To determine the age of the ocean floor, scientists use a method called radiometric dating, which falls under the category of testing radioactive materials. Here's how this process works:
1. Rocks from the ocean floor contain certain radioactive elements that decay over time at a known rate.
2. By analyzing the ratio of parent isotopes to daughter isotopes in these rocks, scientists can calculate how much time has passed since the rocks solidified.
3. This technique provides a reliable way to estimate the age of the ocean floor and supports our understanding of the Earth's geological history.
So, the correct answer to the question "How did scientists determine how old the ocean floor is?" is B. Testing radioactive materials.
