Short and easy definition of water cycle, nitrogen cycle, carbon cycle, and phosphorus cycle.

I actually dont have the time right now but if you look up definition of (word) the definition will come up. Just put it into a shorter version!

Water cycle-the cycle of processes by which water circulates between the earth's oceans, atmosphere, and land
Nitrogen cycle-the series of processes by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation and decomposition
Carbon cycle- the series of processes by which carbon compounds are interconverted in the environment
Phosphorus cycle- The phosphorus cycle is the biogeochemical cycle that describes the movement of phosphorus through the lithosphere, hydrosphere, and biosphere.

An autotrophic protist - they can perform photosynthesis and mainly consist of unicellular algae. they can be divided into number of systematic group according to the shape of their cell and the type of photosynthetic pigments they use.