Question

12. Scientist measure geologic time in many forms. One way to represent this time is to calculate it into eras. Suppose you were going to build a model representing the four major time spans in Earth's history. Number the eras from 1 to 4 with the most recent as 1 and the oldest as 4. Mesozoic era, Cenozoic era, Precambrian time, Paleozoic era​

Answer 1

In the geological time scale, the eras from most recent to oldest are the Cenozoic era, Mesozoic era, Palaeozoic era, and Precambrian time.

Step-by-step explanation:

The geological time scale divides Earth's history into manageable segments such as eons, eras, periods, epochs, and ages. This system allows scientists to organize Earth's past based on significant geological, climatic, and biological events. To answer the student's question about ranking the eras from most recent to oldest, we would list them as follows:

1. Cenozoic era (1 - Most recent)
2. Mesozoic era (2)
3. Palaeozoic era (3)
4. Precambrian time (4 - Oldest)

The Precambrian time represents a vast majority of Earth's history and includes the Hadean, Archean, and Proterozoic eons. It is followed by the Palaeozoic era, succeeded by the Mesozoic era, and finally the Cenozoic era, which is the current era we are in.