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A c t i v i t y 3 – D u e l i n g S e n s o r s :
W h i c h T e m p e r a t u r e i s W h i c h ?
Math Concepts
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Real-life linear equation
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Collecting and analyzing temperature data
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Graphing and interpreting graphs
Materials
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CBL 2™
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TI Graphing Calculator
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6-inch unit-to-unit link cable (or any length)
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2 temperature sensors
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cup of lukewarm water
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cup of ice
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tape or one twist tie
Introduction
In this investigation, you will start with a glass of lukewarm water and add ice
cubes to cool the water to a refreshingly cold temperature. Two temperature
sensors will be used to take measurements in degrees Celsius and degrees
Fahrenheit. From the data gathered, you will investigate the Celsius-to-Fahrenheit
conversion formula which is a linear equation in the form Y=AX+B.
Set-up
Have one cup of lukewarm water and one cup with ice ready to use. Two
temperature sensors should be attached, with tape or twist tie, about 5 cm from
their tips. The sensors will be placed in the cup of lukewarm water. Since the ice will
be added to the cup of lukewarm water, be sure to leave room for ice. You will
need to keep the two sensors close together so they are measuring as close to the
same part of the liquid as possible.
© 2000, 2003 T
I
EXAS
NSTRUMENTS
Science Concepts
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NCORPORATED
Measurement and conversions
Data collection
Physical science – temperature
G
S
ETTING
TARTED WITH THE
CBL 2™ S
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YSTEM
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