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4
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nitrogen gas becomes nitrate and can be taken in by plants.
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5
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a series of gases surrounding earth.
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6
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organisms that break down dead or rotting organisms.
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8
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between 75% and 80% of this is nitrogen.
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9
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chemical element atomis number 7 with symbol N.
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10
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organic nitrogen from dying plants and animals is turned into ammonia and ammonium
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11
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The conversion of ammonium to nitrate.
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12
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bacteria or fungi turns the organic nitrogen from dead plants or animals back into ammonium
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13
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nitrates are changed to nitrites and then to nitrogen gas and ammonia.
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14
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the process of nitrogen being converted between itsmany different chemical forms
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