Most of the carbon in the rocks that form Earth's mantle and crust was stored there when Earth formed. The rest of Earth's carbon is stored in various reservoirs and exchanged in many ways. In a model of the carbon cycle, which process does NOT contribute directly to the storage of carbon within sediment?
A. the deposition of organic carbon from decaying organisms
B. the deposition of dissolved carbon dioxide from the atmosphere
C. the formation of carbon dioxide through metabolism of carbohydrates
D. the formation of fossil fuels from terrestrial organisms under high heat and pressure

of those who start drinking before they're 15 will develop alcohol dependence

it would lead to upper respiratory infections and pneumonia.

the relative atomic mass of an element is the mass of one atom of that element, relative to 1/12th of the mass of a  1212c atom. to convert to an absolute mass in kg, it is necessary to multiply by  1.661×10−271.661×10−27.

the relative atomic mass is roughly equal to the number of neutrons, plus the number of protons, in the nucleus of the atom.

for elements with more than one stable isotope (different types of nucleus with different numbers of neutrons but the same number of protons), the quoted mass is usually the average mass, weighted by the relative abundance of the different isotopes.