Using solar energy is especially appealing because it is ___________.
free
Most ______________ use fuel or electricity as a source of energy.
heat systems
A house with large windows on its south side and a few windows on its other sides probably uses a(n) ________ solar heating system.
passive
Solar collectors are used in buildings that have ________ solar heating systems.
active
Fuel burned in a stove or fireplace transfers thermal energy to the surrounding air by ______, convection, and radiation.
conduction
Before solar energy can be used as a source of hear, it must be changed to ________.
thermal energy
_______________ means rapid burning.
combustion
A two-way heat mover is a ___________.
heat pump
A ___________ is the movement of a piston up or down.
stroke
Refrigerators and air conditioners are examples of:
a. heat pumps
b. heat engines
c. heat movers
d. solar collectors
c. heat movers
Wind and ocean currents are formed by:
a. radiation
b. convection
c. conduction
d. condensation
b. convection
A material that reduces the flow of heat by conduction, convection, and radiation is a(n):
a. conductor
b. insulator
c. solar collector
d. radiator
b. insulator
All of the following are good conductors of heat EXCEPT for:
a. silver
b. copper
c. aluminum
d. air
d. air
Of the following, the insulation that is most resistant to heat flow is rated:
a. R-40
b. R-20
c. R-10
d. R-1
a. R-40
The process by which engine fuels burn is:
a. radiation
b. convection
c. combustion
d. insulation
c. combustion
Through which of the following will convection most likely occur?
a. solids and liquids
b. solids and gases
c. solids
d. liquids and gases
d. liquids and gases
Gasoline and diesel engines are:
a. internal combustion engines
b. heat pumps
c. external combustion engines
d. heat movers.
a. internal combustion engines
The transfer of energy that does not require matter is:
a. combustion
b. conduction
c. convection
d. radiation
d. radiation
Solar collectors are parts of:
a. passive solar heating systems
b. internal combustion engines
c. active solar heating systems
d. external combustion engines
c. active solar heating systems
Energy from the sun travels to Earth as:
a. mechanical energy
b. radiant energy
c. chemical energy
d. combustion
b. radiant energy
Of the following, the best insulator would be:
a. silver
b. copper
c. air
d. iron
c. air
A device that heats your home by tranferring thermal energy from a region of low temperature to a region at a higher temperature is a:
a. heat mover
b. radiator
c. conductor
d. heat engine
a. heat mover
A device that converts thermal energy in to mechanical energy is a:
a. heat mover
b. radiator
c. conductor
d. heat engine
d. heat engine
The effectiveness of insulation is rated with a(n)
a. convection value
b. r-value
c. temperature value
d. solar value
b. r - value
The inside surfaces of the glass inside vacuum bottles are coated with aluminum to prevent heat loss by:
a. radiation
b. combustion
c. convection
d. solar energy
a. radiation
Compared to the efficiency of a gasoline, a diesal engine is :
a. 1/4 as efficient
b. 1/2 as efficient
c. 2x as efficient
d. 4x as efficient
c. 2x as efficient
Temperature messures the __ of particles of a material:
a. heat
b. kinetic energy
c. potential energy
d. kinetic energy
a. heat
Two equal masses of 2 different kinds of matter:
a. always have the same thermal energy
b. nver have the same thermal energy
c. probably have the same theraml energy
d. probably have diff. thermal energy
a. always have the same thermal energy
The specific heat of an object depends on its:
a. chemical makeup
b. heat
c. temperature
d. thermal energy
d. thermal energy
Particles that make up matter are in constant motion
true
The faster particles move the LESS kinetic energy they have
false MORE
TEMPERATURE is the measure of the average kinetic energy of the particles in an object
true
When temperature INCREASES, the kinetic energy of the particles decreases
false, DECREASES
The thermal energy of an object is the TOTAL energy of the particles in a material
true
A 5kg chunk of aluminum and a 5kg block of silver that are at the same temperature have the SAME thermal energy
true
Heat flows from HIGER temperature to lower temperature
true
Heat is measured in NEWTON
false KELVIN
Different materials need THE SAME amounts of heat to have similar changes in temperatures
fales DIFFERENT
The amount of energy it takes to raise the temperature of 1 kg of a material 1 kelvin is the SPECIFIC HEAT of the material
true
Water has a relatively LOW specific heat
true
Materials with a high specific heat can absorb a lot of energy and show LITTLE change in temperature
true
Materials that are poor conductors are POOR insulators
false GOOD
The transfer of energy through matter by direct contact of its particles is CONVECTION
true
The transfer energy in the form of invisable waves is CONDUCTION
false RADIATION