Consider the Sun and Earth as a single system. How does the law of conservation of energy apply to this system?
A The energy from the Sun that reaches Earth is destroyed by Earth.
B The energy from the Sun does not affect the balance of energy on Earth.
C The Sun creates energy, which subsequently reaches Earth and adds to Earth’s total energy.
D All the energy that reaches Earth from the Sun was originally contained within the Sun’s atoms.
The correct answer is D.
The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another. In the context of the Sun and Earth as a system, the energy emitted by the Sun is generated through nuclear fusion processes that occur within the Sun’s atoms. When this energy, in the form of light and heat, travels to Earth, it is not created anew; it is simply transferred. Therefore, all the energy that reaches Earth from the Sun was originally contained within the Sun’s atoms, illustrating the principle of energy conservation.
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