Lessons 3-5 Vocab Test

the perception of the energy of a sound

• loudness
• decibel
• microwaves

• pitch

the amount of energy per second carried through a unit area by a wave

• intensity
• electromagnetic wave

• electromagnetic spectrum

• pitch

a unit used to compare the loudness of different sounds

• decibel
• Doppler effect

• concave
• infrared rays

a description of how a sound is perceived as high or low

• pitch
• intensity

• opaque

• diffuse reflection

the change in frequency of a wave as its source moves in relation to an observer

• Doppler effect
• focal point

• visible light

• diffuse reflection

a wave made up of a combination of a changing electric field and a changing magnetic field

• electromagnetic wave
• convex

• translucent

• decibel

the complete range of electromagnetic waves placed in order of increasing frequency

• electromagnetic spectrum
• x-rays

• diffuse reflection

• loudness

electromagnetic waves with the longest wavelengths and lowest frequencies

• radio waves
• gamma rays

• electromagnetic wave

• intensity

electromagnetic waves that have shorter wavelengths and higher frequencies than radio waves

• microwaves
• ultraviolet rays

• electromagnetic spectrum

• transparent

electromagnetic waves with shorter wavelengths and higher frequencies than microwaves

• infrared rays
• visible light

• focal point

• pitch