Earth Layer Form 1 Assignment Science DLP

Secondry School

1. Earth’s Structure

The Earth is made up of layers of metal and extremely hot rock. Surrounding
the Earth are layers of gases, these are called the Earth's atmosphere. The
atmosphere controls the temperature of the Earth and provides air to breathe
Italso helps keeps out the Sun's rays that can harm life.

Like a Peach

‘The Layers of the Earth are like a peach.
The thin skin is like the Earth’s outer
crust. The soft peach flesh is like the
Earth's mantle. The hard peach stone is
like the Earth's hard metal core.

Mantle of
hot rock

Layers of Rock and Metal 4 Outer core

ofliquid metal
The Earth has three main layers, the thin nme

outer crust we live on is cool, hard rock. k

¡Under coa i very ER bok aver Innercore
called the mantle. In the middle of the of solid metal
Earthis the core. t's made ofa solid

metal inner core surrounded by a hot

liquid metal outer core

Some of the crust is covered by
oceans and seas. About 140
million square miles (362 million
sq km), or nearly 71% of the
Earth's surface.

Gravity
Me eee
called rar pulls ou beck dows lathe
same way, Esrth's gravity pulls everything
toward it's centre. It stops things from Some of te Earths
ee ie ee

fall to the ground. crust is dry land with

soil on top of rock.

2. EARTH'S STRUCTURE

The inside of Earth is made up of layers. These layers aré
based on the mixture of elements that composes them.

Crust’ -

The crust is a solid layer made up of land The mantle makes up roughly 67% of rele
and ocean floor. It ranges in thickness mass. It is made up of hot rock and contains
from about 5 miles (oceanic crust) large amounts of iron and magnesium,

to 25 miles (continental crust)
The oceanic crust is mostly
composed of basalt. The
continental crust
is mainly made
of granite,

The upper part is composed
mainly of a type of rock
S called peridotite. The
D) mantle is about

A, 1800 miles thick

u

Outer Gore Inner Gore
The liquid outer core _ The solid inner core is
is composed mainly of iron mostly made of iron and
and nickel. It is roughly 1400 y nickel. It is approximately 800
miles thick. miles from the inside edge of the outer

. core to the center of the inner core.

3. Loyersom EARTH

D MANTLE |

INNER MANTLE