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Physical Science 5&6
n/a
156
Science
Undergraduate 1
10/23/2008

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Cards

Term
What are the two types of waves?
Definition
Radio and Infrared.
Term
Radio Wave
Definition
Moves through air.
Term
Infrared Wave
Definition
Heat and Sun.
Term
Properties of Waves
Definition
1 - A wave ripples in all directions
2 - Energy moves through water in the form of a wave
Term
Wave
Definition
A disturbance that travels through space or matter in a regular pattern through space.
Term
Vibration
Definition
A back and forth motion that repeats itself.
Term
In what material does the best transmission of sound occur?
Definition
Solids because the particles are so close together.
Term
Rate of Vibration
Definition
Frequency.
Term
Transverse Waves
Definition
Matter vibrates up and down, angles to the direction at which the wave travels.
Term
Compressional Waves
Definition
No up and down motion, the disturbance that starts this wave is a movement that pushes parts of the spring closer together and then returns to the original position.
Term
Compression
Definition
Molecules close together
Increase Density
Increase Pressure
Term
Rarefaction
Definition
Molecules spread out
Decrease Density
Decrease Pressure
Term
Crest
Definition
Top of the wave.
Term
Trough
Definition
Bottom of the wave.
Term
Amplitude
Definition
Maximum extent of displacement from equilibrium.
Term
Cycle
Definition
One complete vibration.
Term
Gasses and liquids support ONLY...
Definition
compressional waves
Term
Solids support...
Definition
both transverse and compressional waves.
Term
Magnetism.
Definition
The attraction that magnets have for magnetic material and the attraction and repulsion between poles.
Term
True or False...Magnetic force is invisible.
Definition
True -- Magnetic force is invisible.
Term
Magnetic Domains.
Definition
Atoms in magnetic materials line up so that their magnetic fields combine, the materials become a magnet.
Term
True or False...Geographic north and south are the same as Magnetic north and south.
Definition
False -- Geographic north and south are not the same as Magnetic north and south.
Term
Does the compass point to magnetic north or geographic north?
Definition
Magnetic north.
Term
What is a magnet?
Definition
A coil of wire that creates a measurable current.
Term
Electromagnet
Definition
Coil of water around an iron core.
Term
Electromagnet Induction
Definition
Current produced when wire is moved at right angles in a magnetic field.
Term
Generator
Definition
A machine that turns mechanical energy into electrical energy. The rotation of a coiled wire.
Term
Visible Light
Definition
Only form of radiant energy we can see.
Make up only as small part of the spectrum.
Term
Radiant energy is...
Definition
energy transferred by electromagnetic waves.
Term
Electromagnetic Waves
Definition
Make up electric and magnetic fields.
Can travel through anything.
Transverse wave.
Term
Electromagnetic Spectrum
Definition
Different forms of electromagnetic waves.
Term
Are frequency and wavelength the same throughout the electromagnetic spectrum?
Definition
No -- they change as the wavelengths change.
Term
Infrared Waves
Definition
Invisible heat waves.
Sun gives of infrared waves.
Term
Ultraviolet Rays
Definition
Invisible.
Dangerous rays from the sun.
Term
X-Rays and Gamma Rays
Definition
Very Damaging.
Used in the medical field.
Can pass through most substances.
Higher frequencies.
Lower wavelengths.
Term
Illuminated Objects
Definition
Objects that reflect light.
Only can be seen when the light.
Most things we see are illuminated objects.
Example -- the moon.
Term
Transparent
Definition
Material that allows light to pass through. Examples -- air and glass.
Term
Translucent
Definition
Material that allows only some light to pass through. Example -- wax paper.
Term
Opaque.
Definition
Material that does not allow light to pass through. Example -- wood.
Term
Light year
Definition
Distance light travels in one year.
Term
Reflection
Definition
Bouncing back of light rays from a surface.
Term
Incident ray
Definition
Light ray that strikes the surface.
Term
Diffraction
Definition
The spreading out of waves past the edge of a barrier.
Term
Refraction
Definition
Waves caused by a disturbance.
Term
Irregular Interference
Definition
In some places, a crest cancels a trough; in others a crest reinforces another.
Term
Vibration
Definition
The transfer of forced energy by contact.
Term
Constructive
Definition
When two crests meet. Increased amplitude and greater sound.
Term
Destructive
Definition
When the crest of one wave meets the trough of another -- they cancel one another out.
Term
Irregular Interference
Definition
A crest can cancel a trough or add to a crest.
Term
Waves carry ___________ from one place to another.
Definition
Waves carry ENERGY from one place to another.
