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Lakes Habitats and Ecosystems Ecology Biology Science
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  • ACTIVITY

    Hard or Soft Water?

    Students determine the hardness of two water samples, labeled only as A and B.…
    Grade:
    6,
    7,
    8,
    9,
    10
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    Subjects:
    Science
    Electricity
    Electricity and Magnetism (Electromagnetism)
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