Question

question 3 of 10
what is an epoch?
○ it is a time of human existence.
○ it is a unit of geologic time.
○ it is the existence of organisms in the environment.
○ it is the period of time scale.

Explanation:

To determine the correct answer, we analyze each option:

• Option 1: "It is a time of human existence" is incorrect as an epoch in geology is not limited to human existence.
• Option 2: "It is a unit of geologic time" is correct. In geology, an epoch is a subdivision of a period, which is a unit of geologic time.
• Option 3: "It is the existence of organisms in the environment" is incorrect as it describes ecology or biology concepts, not the definition of an epoch.
• Option 4: "It is the period of time scale" is too vague and does not accurately define an epoch.

Answer:

B. It is a unit of geologic time.