UNITS
mass
grams
the state of matter with the least particle motion
solid
when you add heat energy to a solid and it turns into a liquid
melting
when you add heat energy to a substance, does the temperature always increase?
no
you add 2 substances to a beaker.
substance A is less dense than substance B.
which substance will be on the bottom of the beaker?
substance B
volume
cm3, m3, mL, L
the state of matter where particles can flow past one another but cannot fill the container
liquid
when a gas turns into a liquid
condensation
when a phase change graph shows a plateau (flat section), what is happening at the plateau?
phase change
why do objects float?
because the density of the object is less than the substance it is placed in
velocity
m/s & direction
the state of matter where particles collide, move freely, and take up the space and shape of the container
gas
when a liquid turns into a gas
vaporization
on a cooling curve, if energy is lost from a gas, what state of matter will it become?
liquid
why do objects sink?
because the density of the object is greater than the substance it is placed in
density
the state of matter that takes the shape of its container and is made of charged particles
plasma
when a solid turns into a gas
sublimation
during our phase change of water lab, what temperature did the ice and water start at?
0⁰C
what is the density of an iceberg if it has a mass of 120kg and a volume of 125m³?
0.96 kg/m³
acceleration
m/s2 & direction
the state of matter of water at 120⁰C
gas
when a gas turns into a plasma
ionization
do all phase change graphs have the same shape? why?
no, each substance has phase changes at different temperatures and pressures so the phase change graph will not have the same shape
if an object has a high density, what does that mean for its particles?
they are very close together - there are a lot of particles in a small space