Answer:
A) They are named for the places where geologists first described rocks or fossils from that time
Explanation:
The relationship between plant and animals, layers and types of rocks, fossils and radioactive dating are used for preparing Geologic Time Scale. Geologic time is comprise of four Eons namely Hadean (the initial stage) followed by Archean and Proterozoic and Phanerozoic in the recent . The Eons are classified into eras and theses eras reflect the changes in fossil record. Eras are further divided into periods and some periods into Epochs.
In periods a single rock system is found while the division in the era's reflect major changes in fossil record.
The Aryan Empire lasted 100 years and the Mauryan Empire lasted 300
Answer:
Following the Civil War, plantation owners were unable to farm their land. They did not have slaves or money to pay a free labor force, so sharecropping developed as a system that could benefit plantation owners and former slaves.
Explanation:
After the Civil War, former slaves sought jobs, and planters sought laborers. The absence of cash or an independent credit system led to the creation of sharecropping. ... The Great Depression, mechanization, and other factors lead sharecropping to fade away in the 1940s.
