Scientists estimate the age of the earth to be at least 4.4 billion years old. How would they know that?
Select one:
a. Radiometric dating of rocks led us to the oldest rock formation on the planet.
b. 4.4 billion years is just a number passed down but nobody really knows where it came
from
C. Scientists estimated that if the sun is 4.6 billion years old, the earth must be just a bit
younger
d. Scientists can count Earth layers like rings on trees and estimate how old the planet is