Term
Waves produced by throwing a rock in a pond are called ___________ waves.
Definition
Transverse Waves --- radio waves.
Term
Trough
Definition
lowest point of the wave
Term
Crest
Definition
highest point of the wave
Term
True or False...The different height between the trough and the crest of the wave is called the wave's amplitude.
Definition
True
Term
Wave Length
Definition
Difference between the crests.
Term
A longitudinal wave can also be called a ____________ wave.
Definition
Compressional
Term
A __________ wave resembles a transverse wave but occurs in mediums that are fixed at both ends.
Definition
Standing waves -- Ex.)Guitar, Drums
Term
Waves created by earthquakes
Definition
Seismic
Term
What kind of waves travel through electrical fields.
Definition
Electromagnetic.
Term
All waves are subject to four different types of phenomenon:
Definition
1.)Reflection
2.)Diffraction
3.)Refraction
4.)Interference
Term
True of False...All of a wave's energy is reflected as it strikes an object.
Definition
False.
Term
True or False...Sound waves travel faster in air than in water.
Definition
False.
Term
Refraction
Definition
Change in the direction of a wave due to the change in speed of the wave.
Term
What does the amount of refraction depend on?
Definition
The properties of the wave.
Term
Waves ________as they pass by the edges of objects in their path.
Definition
move
Term
Diffraction
Definition
The bending of waves around small obstacles and the spreading out of waves past small openings.
Term
In phase
Definition
If the crest of two waves at the same frequency pass a given point at the same time.
Term
Out of Phase
Definition
If the crest of one wave at the same frequency reaches the same point as the trough of another wave.
Term
True of False...An object's natural frequencies depend on its weight and mass.
Definition
True.
Term
The ___________ of a sound wave depends on how much matter carrying the wave is compressed by each vibration.
Definition
Amplitude.
Term
True or False...The frequency of a sound wave is the same as the frequency of the vibration that produces the sound.
Definition
True
Term
Ultrasounds
Definition
20,000 hertz
Term
The pitch of a train whistle appears to ________ as it approaches and ____________ as it travels away from an observer.
Definition
increase, decrease
Term
Speed of Sound
Definition
How much distance a wave travels in a certain amount of time.
Term
All sounds are produced by ___________.
Definition
Vibrtaions
Term
A field study that analyzes the behavior of waves.
Definition
Acoustics
Term
Reverberation
Definition
Multiple reflections of sound waves.
Term
What absorbs sound energy?
Definition
Foam, Carpet
Term
Decibels
Definition
Measurement of the intensity of sound.
Term
Three parts of the ear
Definition
1.) Outer
2.) Middle
3.) Inner
Term
Sound travels through the ear canal to a thin, tight membrane called _________.
Definition
The ear drum.
Term
Hair Cells
Definition
Small fibers that are stimulated by the motion of fluid within the inner ear.
Term
True or False...The greater amount of energy created by a wave, the smaller its amplitude.
Definition
False
Term
Does speed of wave depend on temperature?
Definition
Yes...warmer --> faster and cooler --> slower.
Term
Echo
Definition
Sound wave that reflects from a surface
Term
SONAR
Definition
SONAR: Sound Navigation and Ranging. Sonar has been used to map the ocean floor, find fish, sunken ships, etc.
Term
Sonic Boom
Definition
A loud sound produced from an objects traveling at the speed of sound. Compression waves at the front of the object are pushed together.
Term
More protons
Definition
Positive Charge
Term
More Electrons
Definition
Negative Charge
Term
Static Electricity
Definition
The effects caused by electric charges at rest.
Term
An object becomes charged and three ways.
Definition
1.)Friction
2.)Contact
3.)Induction
Term
Friction
Definition
Transfer of electrons from one object to the next.
Term
Contact...
Definition
with another charged body.
Term
Induction
Definition
The charge is produced by redistribution of charges in a material.
Term
True of False...Electrical charges cannot be created, only transferred.
Definition
True.
Term
Substances that allow electrons to flow...
Definition
Silver, Copper, Aluminum
Term
Substances in which electrons do not flow freely...
Definition
glass, hard rubber, dry air
Term
Semi-conductors
Definition
Both insulates and conducts -- silicone and germanium
Term
The __________ of an electric charge is identified with the number of electrons that have been transferred.
Definition
Magnitude
Term
Coulomb's Law
Definition
Describes the relationship between charge, distance, and magnitude of the electrical force between two bodies.
Term
Electrical Force Field
Definition
The space around an electric charge is considered to be changed by the presence of the charge.
