Question

why is radioactive dating important when approximating the age of earth? scientists can identify different life forms using index fossil records. scientists can examine how temperature changes within earths interior. scientists can determine the order of when rocks formed on earth. scientists can analyze changes in chemical concentration of atmospheric gases.

Explanation:

Radioactive dating is used to determine the age of rocks by measuring the decay of radioactive isotopes. This helps in establishing the order of rock - formation, which is crucial for approximating Earth's age. The other options are about different geological or paleontological studies not directly related to radioactive dating for Earth - age approximation.

Answer:

Scientists can determine the order of when rocks formed on Earth.