Nouns denoting natural phenomena

chemical energy
that part of the energy in a substance that can be released by a chemical reaction
 
northwest wind
a wind from the northwest
 
piezo effect
electricity produced by mechanical pressure on certain crystals (notably quartz or Rochelle salt); alternatively, electrostatic stress produces a change in the linear dimensions of the crystal
 
flashflood
a sudden local flood of great volume and short duration
 
heat of vaporization
heat absorbed by a unit mass of a material at its boiling point in order to convert the material into a gas at the same temperature
 
centripetal force
the inward force on a body moving in a curved path around another body
 
light air
wind moving 1-3 knots; 1 on the Beaufort scale
 
gaslight
light yielded by the combustion of illuminating gas
 
parhelion
a bright spot on the parhelic circle; caused by diffraction by ice crystals
 
antitrades
wind in the upper atmosphere blowing above but in the opposite direction from the trade winds
 
double bond
a covalent bond in which two pairs of electrons are shared between two atoms
 
nuclear propulsion
the use of a nuclear reactor either to produce electricity to power an engine (as in a nuclear submarine) or to directly heat a propellant (as in nuclear rockets)
 
debacle
flooding caused by a tumultuous breakup of ice in a river during the spring or summer
 
interreflection
reciprocal reflection between two reflecting surfaces
 
engine
something used to achieve a purpose
 
speech spectrum
the average sound spectrum for the human voice
 
medium wave
a radio wave with a wavelength between 100 and 1000 meters (a frequency between 300 kilohertz and 3000 kilohertz)
 
negative charge
having a surplus of electrons; having a lower electric potential
 
frost heave
upthrust of ground or pavement caused by the freezing of moist soil
 
low beam
the beam of a car's headlights that provides illumination for a short distance
 
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