NSES Content Standard B
Physical Science: Conservation of energy and the increase in disorder Grades 9-12, page 180 The total energy of the universe is constant. Energy can be transferred by collisions in chemical and nuclear reactions, by light waves and other radiations, and in many other ways. However, it can never be destroyed. As these transfers occur, the matter involved becomes steadily less ordered. See also the general discussion in Unifying Concepts and Processes:
Constancy, change, and measurement.
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