Earth’s Structure
Geography ⇒ Physical Geography
Earth’s Structure starts at 6 and continues till grade 12.
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See sample questions for grade 12
Describe the composition of the Earth's core.
Describe the process of differentiation in the context of Earth's formation.
Explain how seismic waves help in understanding the structure of the Earth.
Explain the difference between the continental crust and the oceanic crust.
Explain the role of radioactive decay in the Earth's internal heat.
Explain the significance of the Mohorovičić discontinuity (Moho).
Explain why seismic shadow zones exist for S-waves.
Explain why the inner core remains solid despite high temperatures.
What is the approximate thickness of the Earth's mantle? (1) 5-10 km (2) 30-50 km (3) 2900 km (4) 6371 km
What is the average density of the Earth? (1) 2.7 g/cm³ (2) 5.5 g/cm³ (3) 10.5 g/cm³ (4) 1.0 g/cm³
Which layer of the Earth is the thinnest? (1) Crust (2) Mantle (3) Outer core (4) Inner core
Which of the following best describes the asthenosphere? (1) Rigid and brittle (2) Partially molten and plastic (3) Completely liquid (4) Composed of iron and nickel
The average thickness of the continental crust is about ______ km.
The boundary between the crust and the mantle is called the ______.
The boundary between the upper and lower mantle is marked by a change in ______.
The D'' (D double prime) layer is located at the base of the ______.
True or False: The asthenosphere is a rigid layer of the Earth.
True or False: The Earth's crust is uniform in thickness everywhere.
True or False: The Earth's magnetic field is generated by movements in the inner core.
True or False: The inner core of the Earth is in a liquid state.
