Question

Which best describes the geologic time scale?

A. It explains why events happen throughout Earth’s history.
B. It presents the correct sequence of events in Earth’s history.
C. It is used to determine the absolute dates in years for different periods.
D. It was created by scientists who studied index fossils and climate change.

Answer 1

Option (B)

Step-by-step explanation:

A geological time scale is the sequence of events that have taken place in the past since the formation of the earth. These events have formed due to the various geological process that has undergone in the past and are grouped in different zones. These show how the landscape formed and when the organisms started to appear and how the evolutionary process has taken place.

These events are grouped into three eons namely,

1) Hadean

2) Archaean

3) Proterozoic

4) Phanerozoic- It is again divided into three parts. They are-

(a) Paleozoic

(b) Mesozoic

(c) Cenozoic

These geological time scales play an important role in understanding the existence of different phases on earth and also it helps in identifying which age a rock belongs. It is very frequently used by geologists to determine the past activities.

Thus, the correct answer is Option (B).

Answer 2

The correct answer is option B, that is, it presents the correct sequence of events in Earth’s history.

The geological time scale signifies towards a framework of chronological dating that relates geological strata with time. It is used by geologists, paleontologists, and other scientists of the Earth to illustrate the relations and timings of incidents that have taken place during Earth's history.