Dating rocks in geology is primarily used to:

• A. To forecast weather.
• B. To measure soil fertility.
• C. To determine the age of rocks and the timing of geological events.
• D. To evaluate current tectonics.

Answer: (C)

Dating rocks in geology is about determining how old a rock is and when different geological events occurred. This is essential for placing rocks in the geologic timescale, understanding the sequence of history-rich processes like crystallization, intrusion, metamorphism, and deposition, and correlating rocks from different regions. Techniques such as radiometric dating use known decay rates of isotopes to yield absolute ages, while other methods provide age constraints that help sketch the timeline of Earth’s past.

The other options don’t fit because forecasting weather relies on atmospheric data and models rather than the ages of rocks, soil fertility concerns the nutrient content and conditions of soils, not the timing of geological events, and evaluating current tectonics focuses on present-day plate movements rather than the ages of rocks or when past tectonic events occurred.