Earth_122_Ch10_notes_-_slides

Earth_122_Ch10_notes_-_slides - Introduction to...

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Introduction to Environmental Science: 10. Water Earth 122 Prof. Walter A. Illman
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ater Water If there is magic on this planet, it is in water. Loren Eisley
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bjectives Objectives nderstand the unique properties of water Understand the unique properties of water and how they affect the environment at erything from micro to global scales everything from micro to global scales. Summarize how the hydrologic cycle delivers esh water to terrestrial ecosystems and how fresh water to terrestrial ecosystems and how the cycle balances over time. Contrast the volume and residence time of water in the earth’s major compartments.
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utline Outline Why is Water Important? Water Resources Hydrologic Cycle Major Water Compartments Oceans Glaciers, Ice and Snow Groundwater Rivers and Streams Lakes and Ponds Wetlands The Atmosphere
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hy is Water Important? Why is Water Important? Water makes up 60 – 70% of the weight of most living organisms. Water is an excellent solvent (nutrients and ( waste); thus is essential in delivering to and from cells. Water is the only inorganic liquid that exists nder normal conditions at temperatures under normal conditions at temperatures suitable for life.
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hy is Water Important? Why is Water Important? Water molecules are cohesive, tending to stick together (capillarity). Important for seepage into soils/rocks as well as organisms. Water expands when it crystallizes. Ice floats keeping lakes and oceans from freezing up. pg g p Water has a high heat of vapourization using a reat deal of heat to convert from liquid to great deal of heat to convert from liquid to vapour. ater has high specific heat; moderates Water has high specific heat; moderates global temperatures
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(National Geographic Magazine)
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Water from the Colorado River is used for everything from farming to golf, like this Joe Cavaretta / AP yg g g , course in Las Vegas, Nev., where water use doubled from 1985 to 2000.
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This note was uploaded on 10/31/2011 for the course EARTH 122 taught by Professor Calia during the Spring '08 term at Waterloo.

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Earth_122_Ch10_notes_-_slides - Introduction to...

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