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A c t i v i t y 6 – N i g h t a n d D a y
Math Concepts
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Data to graph to model visualization
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Number sense to determine length of
experiment
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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Stainless steel temperature sensor and TI light sensor
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Power supply such as the TI-9920 AC adapter, or Vernier's CBL-EPA External Power adapter with a
power source such as a 6-volt battery (Optional)
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TI-GRAPH LINK™ with cable (Optional)
Note: The voltage sensor might be used with a solar cell or in a circuit that measures
conductivity as it relates to changes in climate (the conductivity of a banana battery as
the room heats or cools). Other sensors are designed for weather data such as
Barometric Pressure and Relative Humidity. Check out the TI web page for a listing of all
sensors available for the CBL 2 at education.ti.com/cblprobes. Use the TI-9920 AC
adapter to supply power for the CBL 2 for long term data collection, or to power a
particular sensor use, Vernier's External Power Adapter CBL-EPA.
Introduction
In this investigation, we will set up a simple weather station to collect data over the
period of a day from two sensors to help us better understand patterns in the
weather.
Before We Start
1.
With your lab partner or in a small group, discuss why we want to collect
weather data over the period of a day. On a separate piece of paper, write
down the group's thoughts.
2.
In your group, make a hypothesis as to what will happen to the temperature
and the intensity of light during the experiment. Write down your hypothesis.
© 2000, 2003 T
I
EXAS
NSTRUMENTS
Science Concepts
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I
NCORPORATED
Measurement
Experience with sensors of different types, and
the units that relate to the measured values (such
as temperature in Celsius and Fahrenheit)
Experimental design and technique
Scientific method
Thermodynamics
Environmental science and the analysis of
ecosystems
G
S
ETTING
TARTED WITH THE
CBL 2™ S
79
YSTEM
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