Transcript Heat, Temperature & Thermal Energy

Review of :
Heat, Temperature &
Thermal Energy
Heat


flow of energy from objects
Heat is a _______
higher
at a _________
temperature to objects at
a __________
temperature.
lower
Soon after you put ice cubes into a pitcher
of lemonade, energy is transferred from
lemonade to the colder
the warmer _________
ice
____.
HEAT FLOWS FROM WARMER  COOLER!!!
Temperature
Temperature is a measure of the
average kinetic energy of all the
__________
particles in an object.
 If a liquid, such as hot cocoa, has a high
temperature, the particles in the liquid are
Very fast
high
moving __________,
and have a _______
average kinetic energy.
 If a drink, such as a fruit smoothie, has a
low temperature, the particles in the
More slowly
liquid are moving
_________ and have a
low
_______
kinetic energy

Thermal Energy
total kinetic
Thermal energy is the _______
energy of particles in an object.
 Note that temperature and thermal
energy are different from each other.
average while
Temperature is an __________
thermal energy is a ______.
total
 A glass of water may have the same
temperature as the Mississippi River, but
less thermal energy because
will have _____
there are less water particles in the glass
of water.

Review of
Conduction, Convection,
and Radiation
Conduction
Conduction is the process that moves
energy from one object to another when
physically
they are Touching
_______________.
 Conduction occurs any time that objects
different temperature come into
at a _________
contact with each other.
 Conduction can also occur within a single
object. In this case, energy is transferred
warmer part of the object to the
from the ______
cooler part of the object.
_______

Convection
Convection is the process that transfers
energy by the movement of particles in
liquid
the same direction in a _________
or
gas
____.
more dense will
 Cool air/water that is _____
less dense, air/water
push warmer, _____
upwards. Once that warm air/water
more dense once again
cools, it becomes _____
and settles back down to the bottom to
start the process all over again.

Radiation




Radiation is energy that travels as
electromagnetic waves, which includes
______________
visible light and microwaves.
Sun is the most significant source of
The ____
radiation that you experience on a daily
basis.
Like both conduction and convection,
radiation can transfer energy from a warmer
______
cooler one.
object to a _______
However, radiation differs from conduction
and convection because radiation can travel
Empty space as it does when it
through ______________,
moves from the Sun to the Earth.
Quiz Practice!
A hot saucepan is placed on a cold bench.
Heat will flow from the saucepan to the
bench until
A.
B.
C.
D.
the bench is warmer than the
saucepan.
the bench is as hot as the saucepan
was.
the saucepan has lost all of its heat.
the saucepan and bench are at the
same temperature.
A candle is lit. The heat of the flame will
melt the candle because
A.
B.
C.
D.
the heat of the hot flame is
transferred to the colder candle.
the wax of the candle is repelled by
the flame.
the candle must stay hot to heat the
flame.
the flame takes all the heat energy
and the candle has no energy.
Which types of heat transfer involve heat
flow from hot objects to colder objects?
A.
B.
C.
D.
convection, conduction, and radiation
conduction and radiation, but not
convection
convection and conduction, but not
radiation
convection and radiation, but not
conduction
Heat will flow from a hot object to a cold
object until the objects reach
A.
B.
C.
D.
Boiling point.
stability.
collapse.
The same temperature.
Ice is placed in hot water. What happens to
the temperature of the ice and the water?
A.
B.
C.
D.
The ice gets warmer, and the water
gets cooler.
The ice gets warmer, and the water
stays the same.
The ice and the water both get cooler.
The ice gets cooler, and the water gets
warmer.
When you hold a cup of warm water, your
hands get warmer. Why does this
happen?
A.
B.
C.
D.
Heat
Heat
Heat
Heat
transfers
transfers
transfers
transfers
by
by
by
by
convection
conduction
condensation
radiation
The total energy of all particles in a
substance is called –
A.Temperature
B.Thermal
C.Degrees
D.Mass
energy
Heat flows –
A.Only
from warmer objects to cooler ones
B.Only from cooler objects to warmer ones
C.Both ways between objects that are not
at the same temperature
D.Between all objects all the time
regardless of their temperature
Heat is transferred from one particle of
matter to another through the movement
of fluids in a process called –
A.Conduction
B.Convection
C.Radiation
D.Insulation
Which kind of heat transfer takes place
when you put a spoon in a cup of soup
and the spoon gets hot to the touch
A.Convection
B.Conduction
C.Deduction
D.Radiation
Which kind of heat transfer can occur
through space
A.Radiation
B.Conduction
C.Convection
D.Deduction
Which kind of heat transfer occurs when
you add hot water to a cold bath?
A.Radiation
B.Conduction
C.Deduction
D.Convection
It is a cold winter day. You’ve been out
playing, and you warm you hands in front
of the fire in your fire place. Which kind
of heat transfer is this?
A.Conduction
B.Deduction
C.Radiation
D.Convection