GGR112H5 Chapter Notes - Chapter 9: Field Capacity, Savings Account, Osmosis
Document Summary
Water molecules come from within earth over a period of billions of years in the outgassing process. Thus began endless cycling of water through the hydrologic earth. Approximately 97% of it is salty seawater, and the reaming 3% is freshwater- most of it frozen. The present volume of water on earth is estimated at 1. 36 billion km3, an amount achieved roughly 2 billion years ago. This over-all steady state equilibrium might history, but it is not. Eustasy refers to worldwide changes in sea level and relates to changes in volume of water in the oceans. The amount of water stored in glaciers and ice sheets explains these changes as glacio-eustatic factors. At present, sea level is rising because of increases in the temperature of the oceans and the record melting of glacial ice. system of evaporation condensation precipitation. Water covers about 71% of seem in conflict with the many changes in sea level that have occurred over earth"s.
