The earth's structure is separated into four major components: the crust, the mantle, the outer core, and the inner core. Each layer has its unique make-up and can impact life on the earth's surface. For this quiz, you will have to understand how many main layers the earth's internal structure is made of and what the earth's outer layer is known as. Don't just stay on the surface dig deep to learn from this quiz.
One
Two
Three
Crust
Mantle
Core
Iron, nickel
Water, salad oil
Basalt, granite
Yes
No
Not sure
It is compared to the growth of one's fingernails.
It is about 1 cm per year
It is about 10 cm per year
It is about 10 km per year