Think about how the geologic time scale was created and how it is divided. Then answer the following questions. HELP ILL GIVE BRAINLEIST!!

How did scientists form the geologic time scale?
How is this scale organized?
What processes changed the Earth's environment during Precambrian time?

Plz which of the following provisions of the compromise of 1850 was designed to appeal to slave states? a. congress passed a strict fugitive slave law. b. the slave trade was banned in washington dc. c. texas agreed to give away some of its land so that the territory would be available for future states. d. california was admitted to the union as a free state.