Nuclear fusion is the process by which
A) electrons are rearranged inside an atom, releasing energy
B) a number of smaller nuclei combine to form a larger nucleus with the release of energy
C) an electron is ejected from the nucleus of an atom, releasing energy
D) large nuclei break up into smaller nuclei with the release of energy
Question 2
Most of the Earth's carbon dioxide
A) has dissolved in the oceans and is locked up in sedimentary carbonate rocks like limestone
B) is present in the atmosphere
C) has escaped into space
D) has been destroyed in the atmosphere by solar radiation