How do you think the geological time scale could be improved, or do think there could be some information that may be missing that could significantly redefine the geologic time scale?

What is the following best defines climate?

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?

What organs comprise the respiratory system of a bird