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PHSC Exam 3

Physical Science Exam 3

QuestionAnswer
Sources of oxygen on earth today Burial of carbon from organisms, photochemistry
T or F: Oxygen is prevalent in the Earth's atmosphere today because of photosynthesizing life. True
Which is NOT an evidence for low oxygen abundance early in Earth's history? Charcoal (Forest Burning)
T or F: Banded iron formations (BIFs) were produced because the ocean water had so little oxygen that iron can remain in solution. True
What mainly shields us against ultraviolet radiation in our atmosphere today? Ozone
T or F: Scientist does NOT believe that eukaryotes came from symbiotic relationships between bacteria. False
T or F: Punctuated equilibrium states that an isolated population of a given species may change rapidly as they breed among their limited group. True
Which is NOT a cause for the Vendian-Cambrian Revolution of flowering of life? (Increased oxygen levels, absence of predators, genetic complexity, INCREASED GLACIERS).
Cretaceous-Tertiary extinction is believed to be cause by Impact crater at Chicxulub
What breaks up supercontinents? Mantle Heat
T or F: LOW-latitude continents are better accumulators of snow and ice than a supercontinent near the Equator. False
T or F: Geological signatures of glacial action are the main evidences for ice ages on Earth. True
Which did NOT maintain the ice ages on Earth? INCREASE OF ATMOSPHERIC CARBON DIOXIDE
Which is NOT evidence for a Warm Cretaceous Period? Faint Sun
What causes opposite season on the northern and southern hemisphere of the Earth? Earth's Tilt
According to scientist, hominid species originated in Africa
Which continent were Homo Erectus not found? America
Last physical evidence for Neanderthals were found in Europe
T or F: Interglacial period is warm periods between glacial periods. True
Which is NOT an element used in ice core for temperature record? Iron
Where are plant pollen preserved for climate indicator? Dried Lake beds
What is used in dating trees? Carbon - 14
What cold period had low sunspot activity called “Maunder Minimum”? Little Ice Age (aka "H")
T or F: Younger Dryas shows the importance of understanding ocean-atmospheric connection in the climate? True
T or F: In the twentieth century, man has increased atmospheric carbon dioxide by burning fossil fuels and burning forest for clearing. True
Which is NOT a limitation of General Circulation Models? Predicate Climate Change
Which is NOT a predicted effect of GCMs for doubling are CO2 levels in our atmosphere? Snowball earth
Which does NOT drive ocean circulation? Iron Core
Ozone layer is destroyed by ...not methane or carbon dioxide
T or F: Overpopulation is the root cause of depletion of resources. True
T or F: Food production is outpacing the worldwide population growth. False
T or F: Fossil fuels originate from past plants and animals. True
Which is NOT an alternative energy sources from fossil fuels? Crude Oil
Which is NOT an air pollutant? H2O
Created by: acluke
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