Unit 3--Fall Flashcards
Strengthen knowledge of vocabulary to increase comprehension of subject
measure of the amount of kinetic energy in a material/object
temperature
sum of potential and kinetic energy in an object
thermal energy
thermal energy that flows from an area of high temperature to an area of low temperature
heat
amount of heat required to raise 1 kg of a material by 1 degree C
specific heat
transfers thermal energy by electromagnetic waves
radiation
transfers thermal energy by collisions between particles in matter
conduction
transfer of thermal energy in a fluid by movement of warmer and cooler fluid from place to place, like currents
convection
material in which heat flows slowly
insulator
material in which heat flows quickly
conductor
how particles move: includes 3 parts
all matter is made up of particles, all particles are in constant, random motion and particles collide with themselves and their container
kinetic molecular theory
temperature at which a solid begins to liquefy, particles slip out of their ordered arrangement
melting point
amount of energy required to change a substance from solid to liquid at its melting point
heat of fusion
temperature at which pressure of the vapor in the liquid is equal to external pressure acting on the surface of liquid
boiling point
amount of energy required for liquid at its boiling point to become a gas
heat of vaporization
spreading of particles until particles are uniformly distributed, particles move from an area of higher concentration to an area of lower concentration until equilibrium
diffusion
matter consisting of positively and negatively charged particles
plasma
increase in size when temperature is increased
thermal expansion
ability of a liquid or gas to exert an upward force on an object immersed in it
buoyancy
force per unit area; measured in pascals
pressure
mass divided by volume
density
resistance to flow of a fluid; resistance of a fluid to flow
viscosity
Newton / meter squared; measure of pressure
pascal
plasma, solid, liquid, gas
four states of matter
buoyant force of an object is equal to the weight of the fluid the object displaces; if these are equal the object floats
Archimedes’ Principle
pressure applied to a fluid is transmitted unchanged throughout the fluid
Pascal’s Principle
pressure exerted by a fluid decreases as it’s velocity increases; faster moving particles have less pressure than slower moving particles
Bernoulli’s Principle
when volume of a gas decreases, the pressure increases at a constant temperature
Boyle’s Law
volume of a gas increases when temperature increases at constant pressure
Charles’s Law
repeating disturbance/movement that transfers energy through matter/space
wave
matter waves travel though
medium
matter in medium moves perpendicular to wave direction
transverse wave
matter in medium moves in same direction as wave travels
compressional wave/longitudinal wave
high points (top) in wave
crests
low points (bottom) in wave
troughs
dense region of compressional wave
compression
less dense region of compressional wave
rarefaction
distance crest to crest in transverse wave OR distance from compression to compression in compressional wave
wavelength
number of wavelengths passing a fixed point in a second
frequency
amount of time it take one wavelength to pass a point
period
frequency times wavelength
wave speed
distance from rest position to top of crest or bottom of trough
amplitude of transverse wave
distance between coils in compressions and rarefaction
amplitude of longitudinal waves (compressional)
wave strikes an object and bounces off
reflection
bending of a wave caused by change in speed as it moves from medium to medium
refraction
an object causes a wave to change direction and bend around the object
diffraction
waves overlap and combine to form a new wave
interference
waves in phase; 2 or more waves arrive at the same place at the same time to form a new wave, amplitudes are added together in the new wave
constructive interference
waves out of phase; 2 or more waves arrive at the same place at the same time to form new wave, amplitudes are subtracted from each other in new wave
destructive interference
wave pattern where waves of equal wavelength and amplitude travel in opposite directions
standing wave
object vibrates by absorbing energy at its natural frequencies
resonance
vibrating electric charges; transfer energy between vibrating electric and magnetic fields; travel through space
electromagnetic waves
energy carried by electromagnetic waves
radiant energy
particles whose energy depends on frequency of waves
photon
low frequency electromagnetic waves with wavelengths longer than 1mm
radio waves
radio waves with wavelengths less than 1m
microwaves
electromagnetic waves with wavelength between 1mm and 750 billionths of a meter; thermal energy is transmitted by these
infrared waves
range of electromagnetic waves detectable with your eyes; wavelengths from 750 billionths to 400 billionths of a meter
visible light
electromagnetic waves with wavelength from 400 billionths to 10 billionths of a meter; cause sunburn and damage skin
ultraviolet waves
electromagnetic waves with wavelengths from 10billionths of a meter to 10 trillionths of a meter; uses in medicine and airports
X-rays
electromagnetic waves with wavelengths shorter than 10 trillionths of a meter; highest energy electromagnetic waves
gamma rays
system of satellites, monitoring stations and receivers to determine exact location at or above Earth’s surface
Global Positioning System (GPS)