30 terms

# 6th Grade - Catch the Wave!! Energy Unit

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conduction
Heat is passed from atom to atom through direct contact
convection
Transfer of heat as a result of warm less dense liquids/gases rising and the cool less dense sinks
Energy transferred by waves or rays
transfer
to move from one place to another
heat
Energy that transfers from one object to another because of a temperature difference between the objects
thermal expansion
Increased temperatures that cause molecules to speed up, move farther apart and take up more space
conductor
A material that heat flows through easily
insulator
A material that does not easily transfer heat between its particles
vibration
A repeated back-and-forth or up-and-down motion
medium
Material through which a wave travels
frequency
How many waves can pass a given point per second, measured in Hertz (Hz)
amplitude
Height of a wave, associated with loudness
pitch
The highness or lowness of a sound, associated with frequency
loudness
Perception of intensity of a sound.
wavelength
The distance between two corresponding parts of a wave
longitudinal wave
A wave that moves the medium parrelel to the direction in which the wave travels.
transverse wave
A wave that moves the medium in a direction perpendicular to the direction in which the wave travels
trough
Lowest point of a wave
crest
Highest point of a wave
rarefaction
The part of a longitudinal wave where the particles of the medium are far apart
compression
The part of a longitudinal wave where the particles of the medium are close together.
electromagnetic
Includes all forms of electromagnetic radiation; the types of radiation differ in their frequencies and wavelengths ---Lower Energy < Radio, Microwave, Infrared, Visible,Ultraviolet, X-Ray, Gamma > Higher Energy
disturbance
a movement that begins in one location and sets things in motion farther away
transparent
Allows light rays to pass through without scattering
opaque
Not allowing light to pass through
translucent
Transmits some light through but not enough for a clear image
refraction
The bending of a wave as it enters a new medium at an angle
light
Electromagnetic radiation that lies within the visible range.
sound waves
a longitudinal wave consisting of compressions and rarefactions, which travels through a medium
vacuum
an empty space with no particles and no pressure