[ 87 ] Earth and Space Science GED ® TEST SCIENCE FLASH REVIEW • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • • Which choice explains how increasing atmospheric CO 2 necessarily alters atmospheric CO 2 ? A. Increasing atmospheric CO 2 levels can decrease ocean acidification, which in turn puts more CO 2 into the atmosphere. B. Increasing atmospheric CO 2 levels can decrease the ocean’s reservoir of carbonic acid, thereby decreasing atmospheric CO 2 . C. Increasing atmospheric CO 2 levels can change global temperature and impact ocean circulation, which impacts ocean CO 2 uptake. D. Increasing atmospheric CO 2 levels can directly increase ocean absorption of CO 2 , thereby increasing atmospheric CO 2 levels further. How do you find the context for the word equilibrate in the sentence “It is not unusual for there to be differences in the carbon dioxide (CO 2 ) levels between air and ocean because it takes about a year for surface ocean CO 2 to equilibrate with the atmospheric CO 2 ”? How do you find the context for the phrase ocean acidification in the sentence “Ocean acidification is a result of increasing atmospheric carbon dioxide levels interacting with the surface oceans”?