Term
Current Electricity
Definition
A flow of charge, moving charges produce current electricity, the charges flow along a path called a circuit
Term
Flow in only one direction
Definition
Direct Current
Term
Reverse direction constantly
Definition
Alternating Current
Term
Series Circuit
Definition
When electricity has only one path to follow.
Term
Parallel Circuit
Definition
When electricity has more than one path to follow.
Term
Ampere
Definition
Meausure of the number of charges that flow past a point in one second.
Term
The number of electrons that can flow in a conductor depends on....
Definition
Voltage
Term
Greater voltage =
Definition
Greater # electrons that can flow.
Term
Resistance
Definition
The opposition of charges to flow.
Term
Refraction
Definition
The change in direction of a light ray as it passes from one medium to another.
Term
Index of Refraction
Definition
A measure of the refraction of light in a medium as the light enters from air or a vacuum.
Term
Dispersion
Definition
The separation of white light into colors.
Term
Color Subtraction
Definition
The process of producing a color by absorbing other colors of light.
Term
Color Addition
Definition
The process of producing colors by absorbing colors of light.
Term
Light travels to the earth from the sun in the form of ____________.
Definition
Electromagnetic Waves.
Term
What are the eight types of waves found in the electromagnetic spectrum.
Definition
1.) Gamma Rays
2.) X-Rays
3.) Ultraviolet Rays
4.) Visible Light
5.) Radio Rays
6.) Infrared Rays
7.) Microwaves
8.) Cosmic Rays
Term
True or False...Microwaves are like radio waves but have a shorter wavelength.
Definition
True.
Term
How is visible light produced?
Definition
Visible light is produced by electrons moving between energy levels. Atoms must get excited or calmed down.
Term
Incandescence
Definition
Light is produced by thermal energy exciting electrons.
Term
Contains mercury vapor that emit ultraviolet radiation when excited by an electric current.
Definition
Fluorescent.
Term
True or False...Most objects produce their own light as they are unable to reflect light from sources such as the sun.
Definition
False.
Term
Mirrors that curve inward.
Definition
Concave.
Term
True or False...Most objects produce their own light as they are unable to reflect light from sources such as the sun.
Definition
False.
Term
Mirrors that curve inward.
Definition
Concave.
Term
Mirrors that curve inward.
Definition
Concave.
Term
Mirrors that curve outward.
Definition
Convex.
Term
What is an example of a concave mirror.
Definition
Make-up mirrors.
Term
Give an example of a convex mirror.
Definition
Rear-view Mirror
Term
Three primary colors.
Definition
Red, Yellow, Blue
Term
What are the two types of lenses.
Definition
Concave and Convex.
Term
Incident Angle
Definition
The angle representing the direction of motion of incoming light approaching a boundary.
Term
Critical Angle
Definition
Limit to the angle of incidence when all light rays are reflected internally.
Term
The lens in our eyes.
Definition
Convex
Term
True or False...The distance between a lens and it's focal point it is focal length and is determined by how much the lens in curved.
Definition
True.
Term
Nearsighted
Definition
Unable to see distant objects.
Term
Farsighted
Definition
Unable to see close up objects.
Term
Diffraction
Definition
The bending of light waves that occurs when light travels through a small opening or slit.
Term
True or False...Different wave lengths of light diffract at different rates.
Definition
True.
Term
Where are polarizes commonly used.
Definition
Camera, Sunglasses.
Term
Laser stands for...
Definition
Light by Amplification of Stimulated Emitions of Radiation.
Term
Electricity is formed by the movement of _________.
Definition
Electrons.
Term
Three major particles of an atom.
Definition
Electrons, Protons, Neutrons
Term
Both positive and negative charged atoms are called...
Definition
Ions.
Term
The electrical charge an object develops as a result of having unequal number of protons and electrons.
Definition
Static Electricity.
Term
Coulomb
Definition
The measurement of the amount of electrical charge.
Term
Conductor
Definition
material that allows electrons to flow easily through
Term
True or False...Water is a good conductor of electricity.
Definition
False.
Term
Insulators
Definition
Objects that do not allow electricity to flow easily.
Term
Difference between potential energy in the negative terminal and positive terminal.
Definition
Potential Difference.
Term
Volts
Definition
Measurement of electrical potential differences.
Term
What are the two basic types of circuits?
Definition
Parallel and Series
Term
The flow of electricity is measured in...
Definition
Amps.
Term
Simplest means of controlling the flow of current through a circuit.
Definition
Switch
Term
Rate at which work is done and energy is used.
Definition
Power.
Term
Measure the power required to operate a device.
Definition
Watt.
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