An ecosystem is a geographic area where plants, animals, and other organisms, as well as
weather and landscape, work together to form a bubble of life. Ecosystems contain biotic or
living, parts, as well as abiotic factors, or nonliving parts. Biotic factors include plants, animals,
and other organisms.
The energy flow takes place via the food chain and food web. During the process of energy flow in the
ecosystem, plants being the producers absorb sunlight with the help of the chloroplasts and a part of it is
transformed into chemical energy in the process of photosynthesis.
The nitrogen cycle is a repeating cycle of processes during which nitrogen moves through both living and non-living
things: the atmosphere, soil, water, plants, animals and bacteria. In order to move through the different parts of the
cycle, nitrogen must change forms.
The carbon cycle is nature's way of reusing carbon atoms, which travel from the atmosphere into organisms in the
Earth and then back into the atmosphere over and over again.
The water cycle shows the continuous movement of water within the Earth and atmosphere. It is a complex system
that includes many different processes.