Earth can be considered as a closed system, since it only receives sunlight (energy), while the overall mass stays constant, without (almost) any exchange from space. Another example of a closed system is a saucepan or frying pan, on a stove, when its lid is closed.
Its important so that no one person has to much power
New york
i think im sure about this answer
It started 476 a.d thats the answer
