What is the Structure of the Earth?
from earthquakes which travel through the
give information about the structure of the inside of the planet.
The outer crust (called the lithosphere) is made from solid rock.
The mantle is made from hot
flow only very very slowly.
The mantle behaves more like a solid than a liquid.
The mantle goes down nearly half way to the Earth's centre.
The density of the
rocks which are found in the
crust is lower than the density of the planet as a whole.
This means that the core of the Earth must be made
from a material that is more dense than rock. It is
believed that the core is made from a mixture of iron
and nickel. The outer core is liquid, the inner core is solid.
which travel through the Earth
as they meet the different layers (see the next page).
Links Waves Search Questions
gcsescience.com Contents Index Quizzes gcsescience.com
Copyright © 2012 Dr. Colin France. All Rights Reserved.