ANATOMY

GENERAL ANATOMY

EMBRYOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
How old is the Earth?
A
6.4 billion years
B
46 billion years
C
64 billion years
D
4.6 billion years
Explanation: 

Detailed explanation-1: -Earth is estimated to be 4.54 billion years old, plus or minus about 50 million years. Scientists have scoured the Earth searching for the oldest rocks to radiometrically date. In northwestern Canada, they discovered rocks about 4.03 billion years old.

Detailed explanation-2: -The Earth was formed about 4.6 billion years ago, that’s 4, 600, 000, 000 years ago. It was formed by collisions of particles in a large cloud of material. Slowly gravity gathered together all these particles of dust and gas and formed larger clumps.

Detailed explanation-3: -Most scientists seem to agree that the earth is about 4.6 billion years old.

Detailed explanation-4: -By dating the rocks in Earth’s ever-changing crust, as well as the rocks in Earth’s neighbors, such as the moon and visiting meteorites, scientists have calculated that Earth is 4.54 billion years old, with an error range of 50 million years. Related: How big is Earth?

Detailed explanation-5: -They have examined rocks from the moon and from meteorites, neither of which have been altered by the rock cycle. The same techniques of radiometric dating have been used on those rocks. All the data from Earth and beyond has led to the estimated age of 4.5 billion years for our planet.

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