Activity Detail
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Muddy Water - Adventure 8
 


Activity Overview

Students use a light sensor to analyze the effect of storm water run-off on the turbidity of local water. They interpret and analyze scatter plots and understand exponential relationship.

Before the Activity

  • Connect CBL 2™ to the calculator.
  • Plug light sensor into channel 1 of the CBL 2
  • Launch the DataMate program
  • See the attached PDF file for detailed instructions for this activity
  • Print pages 52 - 53 from the attached PDF file for your class
  • Transfer files to student calculators using TI-Navigator™  "send to class" feature


    		• During the Activity

    		Distribute the pages to your class.

    Follow the Adventure procedures:
    Collect Data:
  • Align the flashlight, container of water, and the CBL 2 light sensor so that the light passes through the container of water directly into the light meter
  • Put 10 g of dirt in the water and stir
  • Note the amount of light transmitted to the light meter
  • Repeat the steps until 50 g of dirt have been added to the water
  • Record the light reading for each test
  • Graph the data as a scatter plot
  • Trace the points on the plot and explore graphs of exponential functions
  • Understand how water clarity decreases the most with the initial-run off

    		After the Activity

    		Students analyze the results and answer the questions in the worksheet

    Review student results:
  • As a class, discuss questions that appeared to be more challenging
  • Re-teach concepts as necessary

    		Other Downloads




    view standards alignment
    view textbook alignment

    Subject Area:
    Science : Earth Science : Earth's Surface
    Math : Algebra I : Exponential Functions
    Math : PreAlgebra : Nonlinear Functions

    Author:
    Texas Instruments

    Level:
    5-8

    Activity Time:
    45 Minutes

    Device:
    TI-73 Explorer™, TI-Navigator™

    Apps:
    DataMate

    Software:
    TI Connect™

    Accessories:
    CBL™/CBL 2™, Sensor - Light, TI Connectivity Cable, Unit-to-Unit link cables

    Other:
    This is Adventure 8 from the EXPLORATIONS Book:
    Adventures in Data Collection with TI-73 Explorer™.

    The following materials are required for this activity:

  • Light sensor
  • Clear 1000 ml container
  • 50 g of dirt
  • Spoon or scoop
  • Stirrer
  • Flashlight


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