What is needed to create fully charged ATP molecules in cellular respiration

19. scientists use meteorites that hit earth to provide evidence of the composition of earth's interior because they hypothesize that

Ihave no idea how to solve these. plus there's another question that is 2) a 10 kilogram meteorite is collected in space and brought back to earth. it is composed of 1.25 kg of uranium-238 and 8.75 kg of lead-206. how many u-238 half lives have passed? what is the approximate age of the meteorite?

How can we use spectral lines of light coming from the superclusters to identify which is receding from earth at the slowest rate.