He principal characteristic that determines whether an aquatic ecosystem is classified as marine or freshwater is a. surface area b. water depth c. temperature d. salinity

How do the nuclei of covalently bonded atoms keep the bond together

Why are small quantities of chlorofluorocarbons so harmful to the ozone layer? a. the chlorofluorocarbons act like ultraviolet radiation causing large amount of ozone to be produced. b. the chlorine from the chlorofluorocarbons reacts with free molecules of oxygen causing a stop in ozone production c. free oxygen atoms can replace the chlorine in chlorine monoxide, releasing a free atom of chlorine which can then recombine with an oxygen atom in ozone, destroying more ozone. d. chlorofluorocarbons absorb ultraviolet radiation, preventing the formation of ozone select the best answer from the choices provided

(! ) what’s fracking and what does it have to do with carbon, carbon dioxide, or fossil fuels?