How are chunks of time in the geologic timeline organized ?
a.) each chunk of time represents the same numbers of years.
b.) each chunk of time represents a time when fossil indicate that earth's life forms were similar.
c.) the chunk of time are organized by the year when major fossils were discovered.
d.) the chunk are organized by the number of years since the extinction of the dinosaurs.

How do cfcs cause ozone depletion? how do cfcs cause ozone depletion? ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation breaks down cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks two oxygen atoms away from ozone, leaving behind a paired oxygen molecule. ultraviolet radiation creates cfcs, molecules containing chlorine. chlorine then breaks one oxygen atom away from ozone, leaving behind a paired oxygen molecule.