Summary #4

There are many cycle. But the more importants are water cycle, carbon cycle, and nitrogen cycle. The water cycle begins with evaporation. Next with condesation that includes precipitation also . Then the freezing. Finally the evaporation again. TThe carbon cycle includes the living things and some gases. The persons , fire and cars give to the plants CO2 and the plants need it to grow. And the plants give us HO2 for survive. Finally we hhave the nitrogen cycle. It begins with the atmosphere . Then it goes to the soil that  creates the ammonia the the nitrites and finally the nitrates. After we start over. The nitrogen is the more necesary of the gases.