38 terms

# MPCS 6th grade Science Chapter 16

###### PLAY
wave
rhythmic disturbance that carries energy, but not matter
mechanical wave
a tranverse of compressional wave that only can travel through matter
transverse wave
a type of mechanical wave in which the wave energy causes matter in the medium to move up and down or back and forth at right angles to the direction the wave travels
compressional wave
a type of mechanical wave in which matter in the medium moves forward and backward along the direction the wave travels
electro magnetic waves
waves that can travel through space where there is no matter
amplitude
for a transverse wave, is one-half the distance between a crest and a trough
wave length
for a transverse wave, the distance from the top of one crest to the top of the next crest, or from the bottom of one trough to the the bottom of the next trough
frequency
number of wavelengths that pass a given point in per second
reflection
occurs when a wave hits a subject or suface and bounces off
refraction
bending as a wave as it moves from one medium into another
diffraction
bending of waves around a barrier
interference
occurs when two or more waves combine and form a new wave
amplitude
the distance from the crest or trough of a wave to the rest position
compression
squeezing a group of particles in a wave
constructive interference
a combination of waves form a larger wave
destructive interference
a combination of waves form a smaller wave
medium
matter through which a wave transfer energy
wave speed
the product of wavelength and frequency
rarefraction
a region of spread-out particles in a wave
wave length
the distance between a point on a wave and the identical point on the next wave
Two types of mechanical waves
transverse and compressional waves
Waves do not carry matter, they carry
energy
Four properties of waves
amplitude, wavelength, frequency, speed
with visible light _________ indicates what color is seen
wavelength or frequency
common name for a reflection of a sound wave
vibration
mechanical waves travel in a medium in which atoms are
in solids and slowest in gases
electromagnetic waves travel faster in a medium with________ atoms in in
fastest in gases and slowest in solids
light does not reflect well from rough surfaces - it will
not be a sharp image because the reflected light scatters in many different directions
shorter wavelengths equal
higher frequencies
longer wavelengths equal
smalles frequencies
smaller frequencies
low pitch of sound
greater frequencies
high pitch of sound
amplitude is directly related to
energy
The greater the amplitude of the wave, the greater the ________ the wave is carrying
energy
Examples of mechanical waves
sound waves, ocean wave, tidal wave
Examples of electromagnetic waves
radio waves, xrays, visible light, microwave
Type of electromagnetic waves
transverse
Calculate wave speed
frequency X wavelength