using adi to quantify a color change in crayfish
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USING ADI TO QUANTIFY A COLOR CHANGE IN CRAYFISH. Jennifer Welborn. Do Crayfish Change Color If Their Environment Changes? A Guided Inquiry Lab for 7 th grade Life Science. - PowerPoint PPT PresentationTRANSCRIPT
USING ADI TO QUANTIFY A COLOR CHANGE IN CRAYFISH
Jennifer Welborn
Do Crayfish Change Color If Their Environment Changes?
A Guided Inquiry Lab for 7th grade Life Science• Background: There is anecdotal evidence from bass fisherman
that crayfish are able to change color depending on their surroundings. A (cursory ) literature review of this phenomenon showed that no formal research has been done in this area. Students had an additional informal lesson about research funding (or lack thereof) because of this finding.
• Students designed and conducted a controlled experiment to
see the effect of changing environment color on crayfish color.
• ADI was used to quantify a color change.
Frameworks Alignment
• Science Inquiry Skills are part of the Massachusetts frameworks for Science and Technology as well as the New Generation Science Standards
Grades 6–8 Formulate a testable hypothesis. Design and conduct an experiment specifying variables to be changed, controlled, and
measured. Select appropriate tools and technology (e.g., calculators, computers, thermometers, meter
sticks, balances, graduated cylinders, and microscopes), and make quantitative observations.
Present and explain data and findings using multiple representations, including tables, graphs, mathematical and physical models, and demonstrations.
Draw conclusions based on data or evidence presented in tables or graphs, and make inferences based on patterns or trends in the data.
Communicate procedures and results using appropriate science and technology terminology.
Offer explanations of procedures, and critique and revise them.
First week of Life Science– Science as a Way of Knowing: Inquiry Unit-- student pairs make qualitative and quantitative observations of
their crayfish
Second Week– Students design and conduct a controlled experiment with crayfish and use ADI to
quantify a color change
Download ADI and click on Spatial Analysis
Click on File and Choose Open Picture
Choose None
Make sure to photographlabels so that photos can beIdentified later
Choose rectangle tool
Record the R, G, B values on a table. These are the values of the color of the crayfish after it is has been on dark rocks for 3 days and has just been transferred to light rocks.
Draw a rectangle whichlies just inside the SHARPIERectangle on the crayfish
Click on graph colors
Graph of R, G, B values of the image of the crayfishafter it had been on dark rocks for 3 days.
Click on enhance colors
Choose red vs blue normalized,But play around with the otherOptions first!
Graph of red vs blue normalized afterthe crayfish was on dark rocks.
Choose Open Picture to open the “after” picture
Record the new R, G, B values in the data table. These are the values of the color of the crayfish after it has been on light rocks for 3 days.
New graph of R, G, B values!
Red vs blue normalized image afterCrayfish has been on lighter rocks..Hmmm……….
Graph of red vs blue normalized afterCrayfish has been on lighter colored rocks