Transcript Edward W. Gunn

Edward W. Gunn
Physical Science
Grade Eight
Blairs Middle School
Standards of Learning (SOL)
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PS.1 & PS.7 – An Insulated
Cola Bottle
Objectives
In this experiment, the student will
investigate the insulating properties of aluminum
foil, newspaper, and styrofoam
 use a CBL System, and two temperature probes to
measure temperature
 determine change in temperature, Δt
 make a bar graph of Δt values
 compare the effectiveness of different insulation
materials
 build a well-insulated cola bottle
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MATERIALS
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CBL System
2 Vernier Temperature
Probes
2 Vernier Adapter
Cables
2 Slit Stoppers
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Glass Bottle
Aluminum Covered
Glass Bottle
Newspaper Covered
Glass Bottle
Styrofoam-covered
Glass Bottle
Hot Water
PROCEDURE
Part I – Investigating Insulation
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1. Obtain and wear goggles.
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2. Get 4 identical cola bottles. Wrap one with a layer of
aluminum foil (shiny side in), one with newspaper, and a
third one with styrofoam or another plastic material. One
of the four bottles will remain unwrapped.
3. Plug adapter cables into channels 1 and 2 of the CBL
System. Then plug probe 1 into the adapter in channel 1 of
the CBL and probe 2 into the adapter in channel 2.
4. Turn on the CBL Unit. Press PRGM and select
PHYSCI. Press enter, then press enter again to go to the
main menu.
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PROCEDURE continued
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5. Set up the CBL for two temperature
probes and two temperature calibrations.
Select set up probes from the main menu.
 Enter “2” as the number of probes.
 Select TEMPERATURE from the select probe
menu.
 Enter “1” as the channel number.
 Select USED STORED from the calibration
menu.
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PROCEDURE continued
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6. Set up the CBL for data collection.
Select COLLECT DATA from the main menu.
 Select TIME GRAPH from the data collection
menu.
 Enter “15” as the time between samples in
seconds.
 Enter “80” as the number of samples (the CBL
will collect data for a total of 20 minutes).
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PROCEDURE continued
Enter “30” as the minimum temperature.
 Enter “50” as the maximum temperature.
 Enter “5” as the temperature increment.
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7. Get 2 slit stoppers that properly fit your
bottles. Carefully fit the stoppers onto the
probes.
PROCEDURE continued
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8. Fill the uncovered bottle and the
aluminum-covered bottle with hot water,
allowing just enough space for the stoppers.
Be careful not to get the insulation materials
wet. A good way to fill the insulated bottles
and keep their insulation dry is to first
completely fill the uncovered bottle and
then use a funnel to transfer its contents to
an insulated bottle.
PROCEDURE continued
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9. Collecting Data
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Insert the slit stoppers and probes into the
proper bottles.
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Probe 1 – uncovered bottle
Probe 2 – aluminum-covered bottle
Allow the temperature probes about 45 seconds to
warm to the temperature of the water.
Press ENTER to begin data collection
PROCEDURE continued
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10. To record your data when data
collection is complete ( after 20 minutes):
Press ENTER to display a graph of temperature
vs. time for probe 1.
 Use  to examine the data points along the
curve. As you move the cursor right or left, the
time (x) and the temperature (y) values of each
data point are displayed below the graph.
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PROCEDURE continued
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Record the beginning (highest) temperature and
final (lowest) temperature (round to the nearest
0.10C).
Press ENTER to get a graph of temperature vs.
time for probe 2.
Use  to examine the data points along the curve.
Record the temperature range as you did for Probe
1.
PROCEDURE continued
Press ENTER, then choose yes to repeat the
procedure for the newspaper-covered bottle
and the styrofoam-covered bottle.
 Note: It is important to begin with the hot
water temperatures close to those in step 8.
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