Earth, unlike the universe, is not a closed system because energy is constantly entering through the atmosphere and being trapped in by the greenhouse gases. While this may not initially seem reasonable because Earth is often referred to as a “system”, it is not a closed system which is the pivitol part of the Law of Conservation of Energy. Earth’s energy is constantly changing due to solar energy that is entering every moment, and because of this, we can see that Earth still abides by this law.
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