Question

1 how does studying earthquake waves help scientists understand earths interior?

Explanation:

Earthquake waves (P-waves and S-waves) behave differently when passing through materials of varying density, state (solid/liquid), and composition. P-waves travel through solids and liquids, while S-waves cannot pass through liquid. By measuring the speed, refraction, and shadow zones of these waves as they travel through Earth, scientists can map the boundaries and properties of Earth's internal layers (crust, mantle, outer core, inner core).

Answer:

Studying earthquake waves helps scientists understand Earth's interior because:

1. P-waves compress through solids/liquids, S-waves only travel through solids; the absence of S-waves in certain shadow zones revealed the liquid outer core.
2. Variations in wave speed show changes in the density, composition, and state of materials in Earth's layers, allowing scientists to map the structure and properties of the crust, mantle, and inner core.