Define The 3 principles of relative dating

To determine the Relative Age of Rocks geologists use the Principles of Superposition, Cross-Cutting Relationships, and Index fossils.
To determine the Absolute Age (exact age) of rock, geologists use Radiometric Dating.
How did geologist determine the Earth was 4.6 billion years old?

The scientific method is a series of steps followed by scientific investigators to answer specific questions about the natural world. it involves making observations, formulating a hypothesis, and conducting scientific experiments.the steps of the scientific method are •observation-the first step of the scientific method involves making an observation about something that interests you•question-once you've made your observation, you must formulate a question about what you have observed. •hypothesis-once you've made your observation, you must formulate a question about what you have observed. •experiment-once you've developed a hypothesis, you must design and conduct an experiment that will test it.•results-the results are where you report what happened in the experiment. •conclusion-the final step of the scientific method is developing a conclusion.i hope that this you : )