What rock group can radioactive dating be used with

The latest high-tech equipment permits reliable results to be obtained even with microscopic samples.

Radiometric dating is self-checking, because the data (after certain preliminary calculations are made) are fitted to a straight line (an "isochron") by means of standard linear regression methods of statistics.

In regions outside the tropics, trees grow more quickly during the warm summer months than during the cooler winter.

This pattern of growth results in alternating bands of light-colored, low density "early wood" and dark, high density "late wood".

2) To familiarize students with the concept of half-life in radioactive decay.

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