Science Quest

Select the correct description of the Earth’s inner core.

• Molten portion of the core and exhibits the characteristics of a mobile liquid

• It is made up of heavy elements with a mixture of molten rocks

• Its temperature is too low but it is under extreme pressure

• A metallic sphere or the solid portion of the core

What makes up the lithosphere?

• Oceanic crust and mantle

• Continental crust and oceanic crust

• Continental crust and mantle

• Crust and the upper mantle

Which of the following statements is TRUE?

• The crust is denser than the mantle.

• The oceanic crust is older than the continental crust.

• The oceanic crust is thicker than the continental crust.

• The continental crust is less dense than the oceanic crust.

Identify the major plate among the options.

• Caribbean Plate

• Scotia Plate

• Pacific Plate

• Nazca plate

How many tectonic plates are there covering the Earth's crust?

• 12

• 13

• 14

• 15

Lithospheric plates are plates on Earth that are constantly moving in different directions. Why are lithospheric plates moving?

• Because the Earth’s rotation moves them

• Because they are moved by the water in the oceans

• Because they are moved by the convection current in the mantle

• Because they are moved by the gravitational attraction of the Earth to other planets

This is considered as the fastest kind of seismic waves.

• Love waves

• Primary waves

• Body waves

• Secondary waves

How do seismic waves behave when they travel through molten rocks?

• Seismic waves speed up as they pass through the molten rocks

• Seismic waves slow down as they pass through the molten materials

• Both A and B

• Neither A nor B

Which type of surface wave creates the most damage to the structures on the surface?

• Rayleigh waves

• P-waves

• Love waves

• S-waves

The list below shows the summary of different steps in the triangulation method. Arrange them in the correct order.

• I, II, III, IV

• IV, III, II, I

• III, II, IV, I