## Saturday, 30 August 2014

### HARMONIC MOTION TERMINOLOGY

HARMONIC MOTION
Select the correct term to complete the sentences.

oscillators
frequency
natural frequency
damping
amplitude
phase
resonance
hertz
restoring force
harmonic motion
cycle
period
vibration

1. Frequency is measured in ____.
2. A ____ is the building block of harmonic motion and has a beginning
and an end.
3. The time it takes for one cycle is called the ____.
4. Motion that repeats itself over and over is called ____.
5. The number of cycles an oscillator makes per second is called the
____.
6. A pendulum, an atom, and the solar system are all examples of ____.
7. ____ describes the size of a cycle.
8. Swinging motion (back and forth motion that repeats) is an example
of a ____.
10. The ____ of an oscillator describes where it is in the cycle.
11. When the frequency of a periodic force matches the natural frequency
of the oscillating system, ____ occurs.
12. A guitar is tuned by adjusting the ____ of the vibrating string to
match a musical note.
13. The ____ is a force that always acts to pull an oscillator back toward
the center position.

### FIELDS AND FORCES TERMINOLOGY

FIELDS AND FORCES

Select the correct term to complete the sentences.
shielding
force field
inverse square law
intensity
gravitational field
source charge
field
test charge
electric field

1. A quantity that has a value at every point in space is a _____.
2. _____ is a measure of power per area.
3. If two quantities are related by a(n) _____, as one increases the other
rapidly decreases.
4. Any object with mass creates a _____.
5. A _____ creates a force on any object placed in it that is sensitive to
the force.
6. The _____ points away from positive charges and toward negative
charges.
7. Conductors have a _____ effect that causes the electric field inside a
conductor to be zero.
8. A _____ creates an electric field.
9. It is helpful to imagine a positive _____ when drawing electric field
lines.

### ELECTROMAGNETIC INDUCTION TERMINOLOGY

ELECTROMAGNECTICINDUCTION
Select the correct term to complete the sentences.

electric generator
electric motor
armature
brushes
electromagnetic induction
transformer
rotor
solenoid
commutator
coil

1. A wire looped into a circular _____ can be used to create a magnetic
field that is stronger than that of a single wire.
2. A coil with many turns called a _____ is a device commonly used in
speakers, motors, and many other devices.
3. A(n) _____ is used to convert electrical energy into mechanical
energy.
4. A _____ is used in a motor to switch the direction of the magnetic
field created by the current.
5. The rotating part of a motor that holds the electromagnets is called the
_____.
6. Electric current passes through the _____ and into the electromagnets
in an electric motor.
7. A(n) _____ is used to convert mechanical energy into electrical
energy.
8. Using a magnet to create electric current in a wire is called _____.
9. _____ explains the relationship between the current created in a coil
and the rate of change of the magnetic field through the coil.
10. A _____ uses two coils to change the voltage of the electricity

### MAGNETISM TERMINOLOGY

MAGNETISM

Select the correct term to complete the sentences.

electromagnet
right-hand rule
compass
soft magnet
gauss
magnetic field
magnetic domains
magnetic declination
permanent magnet
magnetic poles
diamagnetic
paramagnetic
ferromagnetic

1. A _____ keeps its magnetic properties even when it is not near other
magnets.
2. Every magnet has two _____.
3. A _____ is present in the region around a magnet.
4. A(n) _____ is a magnet created by electric current in a wire.
5. You can use the _____ to figure out the locations of an
electromagnet’s poles.
6. A material that is _____ has the same number of electrons spinning in
each direction, so there is no overall magnetic field.
7. In ferromagnetic materials, groups of atoms with the same magnetic
alignment create _____.
8. _____ materials such as iron can create permanent magnets.
9. _____ materials are very weakly magnetic because electrons are
randomly arranged.
10. A _____ quickly loses its magnetism when taken out of a magnetic
field.
11. The _____ is a unit used to measure the strength of magnetic fields.
12. A _____ is simply a permanent magnet that is free to spin.
13. The difference between the way a compass points and the direction of
true north is called _____.

### ELECTRICAL CHARGES AND FORCES TERMINOLOGY

ELECTRICAL CHARGES AND FORCES

Select the correct term to complete the sentences.

electric field
electrically neutral
electroscope
coulomb
field lines
friction
induction
polarized
capacitor
static electricity
Coulomb’s law

1. The unit in which charge is measured is the _____.
2. An object is _____ when it has equal numbers of positive and
negative charges.
3. _____ exists when there is an excess of one type of charge on an
object.
4. _____ explains the relationship between electric force, charge, and
distance.
5. Charging by _____ occurs when clothes brush against each other in
the dryer.
6. A(n) _____ can be used to tell whether an object has a net charge.
7. If you use a charged balloon to charge a metal ball through _____, the
balloon’s net charge does not change.
8. _____ are drawn to show the direction of the electric field.
9. An object is _____ if has a net positive charge on one side and a net
negative charge on the other side.
10. There is a(n) _____ in the region around any charge.
11. A _____ is used to store electrical energy by separating charge.
12. Capacitance is measured in _____.

