Which statement about energy is correct?
A) A little energy is lost every time an energy transformation occurs.

B) Because of the conservation of energy, it is possible to have a machine that would never need energy.

C) Conservation of energy occurs only when some of the energy is converted to light.

D) Energy can change form, but energy can never change in total amount.



The following equation illustrates the chemical reaction that occurs in a plant.
Water + carbon dioxide + light energy → sugar + oxygen.



Based on the law of conservation of energy, what happened to the light energy in the reaction?



A) It was produced by the plant.

B) It was destroyed

C) It was changed into oxygen gas

D) It was converted into chemical energy stored in the sugar.