atmosphere
The water cycle occur between the earth and the air. It is a cyclic process.
The day/night cycle results from the Earth rotating.
water cycle
The water cycle is also called the hydrological cycle, and it describes the continuous movement of water on, above, and below the surface of the Earth.
Water cycle.
This is the water cycle on the Earth.
Precipitation.
The Kreb's cycle also called the Citric acid cycle - a process that creates ATP.
These are parts of the water cycle on the Earth.
pistil
The Calvin cycle, or carbon fixation, occurs during the dark reactions of photosynthesis.
This is called the follicular phase.