science test
what is true about the Celsius scale
0 degrees is the freezing point of water
most gasoline engines are ____ stroke engines
4
the addition or loss of thermal energy changes the arrangement of the particles during
a change of state
a refrigerator requires
a refrigerant
a device that uses an outside energy source to transfer thermal energy from a cool area to a warm area is
a refrigerator
one common application of thermal expansion is
a thermometer
no more energy can be removed from matter at
absolute zero
boiling is vaporization that takes place at or _____ the surface of a liquid
below
heat is transferred from one particle of matter to another without the movement of matter itself is a process called
conduction
the handle on a spoon in a bowl of soup becomes warm due to heat transfer by the process of _____
conduction
bare feet feel colder on a tile floor than on a rug because the tile floor is a better ____ of heat
conductor
heated air moves from baseboard heaters to the rest of the room in the process called
convection
a thermometer uses the fact that liquids such as mercury and alcohol ____ when heated
eexpand
vaporization that only takes place only at the surface of a liquid is called
evaporation
the bimetallic strip in a thermostat bends as it is heated because the two metals in the strip ____ at different rates
expand
a steam engine is an example of a
external combustion engine
water freezes at 32 degrees on which scale
fahrenheit
true or false during the power stroke of a four stroke engine the fuel mixture is squeezed into a smaller volume
false; compression
true or false as most substances are cooled, they expand
false; contract
true or false; during conduction heat is transferred by the movement of currents within a fluid
false; convection
true or false a student lists 3 temperatures 100d f 100d c and 100 k the highest is 100k
false; highest is 100c
true or false; trapped air is a good conductor because it reduces within a fluid.
false; insulator
true or false particles of matter in the solid state are held together but can move around eachother
false; liquid
true or false a material gains thermal thermal energy as it freezes
false; loses
true or false heat is is kinetic energy moving from a warmer object to a cooler object
false; thermal energy
the most unorginized state of matter is the _____ state
gaseous
what is true of gases
gases expand to fill all the space available
if ____ is transferred from object A to object B the thermal energy of object A decreases
heat
the movement of thermal energy from a warmer object to a cooler object is
heat
the conversion of thermal energy into mechanical energy requires a
heat engine
a material that does NOT conduct heat well is
insulator
fiberglass is a common ____ which is a material the transfer of heat
insulator
the SI unit of heat is the
joule
heat, like work is an energy transfer measured in
joules
a one-degree change in temp on the celcius temp scale is equal to a one degree temp change on the ____ temp scale
kelvin
absolute zero is shown at 0 on which scale
kelvin
an increase in the total energy of the particles of a substance results in an increase in the ____ energy of the substance
kinetic
a refrigerator uses ____ energy to transfer thermmal energy from a cool area to a warm area
mechanical
heat transfer occurs
only from warm objects to cooler ones
stars transfer thermal energy by the process of____
radiation
the transfer of energy by electromagnetic waves is called
radiation
iron has a higher specific heat than silver. if 1 kg of silver absorb equal amounts of heat, the temp of the ____ will increase by a greater amount
silver
what is a good conductor
silver
the amount of energy required to raise the temperature of 1 kilorgram of a substance by one kelvin is called its
specific heat
the joule per kilogram kelvin is the SI unit for
specific heat
in an internal combustion engine each up or down movement by a piston is called
stroke
any temp on the kelvin scale can be changed to celcius by
subtracting 273 from it
as a substance changes state, there is no change in the _____ of the substance
temperature
the temperature at which a solid changes into a liquid is called
the melting point
the more particles a substance has at a given temperature
the more thermal energy it has
during a change of state the addition or loss of ___ energy changes the arrangement of the particles in the substance
thermal
if two classes of water are at the same temp the average _______ energy of the particles of water in each glass is the same
thermal
a measure of the average kinetic energy of the individual particles in an object is
thermal energy
even tho the water in a filled bathtub may be as the same temp as water in a tea cup, the water in the bathtubb has more _____ because it contains a greater number of water molecules.
thermal energy
the total energy of all the particles in a substance is called
thermal energy
the expanding of matter when it is heated is known as
thermal expansion
how many forms, states does matter on earth exist in
three
a change in the thermal energy of an object is related to the objects specific heat, temperature change and mass
true
true or false the more particles a substance has at a given temperature the more thermal energy it has
true
substance with highest specific heat
water
