How does lightning help to add nitrogen to the soil?

It kills the bacteria that remove nitrogenCorrect answerYour answerIt splits water into hydrogen and nitrogenCorrect answerYour answerIts heat joins nitrogen and oxygen into oxides, which rain carries down as nitratesCorrect answerYour answerIt melts rocks that contain nitrogenCorrect answerYour answer

Show the answer and explanation

CorrectNot quiteAnswer C

Correct answer: C

Nitrogen gas is very unreactive, but the great heat of a lightning flash makes it combine with oxygen.
The nitrogen oxides dissolve in rain and reach the soil as nitrates. This is atmospheric nitrogen fixation.

Worth noting

Water contains no nitrogen, so it cannot be split into nitrogen.

Concept: Atmospheric nitrogen fixation
Typical timeTypical: 60 s
Your timeYours: —

The rule this testsNutrient cycles

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How does lightning help to add nitrogen to the soil?

Explanation