Describe how you could use a globe and your hand to model the path of a global convection current in the atmosphere.

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.

d. changes in climate and historical records

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i do believe the correct answer would be the third one. location c, because earth is tilted away from the sun at this time

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the correct answer is: " ventricles " .

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