Chapters 1, 2 & 3 Links

Plate tectonics - the 'new' theory of the earth (born about 1967).  Read the history and mechanisms pages.

Rock cycle - no, Virginia, mountains are not 'everlasting' and rocks (even diamonds) are not 'forever'.

The Hydrologic cycle - water is a renewable resource that too many of us too often take for granted.

Biogeochemical cycles: Carbon, nitrogen, phosphorus

FEMA - the agency that used to work well.