How old is the earth?

Answer 1

It's based on several things:

1) dating meteorites. When we find a meteorite from this solar system that has a similar composition to earth, you get many young ages, but the oldest and most common date to 4.6 Ga (billion years).

2) isotope trends. When you look at certain radiogenic isotope ratios that change with time, like Rb/Sr or U/Pb, you find that many rocks with differnt ratios of many ages form a line, and the line traces back to an origin of 4.6 Ga as well.

The oldest life is 3 1/2 Ga, the oldest rock is about 4 Ga, and the oldest date ever found is on the highly durable mineral Zircon from Australia, it's date is 4.2 Ga. So, there is no direct method, it is based on inferences. However, many different inferences lead to the same number 4.559 Ga (to be specific).

You would have to throw out everything we know and love about Geology to accept a young earth view. When you look at the Grand Canyon, how can you say that only took 6000 years to form?

Answer 2

The Earth is approximately 5 thousand million years old or 5 Billion Years. The oldest rocks dated so far have been a little younger at 4.5 Billion years old.

Answer 3

The earth is about 4.5 Billion years old it was formed soon after the sun was formed . When a disk of dust and gas was orbiting the star after it had just began it's nuclear fusion.

Answer 4

The Earth is about 4.55 Billion years old.

Answer 5

Scientific evidence indicates that the Earth was formed around 4.57 billion years ago[1] and its natural satellite, the Moon, was orbiting it shortly thereafter, around 4.53 billion years ago.

You could get more information from the link below...

Answer 6

Between 4.5- to 5-billion years old

Answer 7

4.5 billion years the oldest rock on the earth was about 4.2 billion years old.

Answer 8

It is the same age as the other planets. 4.6 Billion years old. But speaking of comparing with other planets in other galaxies. Its just a "baby planet", which means its still not as old as other planets.

Answer 9

Most methods of estimating the age of the earth indicate a maximum age of thousands not billions.
For example:
The amount of salt (and many other minerals) in the sea. We can estimate the salt going in and out and extrapolate backwards.
Other young age methods include:
not enough mud on the sea floor
Helium in rocks.
The existence of comets.
Decay of earths magnetic field.
Short age of human history.
Polonium haloes.
And many others

Answer 10

3 to 7 billions years old-take you pick