Final answer:
Seismic waves can be used to determine the composition of Earth's layers.
Step-by-step explanation:
Earthquake waves, also known as seismic waves, move at different speeds in different materials. By analyzing the speed and behavior of seismic waves as they pass through the Earth, scientists are able to determine the composition of Earth's layers. This helps in understanding the structure and composition of the Earth's interior, including the core, mantle, and crust.
Learn more about Seismic Waves