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Earth and space science
Resource Type
Instructional Strategies
SMD Forum
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Educational Level:
High school  
Materials Cost:
$5 - $10  
Learning Time:
1 to 4 weeks  
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In this activity, student teams will create a controlled experiment by building ecosystems in two 2-liter bottles. Teams determine the control conditions of both bottles, identify a test variable, and run the experiment for several weeks to... (View More)

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