The accumulation of an early atmosphere by the release of gases from Earth’s interior because of
heating and volcanism:a.
continental accretion d. photosynthesis
b. abiogenesis e. outgassing
c. stromatolite
E
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Which environmental problem has caused many lakes to be too acidic to support most species of fish?
A. acid rain B. acid reflux C. ozone pollution D. uranium tailings
China's plan for decreasing the rate of natural increase included implementation of a one-family/two-child policy
Indicate whether the statement is true or false.
The soil shown in the photograph below has a reddish tint, which may mean that
A. it has been waterlogged at some point. B. it has abundant aluminum and/or iron oxides. C. there are salts or other minerals that have been deposited by the evaporation of water. D. it contains abundant organic matter.
What is the source of the energy that powers the Earth system?
A) the Sun B) heat from Earth's interior C) both A and B D) none of the above