Multiple choice general knowledge science & technology How old is the earth? 500,000 years 5,000,000 years 5,000,000,0 years 5,000,000,000 years Reveal answer Fill a bubble to check yourself D Correct answer Explanation Scientific consensus, based on radiometric dating of meteorite samples and the oldest known Earth rocks, places the age of the Earth at approximately 4.54 billion years, which rounds to 5,000,000,000 in this context.