each other and the object is a(n) ________.
Combine
Magnet
When a magnet comes near a magnetic material, the magnetic field around the magnet applies a force that causes the ____________ ________ in the material to align, magnetizing it.
Magnetic Domains
A(n) __________ magnet quickly loses its magnetism after being removed from a magnetic field.
Temporary
A magnet that remains a magnet after being removed from a magnetic field is a(n) _____________ magnet.
Permanent
