Earth's Structure

Which layer is a dense, solid ball of metal?

• Crust
• Mantle
• Inner Core
• Outer Core

Which layer is solid; made of dry land and ocean floor?

• Crust
• Mantle
• Outer Core
• Inner Core

Which layer is molten (liquid) metal of iron and nickel?

• Crust
• Mantle
• Outer Core
• Inner Core

Which layer is the thickest and made of hot solid rock that can bend?

• Crust
• Mantle
• Outer Core
• Inner Core

A thin layer of gases that forms around Earth's outermost layer is called the _____?

• Geosphere
• Hydrosphere
• Atmosphere
• Biosphere

Scientists think that the _______, made of liquid iron and nickel, moves to produce Earth's magnetic field.

• Crust
• Mantle
• Outer Core
• Inner Core

What type of rock forms from the cooling of magma and lava?

• Igneous 
• Sedimentary
• Metamorphic
• Magma

What type of rock forms when pieces of sediment deposit in layers?

• Igneous
• Sedimentary
• Metamorphic
• Magma

What type of rock forms when heat and pressure inside Earth's crust change the materials of a rock?

• Igneous
• Sedimentary
• Metamorphic
• Magma

Once molten rock reaches Earth's surface, it is known as ________?

• Liquid fire
• Magma
• Metamorphic rock
• Lava