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
Choose the correct statement(s) regarding the lithosphere and asthenosphere:
The lithosphere includes both the crust and the entire mantle.
The asthenosphere plays a role in plate tectonic movement.
Identify the correct statements:
The core-mantle boundary lies at around 2900 km depth.
Pressure decreases with increasing depth.
The inner core has a density of about 13 g/cm³.
Which of the following statements are true about the Earth’s crust?
Its thickness is uniform throughout.
It is thickest under mountain ranges.
The average density of oceanic crust is greater than continental crust.