GENERAL KNOWLEDGE

GK

SOLAR SYSTEM

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What evidence supports the hypothesis that Earth is 4.6 billion years?
A
the age of rocks from the Moon
B
the age of zircon grains in granitic crustal rocks
C
the age of meteorites
D
all of the above answers are correct
Explanation: 

Detailed explanation-1: -At present, perhaps the oldest acknowledged evidence of life on the planet is found in 3.48-billion-year-old rocks in Western Australia. This material is said to show remnants of stromatolites-mounds of sediment formed of mineral grains glued together by ancient bacteria.

Detailed explanation-2: -The earliest life forms we know of were microscopic organisms (microbes) that left signals of their presence in rocks about 3.7 billion years old. The signals consisted of a type of carbon molecule that is produced by living things.

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