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Lecture 3 Water and Life - Water and Life Water How large...

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Water and Life Water and Life How large is the earth? Radius: 3986 mi (4000 mi) Diameter: 7973 mi (8000 mi) Circumference: 25,048 mi (25,000 mi) 400 billion billion gallons 326 million mi 3 Volume of Water: Zircon Crystals Earliest Evidence of liquid Water on Earth Earth’s oldest terrestrial materials Western Australia, 2001 ~ 4.3 bya
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Pillow Lavas 3.5 bya Basaltic Extrusive Rock Earth’s Mantle Asteroids Comets Sources of Earth’s Water Setting the stage for the evolution of life Water is an essential precursor to life.
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