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Carbon Cycle - CDOM Activity: Chromophoric Dissolved Organic Matter (CDOM)

Website Address:https://www.curriki.org/oer/Carbon-Cycle--CDOM-Activity-Chromophoric-Dissolved-Organic-Matter-CDOM--154010
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Learning RegistryLearning RegistryDistrict of Columbia, District of Columbia, US,
November 11, 2016
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Description:

In this laboratory activity, students investigate chromophoric dissolved organic matter (CDOM) through gradual dilution of black, green and chamomile tea. Through this activity, students discover how CDOM can dominate the absorption of sunlight, how sunlight degrades CDOM through photochemical oxidation, and how CDOM levels are related to nutrient status, stratification and mixing of the ocean. Materials needed include coffee mugs, hot water, spoons, and tea. This resource is found in Rising Tides, a journal created for teachers and students reporting on current oceanography research conducted by NASA, NOAA, and university scientists, featuring articles, classroom activities, readings, teacher/student questions, and imagery for student investigation of marine science.

Subjects:

    Education Levels:

    • Grade 1
    • Grade 2
    • Grade 3
    • Grade 4
    • Grade 5
    • Grade 6
    • Grade 7
    • Grade 8
    • Grade 9
    • Grade 10
    • Grade 11
    • Grade 12

    Keywords:

    Oceanography,NSDL,NSDL_SetSpec_ncs-NSDL-COLLECTION-000-003-112-115,Biological science,Earth Science,Photobleaching,Visible spectum,Life sciences:Ecology and ecosystems,Atmospheric science,Ultraviolet,oai:nsdl.org:2200/20140407123442683T,Life Science,Earth and space science:Earth structure:Ocean and water,Physical sciences:Chemistry,Dissolved organic matter,Chemistry,Physics,Earth and space science:Earth processes:Geochemical cycles,Earth system science,High School,Vocational/Professional Development Education,Geoscience

    Language:

    English

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    Public - Available to anyone

    License Deed:

    Creative Commons Attribution Non-Commercial Share Alike

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    In this laboratory activity, students investigate chromophoric dissolved organic matter (CDOM) through gradual dilution of black, green and chamomile tea. Through this activity, students discover how CDOM can dominate the absorption of sunlight, how sunlight degrades CDOM through photochemical oxidation, and how CDOM levels are related to nutrient status, stratification and mixing of the ocean. Materials needed include coffee mugs, hot water, spoons, and tea. This resource is found in Rising Tides, a journal created for teachers and students reporting on current oceanography research conducted by NASA, NOAA, and university scientists, featuring articles, classroom activities, readings, teacher/student questions, and imagery for student investigation of marine science.
    ↓http://phytoplankton.gsfc.nasa.gov/uploads/files/RisingTides_page49-50.pdf

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