Choose the correct statement(s) regarding discontinuities within the Earth:
The Gutenberg Discontinuity lies between the crust and mantle.
The Repetti Discontinuity divides the upper and lower mantle.
Consider the following statements about seismic waves:
They help in understanding the Earth's internal layering.
They are considered a direct source of information about the Earth’s interior.
Choose the correct statement(s) regarding the composition of Earth's internal layers:
The crust is rich in silica and aluminum (SIAL).
The mantle is composed predominantly of nickel and iron.
Consider the following statements about Earth's gravity:
Gravity is uniform throughout the planet.
Gravity is weaker at the equator than at the poles.
Choose the correct statements