Question

1. which is a correct statement regarding the law of conservation of energy?

the law of conservation of energy is only true in an open system.
when energy changes forms, a small amount of energy is lost in a closed system.
energy can change forms; however, the amount remains the same.
solar energy and thermal energy are the only energy transfers that occur without causing energy to be lost in a closed system.

Explanation:

The law of conservation of energy states that energy cannot be created or destroyed, only transformed from one form to another, with the total amount of energy in a closed system remaining constant.

• The first option is wrong because the law holds for closed/isolated systems, not open systems.
• The second option is wrong because no energy is lost in a closed system during energy transformation (energy may be converted to less useful forms like heat, but it is not lost).
• The fourth option is wrong because all energy transformations in a closed system follow conservation, not just solar and thermal transfers, and no energy is lost in closed systems during these processes.

Answer:

Energy can change forms; however, the amount remains the same.