Question

The _____ law of thermodynamics states that energy can't be created or destroyed. Two natural sources of energy on Earth are the _____.

first, Sun and core of Earth
second, Sun and rock
second, Sun and biosphere
third, core of Earth and hydrosphere

Answer 1

The **first** law of thermodynamics states that energy can't be created or destroyed. Two natural sources of energy on Earth are the **Sun and core of Earth**.