The Technology Muscle Car of Science Education

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The Technology Muscle Car of Science Education
Computer Based Labs
Mack Bailey Rock Hill High School
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• Purpose Share activities using technology for
  education.
• Technology is often used for the sake of
  technology, not for the sake of learning just
  as fancy wheels, shiny manifolds, chromed
  exhausts are often used for show not for go!?
• However, students respond favorably to a variety
  of creative activities that are true to the
  science concepts if the rubber meets the
  road!

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• Boyles Law as an example.
• Lets pretend were a middle or high school
  physical science, physics, or chemistry class.
• Well start with a little song, discuss some
  theory, carry out a lab, analyze our data, share
  our results and suggestions!

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• A state variable is a property of the system
  that depends only on its present state. A state
  variable does not depend in any way on the
  system's past (or future). In other word, the
  value of a state variable does not depend on how
  a system arrived at the present state it depends
  only on the characteristics of the present
  state. Chemistry, Zumdahl and Zumdahl, Houghton
  Mifflin Co., 2003
• Three State Variables P, V, and T. HOLY MOL-EE,
  from Sing Smart

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• Ideal Gas Law
• pV nRT
• Constant amount of gas in a container (n)
• Constant (room) temperature, more or less (T)
• R is the gas constant
• So, pV is a constant pV k, p k/V
• Inverse relationship of p and V

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• Focus on p and V.
• Experimentally develop a relationship between p
  and V.
• Clean, reliable experiment
• And well do some variations, time permitting.

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• Cable and adaptor for CBL to sensor
• AC Adaptor for CBL
• CBL-to-TI cable (black 180 for TI-84, 90 for
  TI-83)
• TI to laptop cable (gray or fancy USB)

• You and your partner will need
• CBL unit
• TI calculator
• Laptop
• Pressure sensor with syringe

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• Assemble equipment per diagram and procedures.
• Generate about six data points,
• Then exchange roles and collect six more data
  points OK to duplicate points.

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http//www.personal.psu.edu/ faculty/j/x/jxt18/Sci
WkshopWeb /lesson_6.htm
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• Transfer your data to the laptop via LoggerPro
• Use gray or fancy cable
• Open LoggerPro software on laptop
• Cancel windows then select the calculator icon
• For gray, use Com1 for fancy, use the USB. . .
• Select your two lists, L1 and L2

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• Double-click on head of data column and add
  title, unit, etc.
• Double-click graph, itself, to get rid of
  connecting lines (Connect Points)
• Evaluate inverse relationship add calculated
  column
• Data
• New Calculated Column
• Modify labels and units
• Equation will be 1/volume
• Double-click on y-axis again and select new
  variable
• Adjust for 1mL extra volume in tubing?!

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• Higher level variation non-ideal gas
  behavior!
• Fill syringe with butane by pulling plunger out
  and allowing gas to enter replace plunger and
  warm by shaking and holding in hand.
• Open valve to let some gas out by pressing
  plunger down about 1/5 of way.
• Repeat data-gathering process!

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• When are CBLs best utilized?
• Especially for labs when specific and/or short
  time increments are important motion,
  temperature trends, etc.
• When many, many data points are to be taken.
• When environment makes it dangerous to use
  traditional equipment (freezing point)

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• Problems with CBLs
• May not help develop graphing and data analysis
  skills
• Seem to be less concrete exposure to parameters
  lose concept
• Finicky!!

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• Experiment with LoggerPro to make pretty graph
  and maybe do a linear or curve fit.
• List two other possible variations.
• Suggest two other uses youve done, seen, or
  thought of for CBLs!
• Go home and REV UP your MUSCLE CAR!

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• Resources
• http//www.vernier.com/index.html
• Toll-free phone [phone]
• E-mail info_at_vernier.com
• http//education.ti.com/educationportal/
• http//www.sing-smart.com/
• Telephone[phone]
• E-mail Lynda_at_Sing-Smart.com
• Pamphlet

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• THE MUSCLE CAR
• Olds 442
• 4 barrel
• 4 speed
• Dual exhaust

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