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23 Cards in this Set
- Front
- Back
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2 largest water users in household
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Toilet
Clothes washer |
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% for domestic, industrial, Irrigation
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10%,20%,70%
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amount of water to make a 1/4 pounder
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11 tons
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daily and annual water usage
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daily: 350 gallons
Annual: 127,400 gallons |
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"the seeds of everything have a moist nature"
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Thales of Meletus
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Dimensions of the earth and its water
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R=4,000
D=8,000 C=25,000 400 billion billion tons/326 million mi cubed |
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Freshwater % & locations
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Available: groundwater,lakes,rivers,soils=.8%
not-available: Glaciers, icecaps, permafrost=1.8% |
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Age of earth and precambrian
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4.6 billion
Precambrian 90% of earth time |
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Evidence of water
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4.3 billion:zircon crystals
3.8 billion:greenland sedimentary rocks 3.5 billion:Pillow lavas |
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three potential sources for earths water
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earths Mantel
asteroids comets |
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Volcanic gas that is water vapor
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70%
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Largest asteroid and importance
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ceres: more freshwater than earth
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Difference in deuterium and importance
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Deuterium has a neutron
ratio is different in comets/asteroids than earth oceans |
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% of water in living systems
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Average:70%
plants:80% new born:77% Grown man:65% grown women:58% elderly:50% |
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longest survived without water
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12 days
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3 reasons water is an ideal medium for life
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retains heat, moderates temperature
Excellent solvent participates in chemical reactions |
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anaerobic vs autotrophic
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no oxygen
cant eat for energy |
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photo vs chemo autotrophs
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uses light
uses chemical reactions chemo appears 3.5 billion yrs as iron eating microbes in pillow lava |
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importance of cyanobacteria
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Removed poisonous Co2 from oceans and replaced it with oxygen
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first homo-sapiens
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200,000 - 150,000 yrs ago
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Lucy
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3.2 million years old
walked upright |
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Savannah hypothesis
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Himalayas change Africa's climate
trees become more sparse longer distance for food forced to spend more time on ground lead to bipedalism |
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Paleolithic vs neolithic
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Paleolithic: stone age, 2 million-12,000
first tools Neolithic:12,000-3,500, domestication and pottery systematic agriculture: 20,000-8,000 |
