Oxygen (O2) is being added to the atmosphere by
A - solar radiation
B - meteorites
C - vegetation
D - animal decomposition
E - the burning of coal
C - vegetation
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Explain why the inner region of our solar system lost its lightweight gas molecules during planetary accretion
What will be an ideal response?
What is the most important agent of chemical weathering?
A) Salt B) Heat C) Wind D) Water
Which of the following is TRUE regarding world population?
A) The most significant factor in explaining population growth of a country is when it was colonized. B) Life expectancies are higher for women than men, in both the developed and developing worlds. C) Planck's theories of migration have been elevated into laws of migration. D) Rates of natural increase are highest in cities. E) Total fertility rates explain flows of international migrants.
Which statement is true about continental crust?
A. It is composed of granitic-type rock and has the same density as oceanic crust. B. It is composed of basaltic-type rock and has a lower density than oceanic crust. C. It is composed of basaltic-type rock and has a higher density than oceanic crust. D. It is composed of granitic-type rock and has a lower density than oceanic crust. E. It is composed of granitic-type rock and has a higher density than oceanic crust.