Final answer:
The inside structure of the Earth can be known through drilling holes and studying earthquakes.
Step-by-step explanation:
The inside structure of the Earth is known through various scientific methods. Two of these methods are drilling holes and studying earthquakes. By drilling holes, scientists can directly access and analyze rock and soil samples from different depths, providing insights into the composition and structure of the Earth's layers. Earthquakes provide valuable information through seismic waves that travel through the Earth's interior and can be detected and analyzed to study its properties.
Learn more about Inside structure of the Earth