idea of the first law of thermodynamics? A. Energy can be created or destroyed, but it can also change forms. B. Energy can be created but not destroyed. C. Energy can be destroyed but not created. D. Energy can't be created or destroyed, it just changes forms.

The correct answer is D. Energy can't be created or destroyed, it just changes forms.<br /><br />The first law of thermodynamics, also known as the law of conservation of energy, states that energy cannot be created or destroyed, only transformed from one form to another. This means that the total amount of energy in a closed system remains constant, even as it changes from one form to another. For example, when a ball is thrown upwards, its kinetic energy (energy of motion) is converted into potential energy (stored energy) as it rises. When the ball reaches its maximum height, all of its kinetic energy has been converted into potential energy. As the ball falls back to the ground, its potential energy is converted back into kinetic energy. Throughout this process, the total amount of energy in the system remains constant, demonstrating the first law of thermodynamics.