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Science.5 Waves, Sound, Light Review
Waves - Sound and Light
45
Science
8th Grade
03/14/2011

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Cards

Term
Troughs, crests, and wave energy are all related to ___________________.
Definition
amplitude
Term
Transverse waves are waves in which the particles of the medium move at _______ ______ to the direction of the wave.
Definition
right angles
Term
The type of medium determines the _________ of a wave.
Definition
speed
Term
The lowest point on a wave is called the ________.
Definition
trough
Term
What is it called when air molecules are crowded together?
Definition
compression
Term
What does hertz measure?
Definition
frequency
Term
When a wave is traveling at a constant speed and a constant direction, what do we know about the medium?
Definition
The medium has remained the same.
Term
Amplitude depends on the __________ of a wave.
Definition
energy
Term
What is it called when a wave strikes a surface and bounces back at the same angle at which it struck?
Definition
reflection
Term
What does the density of a medium affect?
Definition
the speed of a wave
Term
Give an example of refraction.
Definition
Pencil is placed in a glass of water and it looks like it is bent.
Term
When waves move at different speeds in different mediums it is called?
Definition
refraction
Term
What phase of matter does sound travel the fastest through?
Definition
solids
Term
How is sound produced?
Definition
a vibration
Term
Give an example of longitudinal wave.
Definition
Sound waves
Term
What is frequency?
Definition
The number of waves per unit of time.
Term
When you have to locate object in water or determine an underwater distance, what would you use?
Definition
Sonar
Term
Amplitude determines the ___________ of sound.
Definition
loudness
Term
Sound waves can be transmitted through all phases of ___________ .
Definition
phases of matter
Term
What type of wave travels as a series of compressions and rarefactions?
Definition
sound; longitudinal
Term
What waves differ from other waves because they can travel in a vacuum?
Definition
Electromagnetic
Term
Radio waves have the __________ frequency and the __________ wavelength.
Definition
lowest frequency, longest wavelength
Term
What electromagnetic wave has the highest frequency?
Definition
gamma rays
Term
Why are sound waves not found on the electromagnetic spectrum?
Definition
Sound waves are mechanical and cannot travel in a vacuum.
Term
On the electromagnetic spectrum, what colors are found under visible light? (In order)
Definition
Red, Orange, Yellow, Green, Blue, Indigo and Violet (ROY G. BIV)
Term
What has a shorter wavelength visible light or radio waves?
Definition
visible light
Term
Is the speed of light the fastest in a solid, liquid, gas or vacuum?
Definition
vacuum
Term
What is an example of a transverse wave?
Definition
Light wave
Term
A microwave is considered what type of wave?
Definition
radio
Term
What is an illuminated object?
Definition
ILLUMINATED OBJECT is an object that can be seen because it is lit up
Example: moon, book
Term
When there is very little scattering of light what type of reflection is it?
Definition
regular reflection; example: mirror, glass
Term
When light is scattered in many different directions from an irregular surface what type of reflection is it?
Definition
diffuse reflection; example: wall
Term
What does it mean when a substance is transparent?
Definition
It transmits light easily
Term
What does it mean when a substance is translucent? What is the image like?
Definition
When light is transmitted and scatters the light, the image is unclear and lacks detail.
Term
An apple is red because red is _____________ and the other colors are ____________________.
Definition
red is REFLECTED; other colors are ABSORBED
Term
What color reflects all colors and does not absorb any color of the spectrum?
Definition
white
Term
What color absorbs all the colors of the spectrum?
Definition
black
Term
When light passes through a prism VIOLET is the most visible. Why is that true?
Definition
Violet has the shortest wavelength and is refracted the most.
Term
When light passes through a prism RED is the least visible. Why is that true?
Definition
Red has the longest wavelength and is refracted the least.
Term
What is the reason there are different colors on the electromagnetic spectrum?
Definition
Each color has a different wavelength
Term
What happens to reflected light when it hits a rough surface?
Definition
the light scatters
Term
How do you measure a wavelength in a longitudinal wave?
Definition
Measure rarefaction to rarefaction OR measure compression to compression
Term
When parallel light rays hit a concave mirror, the light rays reflected back to a __________________.
Definition
focal point
Term
What happens to the intensity of a wave as it travels away from its source?
Definition
it decreases
Term
A movement that follows the same path repeatedly is called a ______________.
Definition
vibration
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