Question

what do you know about the law of conservation of energy? check the two statements that are true according to this law. a the total amount of mass in a system remains constant regardless of the changes that take place in that system. b energy is neither created or destroyed, it only changes form. c in the energy pyramid, all the energy from each level is transferred to the next level. d in a closed system, i.e. a system that is isolated from its surroundings, the total energy of the system is conserved.

Explanation:

The law of conservation of energy states that energy is neither created nor destroyed in a closed - isolated system, only changing forms. Option A is about mass conservation, not energy. Option C is incorrect as not all energy is transferred in an energy pyramid. Option B and D correctly describe the law of conservation of energy.

Answer:

B. Energy is neither created or destroyed, it only changes form.
D. In a closed system, i.e. a system that is isolated from its surroundings, the total energy of the system is conserved.