Question

Into how many major eras is Earth's history divided?

Options

• Three major eras

• Five major eras

• Ten major eras

• Seven major eras

Answer 1

Earth's history is divided into five major eras: Archaeozoic, Proterozoic, Palaeozoic, Mesozoic, and Cenozoic. Each era is further subdivided into periods and epochs marked by significant changes in climate, plant life, and animal life.