The earth and other planets of the solar system were formed about ____ billion years ago.
A) 3.8
B) 4.6
C) 3.0
D) 2.9
E) 5.1

Question

Quizplus · Accepted Answer

The generally accepted age of the solar system is 4.6 billion years. This is based on various methods such as radiometric dating of meteorites, analysis of lunar rocks, and modeling of the evolution of the solar system. Option A (3.8 billion years) is closer to the age of the oldest rocks on Earth, but this refers to when the planet itself started to form not the solar system. Options C, D, and E are significantly lower than the estimated age of the solar system.

The Earth and Other Planets of the Solar System Were