Approximately how old is the Earth

Answer:4.5 billion years

Explanation:

According to radiometric

The earth is approximately 4.54 ± 0.05 billion years old.

Explanation:

In solar system the earth is only planet to have life in it. The existence of water makes it unique and it is the root cause for the presence of life. Other planet do not have any atmosphere water available on them which could support life in any form.

The presence of atmosphere hydrosphere and lithosphere induces biosphere which is also defined as sphere of life. Life exist on earth in the form of plants animals and small organisms.

The first life was originated in water itself. Water gives all the essential conditions which would support life.