Earth’s Structure
Geography ⇒ Physical Geography
Earth’s Structure starts at 6 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Earth’s Structure.
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See sample questions for grade 11
Describe how seismic shadow zones provide evidence for the structure of the Earth's core.
Describe the process by which scientists study the internal structure of the Earth.
Describe the role of radioactive decay in the Earth's internal heat.
Explain how the study of meteorites helps in understanding the Earth's interior.
Explain the difference between the lithosphere and the asthenosphere.
Explain the term 'isostasy' in the context of Earth's structure.
Explain why the Earth's core is hotter than the mantle.
Explain why the mantle is important for plate tectonics.
What is the approximate radius of the Earth? (1) 1,000 km (2) 3,200 km (3) 6,400 km (4) 12,800 km
What is the approximate thickness of the Earth's crust beneath the continents? (1) 5-10 km (2) 30-50 km (3) 100-200 km (4) 500-700 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 responsible for most of the Earth's volume? (1) Crust (2) Mantle (3) Outer core (4) Inner core
The average thickness of the oceanic crust is about ________ km.
The boundary between the crust and the mantle is called the ________.
The discontinuity between the mantle and the core is known as the ________ discontinuity.
The Earth's core is mainly composed of ________ and ________.
True or False: The Earth's core is entirely solid.
True or False: The Earth's inner core is solid.
True or False: The lithosphere is broken into tectonic plates.
True or False: The mantle is completely solid and does not flow.
