Geosphere Learning Quiz

What is the approximate thickness of the geosphere?

• 9000 kilometers

• 6730 kilometers

• 8000 kilometers

• 5000 kilometers

Which layer of the geosphere is the thinnest?

• Core

• Crust

• Lithosphere

• Mantle

What is the primary composition of the mantle?

• Liquid iron

• Molten rock

• Sand

• Solid rock

What causes volcanoes to erupt?

• Formation of magnetic fields

• Magma reaching the surface

• Movement of tectonic plates

• Earthquakes

What is the outer part of the core made of?

• Molten rock

• Liquid iron and nickel

• Sand and minerals

• Solid iron