<span>1. nitrogen
</span>a biogeochemical cycle that cycles material by fixation, assimilation, ammonification, nitrification, denitrification, and the food chain <span>
2. phosphorus
</span>a biogeochemical cycle that cycles material by weathering, erosion, tectonic activity, and the food chain
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3. tectonic
</span>a geochemical cycle that cycles material by mantle convection, subduction, and seafloor spreading <span>
4. carbon
</span>a biogeochemical cycle that cycles material by photosynthesis, respiration, and the food chain <span>
5. hydrologic
</span>a biogeochemical cycle that cycles material by evaporation, condensation, precipitation, and transpiration <span>
6. rock
</span>a geochemical cycle that cycles material by weathering, erosion, deposition, cementation, and metamorphism
Hope this answers the question. Have a nice day.
We exist because we all have a purpose, sometimes in life humans face challenges that contemplates past decisions and their future; they contemplate life. we exist to fulfill our dreams, without a dream, without a goal we can’t fulfill it. we exist from our mother womb, and born into a world of life. so to say “why do we exist” we exist to create dreams and goals. to fulfill them, to experience life.
The Abyssal Zone
The abyssal zone or abyssopelagic zone is a layer of the pelagic zone of the ocean. "Abyss" derives from the Greek word ἄβυσσος, meaning bottomless. At depths of 3,000 to 6,000 metres (9,800 to 19,700 ft), this zone remains in perpetual darkness.