What is the approximate length of the geologic time scale?A.50 billion yearsB.50 million yearsC.5 million yearsD.5 billion years

Break Down the Problem

1. Identify the correct option that represents the approximate length of the geologic time scale.

Relevant Concepts

2. The geologic time scale is a system of chronological dating that relates geological strata (layers of sedimentary rock) to time, revealing the history of Earth.

Analysis and Detail

3. The age of the Earth is generally accepted to be around 4.5 billion years, which allows us to assess the options.

Verify and Summarize

• A. 50 billion years - Incorrect, it vastly exceeds Earth's age.
• B. 50 million years - Incorrect, too short for the full scale.
• C. 5 million years - Incorrect, it’s also far too short.
• D. 5 billion years - Closest option, as it is less than the age of the Earth (4.5 billion).

Final Answer

D. 5 billion years