Shared Flashcard Set

Details

Heat & Energy
Heat & Energy Test Review
30
Science
8th Grade
01/25/2008

Additional Science Flashcards

 


 

Cards

Term
Define Temperature
Definition
A measure of the AVERAGE kinetic energy of the particles in a substance
Term
Define Thermal energy
Definition
A measure of the TOTAL kinetic energy of the particles in a substance
Term
Define Heat
Definition
The transfer of thermal energy
Term
Conduction
Definition
transfer of energy because of the location of object to a heat source
Example: a metal spoon heating up in a pot
Term
Convection
Definition
the transfer of energy in a liquid or gas through a current, hot material rises because its less dense, cooler material sinks because its more dens;
example: a pot of boiling water
Term
Absolute zero
Definition
A point where there is no more energy is the system and all movement of the molecules has stopped
Term
Three methods of heat transfer
Definition
Convection, Conduction, Radiation
Term
Conductor
Definition
A material that transfers heat and thermal energy well; ex: metals
Term
Insulator
Definition
A material that does not transfer heat or thermal energy well; ex. wood, wool, cotton, cork
Term
Radiation
Definition
the transfer of energy through electromagnetic waves;
example: sunlinght, heat lamp
Term
Heat moves from
Definition
Warmer objects to cooler ones
Term
Three states of matter
Definition
Solid, liquid, gas
Term
Specific heat
Definition
How much energy is required to raise the temperature of a substance
Term
Low specific heat
Definition
Heats up quickly, requires very little energy
Term
High specific heat
Definition
Heats up slowly, requires a lot of energy
Term
Gas
Definition
Atoms are very spread out and move around a bunch; has lots of energy; no definite shape or volume
Term
Why do substances have phase changes?
Definition
They gain or lose thermal energy which rearranges the particles
Term
Freezing
Definition
From a liquid to a solid, energy is LOST
Term
Solid
Definition
Atoms are packed close together and just vibrate in place; very little energy; has a definite shape and volume
Term
Melting
Definition
Solid to a liquid, energy is GAINED
Term
Boiling points of water
Definition
100 C, 212 F
Term
Evaporation
Definition
Liquid to a gas, energy is GAINED
Term
Condensation
Definition
Gas to a liquid, energy is LOST
Term
Deposition
Definition
Gas to a solid, energy is LOST
Term
Thermal expansion
Definition
the process of a substance expanding when being heated
Term
What happens to temperature through a state change?
Definition
The temperature does not change, the thermal energy is just rearranging the atoms/molecules
Term
Sublimation
Definition
Solid to a gas, energy is GAINED
Term
Liquid
Definition
Atoms are more spread apart and can move around each other; takes the shape of the container its in, has a definite volume
Term
Freezing points of water
Definition
0 C, 32 F
Term
Thermal expansion
Definition
The expanding of matter when it is heated becuase kinetic energy increases and the particles spread apart
Supporting users have an ad free experience!