Structure of the Earth Flashcards
How big is the Earth’s diameter?
12 800km
What is the earth made of?
A crust, mantle and core with an atmosphere that surrounds the earth
What is the crust?
A very thin layer at the surface of the earth between 5km and 70km thick
What is the mantle?
It is under the crust and is about 3000km thick. It goes almost halfway to the centre of the earth. It is entirely sold but parts of it can flow very slowly
What is the core?
It is about half the diameter of the earth and has a high proportion of magnetic metals iron and nickel. It has a liquid outer part and a solid inner part
What is the atmosphere?
It surrounds the earth. Most of the air is within 10km of the earths surface and most of the atmosphere is within 100km of the earths surface
Where do the raw materials come from that we depend on?
The crust, the oceans and the atmosphere
