science Flashcards
average kinetic energy present in a system
thermal energy
energy that is transferred from one body to another as the result of a difference in temperature
heat
measure of hotness or coldness of an object
temperature
describes the flow of heat (thermal energy) due to temperature differences and the subsequent temperature distribution and changes
heat transfer
the process by which heat occurs through a medium from one point to another
conduction
the transfer of heat through the actual physical movement of fluid
convection
the transfer of thermal energy by the electromagnetic (EM) waves
radiation
basic property of matter carried by some elementary particles that governs how the particles are affected by and electric or magnetic field.
Electric charge
coulomb (c)
electric charge
law of charges
like charges repel opposites attract
the principle that the total electric charge in an isolated system never changes
law of conservation of charge
when insulating materials rub against each other, they may become electrically charged
charging by friction
a method used to charge an object without actually touching the object to any other charged object
charging by induction
involves the contact of a charged object to a neutral object
charging by conduction
the action of changing location or position
motion
like a composite photo that shows the position of an object at several equally spaced time intervals
motion diagram
the total length of path traveled by a moving object regardless of the direction of motion
distance
the objects change in position going to a particular direction
displacement
defined as the distance covered per time of travel
speed
computation of speed
s=d/t
is when speed is accompanied by direction
velocity
plant cell
matthias schleiden (1838)
animal cell
theodore schwann (1855)
similarities
DNA, Plasma membrane, Cytoplasm, Ribosomes