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52 terms

Science Energy Unit

STUDY
PLAY
Energy is measured in
joules
Energy associated with motion is called
kinetic energy
when natural gas heats water, what energy conversion is taking place
chemical energy to thermal energy
When energy is converted, how much energy is destroyed in the process?
none
The total energy of all the particles in a substance is called?
thermal energy
The more particles a substance has at a given temperature,
the more thermal energy it has
the movement of thermal energy from a warmer object to a cooler object is called
heat
heat is measured in what?
joules
heat is transferred from one particle of matter to another without the movement of matter itself in a process called
conduction
The transfer of energy by electromagnetic waves is called
radiation
heat transfer occurs from cold objects to warmer ones or from warm objects to cold ones
warm objects to cold ones
A material that does not conduct heat well is called
an insulator
the amount of energy required to raise the temperature of 1 kilogram of a substance by 1 kelvin is called its
specific heat
which of the following has the greatest specific heat? aluminum, glass, sand, water
water
The addition or loss of thermal energy changes the arrangement of the particles during
a change of state
The temperature at which a solid changes into a liquid is called
the melting point
the expanding of matter when it is heated is known as
thermal expansion
Water freezes at 32 degrees on which temperature scale?
Fahrenheit
Absolute zero is shown as 0 on which scale?
Kelvin
Which of the following is true of the Celsius scale? 0 degrees is absolute zore, 0 degrees is the freezing point ofwter, 32 degreethe freezing point of water.
0 degrees is the freezing point of water
Heated air moves from baseboard heaters to the rest of the room in a process called
convection
which is the best conductor? wood, paper, silver, air
silver
when gasses expand, they fill how much space?
all the space available
a measure of the average kinetic energy of the individual particles in an object is called
temperature
A solid is a state of matter that has a indefinite or definite shape? definite or indefinite volume?
definite shape and volume
Particles of a liquid do or do not have close contact with each other and are or are not tightly packed?
they are in close contact with one another but are not tightly packed.
the freezing point of water is the same as its
melting point
Soup is being heated on a stove, and water droplets are forming on the back of the stove. what sequence has occurred?
vaporization then condensation
in cold climates, the amount of snow on the ground may decrease even if the temperature stays below zero degrees Celsius. The process that best describes this event is
sublimation
In which state of matter are particles packed tightly together in fixed positions?
solid
electromagnetic waves can transfer energy without a(n)
medium
during the convection lab, why did the food coloring placed above the cup with hot water rise to the top?
warm water was less dense
What is the movement of the warm and cold fluid called when it develops the "circular" motion?
convection current
In the radiation lab activity, what was the dependent variable?
the temperature change of each substance
The transfer of thermal energy from one substance to another through direct contact is?
conduction
The handle of a metal spoon warms up when it is placed in a hot bowl of soup because of
conduction
One possible cause of tectonic plate motion is the rise of hot material from deep within the Earth while cooler material near the surface sinks. As this process repeats, it is an example of
convection
The transfer of energy by electromagnetic waves is called
radiation
A measure of the average kinetic energy of the individual particles in an object is called
temperature
In the Leslie cube experament, what was the dependent variable?
the temperature
Which of the following surfaces would absorb heat most rapidly? shiny black, shiny white, dull black, dull white, shiny black
dull black
Which of the following was the worst conductor? steel copper air or diamond
air
What method of heat transfer is demonstrated by the sun heating the Earth?
radiation
What method of heat transfer is demonstrated by a hot air balloon rising?
convection
What method of heat transfer is demonstrated by you being warmed, sitting near a fire?
radiation
Which of the following temperatures is the highest? 100 degrees C, 100 degrees K, 100 degrees F, or they are all the same?
100 degrees C
During conduction heat is transferred by the movement of currents within a fluid.
false, that is convection
Trapped air is a good conductor because it reduces heat transfer.
false, it is a good insulator
Particles of matter in the solid state are held together but can move around each other.
false, they cannot move around each other
A substance gains thermal energy as it freezes.
false, it decreases
A change in the thermal energy of an object is related to the objects specific heat, temperature change, and mass.
true
Particles in a liquid move around just as freely as particles in a solid.
false, they do not