Chapter 1 Earths Structure Flashcards
Earth is one of ______________ planets in our solar system
eight
Earth was formed about _________ years ago.
4.5 billion
The Earth is made up of how many layers?
3
What is the layer that we live on called?
Crust
The ___________ is made of of the inner and outer layers.
Core
Earth is not one continous layer. It is broken up into different sections called.
Plates, that fit together like a jigsaw.
There are several large and several smaller ones. They float on semi molten magma of the mantle. The edges of the plates meet at plate____________.
Boundaries
What happens at a tranform boundary?
Plates slide past each other and you can find fault lines and earthquakes there.
What happens at a destructive plate boundary?
Plates collide and crust is destroyed. You will find fold mountains, volcanic mountains and earthequakes.
What happens at a constructive plate boundary?
Plates seperate and creates new crust. You can find mid ocean ridges, volcanic ilsnads and volcanic mountians there.
Plates move on semi molten magma in the mantle. The magma moves in a circular motion becuase of ________ __________.
Convection currents.
The process of continental drift is where the continents are moved around? THe continents began as one large landmass, know as _________.
Pangaea.
