After about how many years of formation of earth,life appeared on this planet?

Options

A. 500 billion years
B. 50 million years
C. 500 million years
D. 50 billion years

Answer

**Step-by-Step Solution:**

1. **Understanding Earth's Formation**: The Earth was formed approximately 4.6 billion years ago. Initially, it was a hot mass filled with gases and lacked a stable atmosphere.

2. **Absence of Atmosphere**: For life to exist, certain conditions must be met, including the presence of an atmosphere. In the early years of Earth's formation, there was no atmosphere, which made it impossible for life to thrive.

3. **Formation of Atmosphere**: Over time, the Earth cooled down, and various gases began to accumulate, forming an atmosphere. This process took a significant amount of time after the initial formation of the Earth.

4. **Emergence of Life**: It is estimated that life began to appear on Earth about 500 million years after its formation. This means that life started to emerge around 4.1 billion years ago.

5. **Conclusion**: Therefore, after about 500 million years of the formation of Earth, life appeared on this planet.

**Final Answer**: Life appeared on Earth approximately 500 million years after its formation.

---