EARTH'S LAYER

What are the three main layers of the Earth?

• Crust, Mantle, Core

• Atmosphere, Lithosphere, Hydrosphere

• Outer core, Inner core, Asthenosphere

• Troposphere, Stratosphere, Mesosphere

Which layer of the Earth is the thinnest under the ocean and thickest under continents?

• Mantle

• Core

• Asthenosphere

• Crust

What is the composition of Oceanic crust?

• Iron and magnesium

• Basalt

• Granite

• Silicon and oxygen

Which layer of the Earth is the heaviest and most dense?

• Inner core

• Outer core

• Crust

• Mantle

What is the top portion of the mantle called?

• Troposphere

• Lithosphere

• Asthenosphere

• Hydrosphere

Which layer of the Earth contains mostly iron and nickel?

• Crust

• Mantle

• Outer core

• Inner core

What is the relative position of the core in the Earth's layers?

• Top portion

• Inner layer

• Middle layer

• Outermost layer

What is the density of the Earth's crust compared to the other layers?

• Heaviest

• Thickest

• Most dense

• Least dense

Which layer of the Earth is solid rock mostly made up of silicon and oxygen?

• Mantle

• Crust

• Outer core

• Inner core

What is the main feature of the asthenosphere?

• Contains iron and magnesium

• Slow flowing liquid

• Highly viscous and mechanically weak

• Solid rock