### ELECTRICAL SYSTEMS TERMINOLOGY

ELECTRICAL SYSTEMS

Select the correct term to complete the sentences.

horsepower
transformer
Kirchhoff’s current law
alternating
kilowatt-hour
series circuit
direct
kilowatt
electrical power
short circuit
Kirchhoff’s voltage law
voltage drop

1. A _____ contains only one path for the current.
2. According to _____, if a circuit contains a 3-volt battery, the voltage
drops around the complete circuit must add to 3 volts.
3. There is a _____ across each resistor in a circuit when current is
4. _____ states that all the current entering a point in a circuit must also
leave that point.
5. A _____ is created when a circuit contains one branch with very little
or no resistance.
6. A _____ contains multiple paths or branches for the current.
7. One _____ equals 1000 watts.
8. The rate of converting electrical energy into another form of energy is
called _____.
9. The _____ is a unit used by electric utility companies to measure the
electrical energy your home uses each month.
10. One _____ is equal to 746 watts.
11. A battery creates _____ current.
12. Electrical appliances in your home use _____ current.
13. A _____ converts high-voltage electricity to lower voltage electricity

### ELECTRIC CIRCUITS TERMINOLOGY

ELECTRIC CIRCUITS
Select the correct term to complete the sentences.
ohm
closed circuit
resistance
ampere
switch
electric current
voltage
potentiometer
resistor
volt
conductor
electrical symbols
battery
Ohm’s law
open circuit
1. _____ is what flows and carries power in a circuit.
2. _____ are used when drawing circuit diagrams.
3. A _____ is used to create a break in a circuit.
4. A(n) _____ has a break it, so there is no current.
5. A _____ has a complete path for the current and contains no breaks.
6. A light bulb, motor, or speaker acts as a _____ in a circuit.
7. The unit for current is the _____.
8. A _____ provides voltage to a circuit.
9. _____ is the difference in the amount of energy carried by current at
two points in a circuit.
10. The _____ is the unit for measuring voltage.
11. The _____ is the unit for measuring resistance.
12. _____ explains the relationship between current, voltage, and
resistance in a circuit.
13. _____ is the measure of how strongly a material resists current.
14. A _____ has a resistance that can be changed.
15. Wires in a circuit are made of a material that is a _____, such as
copper.

### RELATIVITY TERMINOLOGY

RELATIVITY

Select the correct term to complete the sentences.

speed of light
reference frame
black hole
general relativity
big bang
special relativity
antimatter
time dilation

1. Every particle of matter has a(n) ____ twin.
2. ____ is equal to 3 × 108 meters per second.
3. ____ is a theory that describes what happens to matter, energy, time,
and space at speeds close to the speed of light.
4. An effect known as ____ causes time to move more slowly for an
object in motion than for one at rest.
5. According to ____ the force we call gravity is an effect created by the
curvature of space and time.
6. The perspective of an observer from which the position and motion of
a system can be described is called a(n) ____.
7. A(n) ____ is an object with such a strong gravity that its escape
velocity equals the speed of light.
8. According to the ____, the universe was once smaller than an atom
and began to expand after a huge explosion.

### CHANGES IN MATTER TERMINOLOGY

CHANGES IN MATTER
Select the correct term to complete the sentences.
ion
chemical reaction
chain reaction
activation energy
exothermic
covalent
half-life
beta decay
endothermic
reactant
ionic
nuclear reaction
alpha decay
gamma decay
product

1. Electrons in a(n) ____ bond are transferred from one atom to another.
2. Electrons in a(n) ____ bond are shared between atoms.
3. An atom that loses or gains an electron is called a(n) ____.
4. Mixing baking soda and vinegar is an example of a(n) ____.
5. A chemical reaction that gets hot is ____.
6. In a chemical reaction, you start with ____ that are combined to make
____.
7. A chemical reaction that gets colder is ____.
8. To make water from hydrogen and oxygen, a spark provides the ____
needed to make the reaction happen.
9. ____ can change one element into another element.
10. A(n) ____ occurs when the fission of one nucleus triggers the fission
of many other nuclei.
11. In ____ an atomic nucleus ejects two protons and two neutrons.
12. In ____ a neutron in a nucleus splits into a proton and an electron.
13. In ____ the nucleus of an atom emits a high-energy photon but the
number of protons and neutrons stays the same.