keeling curve correct answers graph of CO2 concentration vs time
human population growth, sustainability, linked earth systems correct answers three linked concepts to be discussed through the course
water was diverted from the lake for farming correct answers what led to changes in the area ...
Environmental Geoscience--exam 1 || A+ Guaranteed.
keeling curve correct answers graph of CO2 concentration vs time
human population growth, sustainability, linked earth systems correct answers three linked
concepts to be discussed through the course
water was diverted from the lake for farming correct answers what led to changes in the area of
the Aral Sea?
reduced soil quality, less agricultural production, increased movement to urban areas, increased
risk of landslides correct answers deforestation in Haiti has led to:
archbishop james usher, annals of the old testament correct answers made a careful study of the
Bible and other historical sources and concluded in __________ that the Earth had been created
at midday October 23, 4004 BC (1650)
edmund halley correct answers suggested division of the total amount of salt in the world's seas
by the amt added each year to determine Earth's age (1715)
georges-luis leclerc correct answers guessed the earth's age to be 75,000-168,000 years old after
conducting an experiment consisting of heating spheres (1770)
clair patterson correct answers used a technique of counting uranium/lead ratios in old rocks
(1948)
meteorites correct answers considered pristine materials from the early days of the solar system,
and thus were used to determine the age of the Earth
u-238 to pb-206, u-235-pb207 correct answers two separate decay chains used to measure
uranium/lead ratios
4,550 million years correct answers patterson's measurements placed the age of the Earth at:
canyon diablo meteorite correct answers fragments of this meteorite were used in paterson's
dating
barringer crater correct answers the canyon diablo meteorite was recovered from:
4.53 to 4.58 billion years correct answers spread of the age of many meteorite samples
accretion of planets from original solar dust and meteorites correct answers a 50 million year
spread between the ages of different meteorites accounts for
4.4 and 4.5 billion years correct answers maximum ages of rocks returned from the moon
, 99.9 correct answers ___% of the mass of the solar system went to make the sun
200 million correct answers the Earth was essentially formed in just ____________ years
hadean eon correct answers a period of intense meteor bombardment--simple life began towards
its end
3.85 bya correct answers thought to be when life first appeared
stanley miller and harold urey correct answers conducted an experiment that showed organic
molecules could form in an atmosphere of water, methane, ammonia, hydrogen, and lightning
(1953)
rna world, lipid world, iron-sulfur world, clay theory correct answers 4 theories explaining
organic molecules evolution into more complex structures
archean eon correct answers oceans had formed by the start of the ________
cyanobacteria correct answers At some point in the first billion years of life ________ began the
process of photosynthesis
stromatolites correct answers formed by bonding of cyanobacteria, dust, and other particles
proterozoic eon correct answers witnessed the great oxygenation event, and 'snowball Earth,' and
the origin of eukaryotes
2 billion correct answers It took ______ years to reach modern oxygen concentrations in the
atmosphere
UV radiation correct answers reacts with oxygen to for ozone
paleozoic, mesozoic, cenozoic correct answers 3 eras of the phanerozoic eon
paleozoic era correct answers 'Cambrian explosion,' life colonized land, sudden new species and
mass extinctions, formation of super-continent pangaea
mesozoic era correct answers began with permian-triassic extinction event, ends with cretaceous-
palogene extinction event
cenozoic era correct answers the current era, which began 66 million years ago
cretaceous-palogene correct answers Mammals and birds that survived the _____________
extinction event diversified into their modern forms
neptunists correct answers thought all of Earth's features could be explained by the rising and
falling of the seas
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