The age of the earth
The age of the earth
Age of earth
Earth
Earth is the third planet from the Sun and the only
astronomical object known to harbor life. According to
radiometric dating and other sources of evidence, Earth formed
over 4.5 billion years ago. Earth's gravity interacts with other
objects in space, especially the Sun and the Moon, Earth's only
natural satellite. Wikipedia
Population: 753.04 crores (2017) Trending, World Bank
View on Maps: google.com/maps/space/earth
Mass: 5.972 × 10^24 kg
Radius: 6,371 km
Surface area: 510.1 million km²
Did you know: It will become much bigger than it is now and
will make Earth very hot. scholastic.com
Feb 27, 2014 - Since the planet Earth doesn't have a birth certificate
to record its formation, scientists have spent hundreds of years struggling
to determine the ...
Age of the Earth. The age of the Earth is 4.54
± 0.05 billion years (4.54 × 109 years ± 1%).
Following the development of radiometric agedating in the early 20th century, measurements of
lead in uranium-rich minerals showed that some
were in excess of a billion years old.
 1. How long will the earth last?
 Ans ; If Earth is not destroyed by the expanding red giant Sun in 7.6 billion years,
then on a time scale of 1019 (10 quintillion) years the remaining planets in the Solar
System will be ejected from the system by violent relaxation.
 2. How old did Darwin think the earth was?
 Ans; In the first edition of On the origin of species (1859), Darwin had estimated
that the erosion of the Sussex Weald must have taken 300 million years. Both he
and Lyell were surprised when the physicist William Thomson (Lord Kelvin) said the
Earth could not be as old as they thought.
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