About how long ago was the earth formed?

4.6 billion years ago

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10 billion years ago

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3.0 billion years ago

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20 billion years ago

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Solution

The correct option is A 4.6 billion years ago
Astrophysicists and geologists estimate that Earth is about 4.6 billion years old.

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Match the events leading to the origin of life listed under column I with the time frame given under column II; choose the right answer which gives the correct combination of the alphabets of the two columns:

$\begin{matrix} C o l u m n I & C o l u m n I I E v e n t s & T i m e F r a m e A & O r i g i n o f u n i v e r s e & p & 3 b i l l i o n y e a r s a g o B & O r i g i n o f e a r t h & q & 4.6 b i l l i o n y e a r s a g o C & O r i g i n o f s t a r s & r & 10 b i l l i o n y e a r s a g o D & O r i g i n o f l i f e & s & 14 b i l l i o n y e a r s a g o t & 5 b i l l i o n y e a r s a g o \end{matrix}$

Q. Which one is present today but was absent about 3 to 5 billion years ago?

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About how long ago was the earth formed?

The correct option is A 4.6 billion years agoAstrophysicists and geologists estimate that Earth is about 4.6 billion years old.

The correct option is A 4.6 billion years ago
Astrophysicists and geologists estimate that Earth is about 4.6 billion years old.