Contents of 1.6 Work: Explained

Movement of mass within and on Earth's surface is evidence of work.
Work requires energy.
On Earth, sunlight and internal heat from radioactive decay are the most prevalent sources of energy.
Heat is transferred by radiation, conduction, and convection—the last of which is most important in Earth processes.
Potential energy is a form of stored energy based on physical position with respect to gravity. When mass falls, flows, or goes downhill, this energy is realized.

1.6 How does work apply to Earth?