Chapter 1 The Structure Of The Earth Flashcards
I am solid rock
I cover the surface of the earth
I am thicker when I am on land than at sea
I am not one piece
I am divided into sections called plates
I am similar to the thickness of the skin on an apple
What am I?
The crust
Name the four layers of the earth in order starting from the outside
Crust, mantle, outer core, inner core
I am composed of molten magma
I am under the crust
I flow in currents
What am I?
The mantle
I am very hot, between 3000 and 5000 degrees
I am in the centre of the earth
I am made mostly out of iron
I am solid in the centre
I am divided into inner …… and outer ……
What am I?
The core
The earths crust is dived into …….
Plates
Explain the term plate tectonics
The study of plate movements and their effects
What is the effect of plates sliding past each other
Earthquakes
What are the effects of plates separating
Volcanoes, mid ocean ridges, new islands
What are the effects of plates colliding
Earthquakes, volcanoes, fold mountains
Plates separating is a ………… plate boundary
Constructive
Plates colliding is a …………. plate boundary
Destructive
What causes plate to move?
Convection currents
I am hotter the closer I am to the core I rise when I am hot I fall when I cool down I cause the plates to move What is this process called?
Convection currents
What was the huge continent before it broke up called?
Pangea