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Which way does heat transfer?
from the cold to the warm
from the less hot to the hottest
from the colder to the coldest
from the hottest to the less hot
when does heat transfer stop happening?
When the temperature finally evens out
never
when there is no energy left to transfer
IDK
Does radiation requires matter to travel through?
maybe
Nope
yes it does.
it depends how much heat
Does conduction need contact to happen?
never!
nope
it depends of how hot
yes
What is temperature?
what we measure with a barometer
the transfer of thermal enery
The average kinetic energy of matter
the energy that makes molecules vibrate
When warm air raises up, what kind of heat transfer is that?
conVIction
convection
conduction
radiation
What happens when you add thermal energy to air?
the molecules contract
the gases in the air cool down
molecules in the air move faster and air expands
the gas molecules move slower
How does gravity help convection?
lighter matter sinks
matter that is more dense floats
Denser matter sinks because of gravity
denser matter is attracted by space
which way heat is transferred in this picture?
Heat transfers from ice cube to hand
cold transfers from ice cube to hand
heat transfers from hand to ice cube
Cold molecules burn your hand
What is a thermometer for?
to measure density
To measure the cold rays
to measure mass of an object
To measure the average thermal energy
What are fluids?
gases
liquids
solids and gases
Liquids and gases
what blocks energy transfer?
water
a good conductor
an insulator
metal
which one is the best insulator?
Iron
ceramic
styrofoam
gold
The total kinetic energy of all the particles in a substance is
temperature
thermal energy
heat
radiation
Hot air
spreads out
becomes less dense
all of the above
rises
Which is not an insulator
copper
plastic
air
rubber
