What factor accounts for the slow return of carbon dioxide to the atmosphere?
a. geological uplift
b. burial of calcium carbonate shells and skeletons in ocean sediments
c. increase of solubility with depth
d. photosynthesis by surface organisms
e. sediment dissolution
b
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The infrastructure in most large American cities is currently in good shape, but will need major repairs or replacement in about 25 to 50 years
Indicate whether this statement is true or false.
Persistent pesticides are more toxic than nonpersistent pesticides and must be handled with greater care.
Answer the following statement true (T) or false (F)
____________________-____________________ ____________________ occurs when cold air is held against a mountain range
Fill in the blank(s) with correct word
Which of the following is an example of an intrusive, igneous rock formation?
A) volcano B) pluton C) dome D) lava flow