Time gap in between formation of earth & origin of life :

Options

A. `0.5` Billion years
B. 1Billion years
C. `4.5` Billion years
D. `4.0` Billion years

Answer

To determine the time gap between the formation of Earth and the origin of life, we can follow these steps:

1. **Identify the Formation of Earth**: The Earth is believed to have formed approximately 4 billion years ago.

2. **Identify the Origin of Life**: The earliest form of life, which is believed to be bacteria, is thought to have originated around 3.5 billion years ago.

3. **Calculate the Time Gap**: To find the time gap between the formation of Earth and the origin of life, we subtract the time of the origin of life from the time of the formation of Earth:
- Time of Formation of Earth = 4 billion years ago
- Time of Origin of Life = 3.5 billion years ago
- Time Gap = 4 billion years - 3.5 billion years = 0.5 billion years

4. **Conclusion**: The time gap between the formation of Earth and the origin of life is approximately 0.5 billion years.

Thus, the correct answer is **Option A: 0.5 billion years**.