1.3 The Structure (a particular arrangement of parts)
and shape of the Earth
The Earth could be compared to an onion which
has many layers. This can be seen in figure 1.9.
The outer layer of the Earth is what we live on. It
is called the Crust (the hard outer surface layer of bread or
pie). Just
like the outer surface of a loaf (an amount of
bread that has been shaped in one piece)
of bread which is
also called the crust. On the crust, there is land
and water.
Crust, Mantle (the part of the Earth below the crust and
surrounding the core),
Outer Core, Inner Core (the central
part of an object, or the most important part of sth).
In the past, people believed that the Earth was
flat. Therefore, they were afraid to travel to distant
lands. They thought if they travelled too far, they
would reach the End of the Earth and fall off it.
However, this is incorrect. The Earth is Circular
(shape like a circle, round)
in shape. A Portuguese
born voyager (a person goes on a long journey, especially by
ship to unknown places),
who worked for Spain, Called
Ferdinand Magellan proved that Earth is round.