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Thursday: January 26,2017
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Please get Science Journals
Review “Thermal Energy” Voc.
“Thermal Energy” Notes Activity
Thermal Energy Sort Exit Ticket
Heat Transfer
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Introduction – BBC Bitesize
Check out the video
“Conduction, Convection, and Radiation”
from BBC Bitesize.
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Heat Transfer
There are three types of heat
transfer:
1. Conduction
2. Convection
3. Radiation
Can we have
three methods
of heat transfer
at once?
YES!
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Conduction
1. Conduction – Transfer of heat through matter by the
direct contact of particles.
Imagine it is very cold outside
and you walk to school.
Happens most
As soon as you come inside,
frequently in
solids, because I hand you a mug of hot
in solids the
particles are
chocolate. What happens to
packed closely
your cold hands?
together.
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Conduction
Can you think of
some more
examples of heat
transfer through
direct contact?
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Convection
You’re visiting your grandparents and find
an old lava lamp. Groovy! You plug it in.
After a few minutes, globs of a thick,
colored liquid begin to rise from the base.
When each glob gets to the top, it falls
back down.
• What do you think is happening?
• Is this a method of heat transfer?
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Convection
One way that liquids and gases differ
from solids is that they can flow. (What
does flow mean?) This makes them
fluids.
Convection – heat transfer in a liquid or gas
by flowing movement of heated particles
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Convection
In convection, the particles
actually rotate and move
from one place to another.
Warm fluids rise while
cooler ones sink.
How is this different from
conduction?
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Radiation
You go out to the pool for a nice morning
swim. You jump in, and the water is
freezing! Brr! You get in the pool again
later that hot and sunny afternoon, and
the water is several degrees warmer
than it was before.
• What happened?
• Is this a form of heat transfer?
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Radiation
Where does all of earth’s heat
energy come from?
• Conduction and convection require
matter (solid, liquid, or gas) to
transfer heat.
• However, there is very little matter
between us and the sun.
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Radiation
Radiation is the
transfer of energy by
electromagnetic
waves.
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Left Side – Guided Practice
Directions: Classify each example as conduction,
convection, or radiation and write your answer in
the chart.
Conduction
Convection
Radiation
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Left Side – Guided Practice
Example 1: A pot sitting on a hot burner
Example 2: Touching a metal spoon that
is sitting in a pot of boiling water
Example 3: A person placing their cold
hands over a warm fire
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Left Side – Guided Practice
Example 4: Picking up a hot cup of coffee
Example 5: Using an electric blanket to
get warm
Example 6: Putting your wet shoes on a
floor vent to dry them faster.
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Left Side – Guided Practice
Example 7: Lying out in the sun to get a
tan
Example 8: Macaroni rising and falling in
a pot of boiling water
Example 9: Cold water sinking and warm
water rising in the ocean
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Left Side – Guided Practice
Conduction
Ex 1: A pot sitting on a
hot burner
Ex 2: Touching a metal
spoon that is sitting in a
pot of boiling water
Ex 4: Picking up a hot
cup of coffee
Convection
Ex 8: Macaroni rising
and falling in a pot of
boiling water
Radiation
Ex 3: A person placing
their cold hands over a
warm fire
Ex 9: Cold water sinking Ex 5: Using an electric
and warm water rising
blanket to get warm
in the ocean.
Ex 7: Lying out in the
sun to get a tan
Ex 6: Putting your wet
shoes on a floor vent to
dry them faster
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Independent Practice
Gallery Walk
On your own, complete the worksheet for
the gallery walk.
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Exit Slip
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