pure substances
what is homogenous
same throughout
what is kinetic energy?
energy through motion
what is matter made up of?
made up of tiny particles/ atoms
what are phase changes an example of?
example of physical changes
how is heat transferred?
transferred due to a different temp
what are elements made up of
atoms (only one kind of atom)
what is potential energy?
stored energy
what are three types of phases?
solid, liquid, gas
how does a phase change start?
by altering the temp
formula for finding how much heat was gained or lost?
q= mc^t
(^=delta)
what is matter
anything that takes up space
what is thermal energy?
energy through heat
how are particles packed?
- solid
packed tightly
what is specific heat?
the amount of heat needed to raise the temp of 1 gram by 1 c (Celsius)
energy that is able to be used is kinetic energy
false
what is heterogenous?
different throughout
what is exothermic?
Realesing heat
how are particles packed?
- liquids
packed together but not tight and there's space in between
what is heat?
the transfer of kinetic energy
can energy be transferred? yes or no
yes
what are compounds ?
what are mixtures?
compounds- chemically combined
mixtures - physically combined
what is endothermic?
energy is absorbed
how are particles packed?
- gas
spread far apart
definition of phase changes
a physical process in which a substance goes from one phase to another
potential energy is for cold
true or false
false
potential energy (heat)