Earth's Layers and Planets

Which layers of Earth are mostly made of solid material?

• the cores
• crust & inner core
• crust & mantle
• mantle & outer core

Which layer of earth is composed primarily of iron and nickel?

• the crust 
• the cores
• the mantle

What is the first layer of Earth?

• crust
• inner core
• outer core
• mantle

What is the second layer of Earth?

• crust
• inner core
• outer core
• mantle

What is the third layer of Earth?

• crust
• inner core
• outer core
• mantle

What is the fourth layer of Earth?

• crust
• inner core
• outer core
• mantle

What is Earth's thinnest layer?

• crust
• inner core
• outer core
• mantle

Which of Earth's layers is composed mostly of liquid metal?

• crust
• inner core
• outer core
• mantle

What is Earth's thickest layer?

• crust
• inner core
• outer core
• mantle

Which of Earth's layers has the lowest density?

• crust
• inner core
• outer core
• mantle