NSES Content Standard B
Physical Science: Conservation of energy and the increase in disorder Grades 9-12, page 180 Heat consists of random motion and the vibrations of atoms, molecules,
and ions. The higher the temperature, the greater the atomic or molecular
motion.
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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.
Benchmark 4E The Physical Setting: Energy
Transformations
Grades 9-12, page 86
Heat energy in a material consists of the disordered motions of its
atoms or molecules. In any interactions of atoms or molecules, the statistical
odds are that they will end up with less order than they began--that is,
with the heat energy spread out more evenly. With huge numbers of atoms
and molecules, the greater disorder is almost certain.