Final answer:
Name-changes in the Geologic Time chart indicate significant changes in Earth's geology, climate, and the evolution of life.
Step-by-step explanation:
In the Geologic Time chart, every name-change indicates a significant change in Earth's geology, climate, and the evolution of life. Each division in the chart, such as eons, eras, and periods, represents a distinct period of time characterized by major geological and biological events. For example, the Paleozoic era is known for the emergence of complex life forms and the colonization of land by plants and animals, while the Mesozoic era is famous for the age of dinosaurs. These name-changes help scientists to organize and understand Earth's history and the evolution of life.