Define the endogenic and the exogenic systems. Describe the driving forces that energize these systems. Explain the principle of uniformitarianism and discuss the time spans into which Earth’s...

Define the endogenic and the exogenic systems. Describe the driving forces that energize these systems. Explain the principle of uniformitarianism and discuss the time spans into which Earth’s geologic history is divided.

How is the geologic time scale organized? What era, period, and epoch are we living in today? What is the difference between the relative and numerical ages of rocks?