Isotope ratios refer to the relative abundance of different forms, or isotopes, of a particular element in a sample. Isotopic ratios are commonly used in various fields of scientific research, including geology, archaeology, biology, and environmental science, to study processes such as geological formation, biological processes, and pollution sources. Isotope ratios can provide valuable information about the origin, history, and interactions of different materials and organisms. For example, stable isotope ratios can be used to track the movement of elements through the environment, while radioactive isotopes can be used to date rocks and other materials. Overall, isotope ratios play a crucial role in advancing our understanding of the natural world and the complex processes that shape it.