Chapter 1: The Marine Environment, Learning outcomes Candidates should be able to: (a) describe the structure of the Earth as core, mantle and crust (b) outline plate tectonic theory

2.  Describe the structure of the Earth, i.e. core,
mantle, crust.
 Explain the plate tectonic theory

4. CORE
MANTLE
CRUST

6.  It is the inner layer of
earth
 The temperature of core
is still hot.
 Rocks will be in liquid
state

7.  It is the middle layer of
earth
 It consist of layers of
Molten Rock
 It has high density of tar

8.  It is the outer layer of
earth
 It is very thin
 Pieces of earth crust is
called Plates

9. By Alfred Wegener (1912)

10.  Alfred Wegener put forward [1912].
 225 million years ago there was only one continent
called Pangaea.
 200 million years ago they split into separate pieces.
 Which drift apart and form different continents.
 Continents are up on the plates.
 It move due to the tectonic activity.