thermal energy Flashcards
(17 cards)
kinetic molecular theory
all matter is made up of particles in constant motion (movement is related to temperature)
mass
the number of particles that make up a substance
volume
the amount of space occupied by a substance
density
how much mass occupies a certain space
density formula
d= m/v
degree of hotness=
speed
tempreture
speed of molecules or degree of hotness
thermal energy
quantity of hotness
temperature is….
the average kinetic energy of all particles in the sample of matter
what can temperature be measured in
celcius or kelvin
what is total thermal energy
the total energy of all the particles
heat
the amount of energy that is transferred to an object of lower temperature
what happens to the kinetic energy of the atoms when it heats up
kinetic energy increases and the atoms move faster
what has happened to the mass of the atoms when heated
it stays the same
what happens to the volume of the atoms when heated
increases (thermal expansion)
what happens to the thermal energy of an object. as its temperature rises
when the temperature of an object increases, the kinetic energy of its particles also increases
law of conservation energy
energy cannot be created or destroyed, it can only change form
