Which statement best describes the law of conservation of energy?

O

A. The total energy in an open system can only increase.

B. Energy cannot be created or destroyed.

C. Energy cannot change forms.

O

O

D. The total energy in a dynamic system can only decrease.

The correct option is B. Energy cannot be created or destroyed.

Explanation:

The law of conservation of energy states that energy can neither be created nor be destroyed. However, energy can change from one form to another.

Hence, in a system energy might change forms but the total energy on Earth remains the same.

In a food chain, most of the energy is lost as heat. But it still is a form of energy. Hence, energy is neither created nor destroyed, it only changes forms.