character: Nitrogen Cycle Overview
topic: Understanding the Nitrogen Cycle and its importance in ecosystems
grade: 9
subject: Science
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character: Nitrogen Fixation
topic: The process through which nitrogen gas is converted into ammonia by bacteria
grade: 9
subject: Science
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character: Nitrification
topic: The conversion of ammonia into nitrites and nitrates by soil bacteria
grade: 9
subject: Science
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character: Denitrification
topic: The process by which nitrates are converted back into nitrogen gas, completing the cycle
grade: 9
subject: Science
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