Earth's Layers and Structure — Quiz
1.
Which layer of Earth is made of LIQUID iron and nickel?
2.
What is the thickest layer of Earth?
3.
How do scientists know that Earth's outer core is LIQUID?
4.
What is lava?
5.
Describe the four layers of Earth in order from outermost to innermost. Include the state of matter and one key fact for each.
6.
Why is Earth's magnetic field important, and which layer generates it?