So we need to put in the correct words to fill in the blanks. The FIRST law of thermodynamics states that energy can't be created or destroyed. It is a formulation of the law of conservation of energy modified for thermodynemical systems. Two natural sources of energy on Earth are the solar and wind. Also geothermal energy and hydropower are natural sources of energy.
The First Law of Thermodynamics states that energy cannot be created or destroyed, only transformed. Two natural sources of energy on Earth are solar energy and wind energy. These examples show how energy can be converted into usable forms while respecting the conservation principle of energy in physics.
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