In 1650, an individual calculated that the earth was about 6,000 years old. since then, what has happened to scientists' estimates of the earth's age? question 9 options: scientists now are less sure about the earth's age scientists now think the earth is much younger scientists agree with the estimate from 1650 scientists now think the earth is much older

The answer is:

Scientists now think the earth is much older.

The explanation:

-The age of the Earth is 4.54 ± 0.05 billion years (4.54 × 109 years ± 1%) This age may represent the age of the Earth’s accretion, of core formation, or of the material from which the Earth formed.This dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.

-Following the development of radiometric age-dating in the early 20th century, measurements of lead in uranium-rich minerals showed that some were in excess of a billion years old.

answera compound;

answerdmitry mendeleyev made a workable classification of the elements