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Mr.Evans - Heat unit
Heat unit vocabulary
22
Science
9th Grade
11/20/2009

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Term
Energy
Definition
the ability to dow work, forms are : heat, kinetic, potential
Term
Dynamic Equilibrium
Definition
the rate of energy into a system equals energy out of the system; energy movement but the level remains constant
Term
radiation
Definition
electromagnetic waves of UV visible light, and infrared energy
Term
electromagnetic radiation
Definition
wave energy that requires no medium for transfer
Term
refracted waves
Definition
bent light energy as it enters different density materials
Term
reflected waves
Definition
energy bounces off of an object
Term
potential energy
Definition
stored (hidden, latent) energy, energy of phase change; energy related to height or distance form a center of gravity
Term
kinetic energy
Definition
motion, temperature (vibration) energy
Term
conservation of energy
Definition
energy can't be created or destroyed, only transferred
Term
heat source/ heat sink
Definition
energy goes from heat source (hotter object) to a heat sink (colder object)
Term
absorbed
Definition
energy pulled into molecules
Term
scattered
Definition
energy sent in all direction. Water vapor causes blue sky. Dust causes sunset colors.
Term
friction
Definition
loss of energy due to molecule collisions; causes temperature rise
Term
closed system
Definition
perfectly insulated; no heat in or out
Term
open system
Definition
most real systems; heat in equals heat out. Example: a house and the outside environment
Term
light colors
Definition
heats slowly, cools slowly
Term
dark colors
Definition
heats quickly, cools quickly
Term
rough texture
Definition
absorbs energy well
Term
smooth texture
Definition
reflects energy away
Term
conduction
Definition
heat transfer by direct contact
Term
convection
Definition
heat transport through gases or liquids
Term
radiation
Definition
transport of energy through the vacuum of space
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