Geochemical studies of rocks show that earth is approximately ________ years old.
A) 500 million
B) 6 thousand
C) 30 billion
D) 4.56 billion

Question

Quizplus · Accepted Answer

Geochemical studies of rocks, particularly analysis of radioactive isotopes, indicate that the earth is approximately 4.56 billion years old. Option A (500 million years) and Option C (30 billion years) are not supported by scientific evidence. Option B (6 thousand years) is based on a religious belief and not supported by scientific evidence.

Geochemical Studies of Rocks Show That Earth Is Approximately ________