Earth's Mantle Reading Quiz

What percentage of Earth's total volume is made up by the mantle?

• 84%

• 50%

• 25%

• 10%

What is the main composition of rocks in Earth's mantle?

• Nitrates

• Silicates

• Sulfates

• Carbonates

What is the temperature range of the mantle?

• 1000°C to 3700°C

• 500°C to 2000°C

• 200°C to 1500°C

• 50°C to 1000°C

What is the lithosphere?

• The molten inner core

• The gaseous atmosphere

• The liquid outer core

• The solid, outer part of Earth

What is the asthenosphere?

• A layer of water above the crust

• A denser, weaker layer beneath the lithosphere

• The outermost layer of Earth

• The innermost layer of Earth

What is the Mohorovicic discontinuity?

• The separation between the lithosphere and asthenosphere

• The line between the upper and lower mantle

• The boundary between the mantle and the core

• The division between the crust and the mantle

What is the main cause of plate tectonics?

• The expansion of the Earth's crust

• The slow motion of lithospheric plates on the asthenosphere

• The rapid movement of the outer core

• The cooling of the Earth's surface

What is the transition zone in the mantle?

• A region where rocks undergo radical transformations

• The outermost layer of the mantle

• A layer of water within the mantle

• The innermost layer of the mantle

What is the significance of water in the mantle's transition zone?

• It holds as much water as all the oceans on Earth's surface

• It is the main source of Earth's surface water

• It causes the mantle to melt

• It prevents tectonic activity

What is the lower mantle characterized by?

• Being the source of Earth's magnetic field

• Being cooler and less dense than the upper mantle

• Being hotter and denser than the upper mantle

• Having a liquid composition