Question

fill in the blanks to complete each statement about the age of earth. according to scientific evidence, earth is approximately 4.6 years old. scientists used dating to determine earth’s age.

Explanation:

The first blank is filled with "billion" as Earth's age is about 4.6 billion years. Radiometric dating, which measures the decay of radioactive isotopes in rocks, is used to determine Earth's age.

Answer:

billion; radiometric