How old is the oldest known mineral, a zircon crystal, on Earth?
A)13.7 billion years old
B)4.6 billion years old
C)4.4 billion years old
D)2.657 billion years old

Question

Quizplus · Accepted Answer

The oldest known mineral on Earth is a zircon crystal found in Western Australia and it is dated to be around 4.4 billion years old. This crystal provides information about the early Earth's evolution and the conditions that existed at that time. Option A is incorrect because it refers to the age of the universe while the question is asking about the age of a mineral on Earth. Option B is the generally accepted age of the Earth, but it is not the age of the zircon crystal. Option D is a randomly selected number and is not related to the age of the oldest known mineral on Earth.

How Old Is the Oldest Known Mineral, a Zircon Crystal