Question

when molecules such as water and carbon dioxide undergo a chemical reaction, the atoms in the molecules are rearranged.
rearranging atoms both uses energy and releases energy. breaking down bonds always uses energy, and forming bonds always releases energy.
a chemical process often involves rearranging many atoms. the amount of energy used and released depends on the bonds that are broken and formed. some processes release more energy than they use. other processes use more energy than they release. overall, photosynthesis uses more energy than it releases. much of this energy is stored in the bonds of glucose, which plants can break down and rearrange to release chemical energy as needed to power growth and other important cell processes.
complete the paragraph.
during photosynthesis, ____ energy is used when bonds are broken in the reactants than is released when bonds are formed in the products. overall, energy is ____ during photosynthesis.
more... used less... released
less... used more... released

Explanation:

From the text, we know that "Overall, photosynthesis uses more energy than it releases". For the first blank, since energy used (breaking bonds) is more than energy released (forming bonds), we use "more". For the second blank, as photosynthesis uses more energy than it releases, overall energy is "used" (stored in glucose bonds, but the net is energy used as input is more than output released). So the correct option is "more... used".

Answer:

A. more... used