NSES Content Standard B  Physical Science: Transfer of energy Grades 5-8, page 155 Energy is a property of many substances and is associated with heat, light, electricity, mechanical motion, sound, nuclei, and the nature of a chemical. Energy is transferred in many ways.

 
Benchmark 4E The Physical Setting: Energy Transformations
Grades 3-5, page 84
When warmer things are put with cooler ones, the warm ones lose heat and the cool ones gain it until they are all at the same temperature. A warmer object can warm a cooler one by contact or at a distance.

Benchmark 4E The Physical Setting: Energy Transformations
Grades 6-8, page 85
Energy cannot be created or destroyed, but only changed from one form into another.

Benchmark 4E The Physical Setting: Energy Transformations
Grades 6-8, page 85
Energy appears in different forms. Heat energy is in the disorderly motion of molecules; chemical energy is in the arrangement of atoms; mechanical energy is in moving bodies or in elastically distorted shapes; gravitational energy is in the separation of mutually attracting masses.