Transcript Temperature, Heat, and Thermal Energy

Temperature, Heat,
and Thermal Energy
How do particles move as
they get warmer?
Cooler?
Estimate:
The temperature of the
room.
The temperature outside.
What do we learn when
we read a thermometer?
 This question will be answered throughout
our study of temperature, heat, and
thermal energy.
Activity
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3 bulb thermometers
1 temperature sensing sheet (yellow dot)
1 temperature sensing sheet (red dot)
3 foam cups
Warm water
Cool water
Shallow pan
Towel or paper towels
What part of the
thermometer actually senses
the temperature?
 The bulb at the end is the sensitive part
 It contains alcohol, colored red; this
expands as the temperature rises. The
alcohol is forced into a very then tube
that contains only a very small amount of
alcohol compared with the bulb.
Is your hand warmer than the
air in the room or cooler?
 The thermometer in air reads about 22 C.
Wrapping a hand around it raises it to
about 30 C. Therefore, people are
warmer than a typical room.
Measure the temperature of
various things and record
them in the chart
Items
Air in the room
Cold water
Warm water
Your hand
Temperature (C)
A temperature sensing sheet is
another kind of thermometer.
Its color is different at different
temperatures. Describe the
effect you have on each of the
sensing sheets when you
touched them.
 Depending on the where you touch the paper
(front or back), the color changes…..darker
blue or violet. When you stop touching it, that
area changes color back to the same as the
rest of the sheet.
Study one temperature sensing sheet
as it warms (when your hand touches
it) and cools (after you release it). Is
“brown” warmer than “green” or
cooler?
 Brown is cooler than green.
Using the same temperature
sensing sheet, name 4 colors that it
can be. Put those colors in order
from warmest to coolest.
 The full range of colors from warmest to
coolest are:
 Violet, dark blue, blue, green, tan, brown,
and black
How are the two sensing
sheets the same and how are
they different?
 Each sheet is brown and tan when it is
“cool” and blue when it is “warm”. Each
sensor sheet has a different range of
sensitivity. According to the “red dot”
sheet, 25 C is “warm”; according to the
“yellow dot” sheet, 25 C is “Cool”