. The scientific estimate for the age of Earth is 4.5 Billion years. The oldest rock sample found on the Earth is 4 Billion years old. How is it possible that Earth could be older than the oldest rock?

The Earth is indeed estimated to be about 4.5 billion years old, but the oldest rock samples we have are only around 4 billion years old due to geological processes. Rocks are constantly being formed, eroded, and recycled through plate tectonics, which means that older rocks can be destroyed or metamorphosed beyond recognition. The age of the Earth is determined using various dating methods on meteorites and lunar samples, which are believed to have formed around the same time as the Earth, providing evidence of its greater age.