Structure of the Earth!

Get ready to dig deep, gang, and join us on a fascinating journey to the centre of the Earth!...

The secrets buried inside our planet are revealed by recording and studying things called seismic waves. Caused by things like earthquakes, explosions and the movement of our oceans, there are two types of seismic wave – a shear wave, which won't travel through liquid; and a pressure wave, which moves through both liquid and solids. These waves show that the Earth is made from five layers: the inner and outer core, the lower and upper mantle, and the crust. 


Structure of Earth

Inner Core


Temperature: 5,000°C - 6,000°C
State: Solid
Composition: iron and nickel

The Earth’s inner core is a huge metal ball, 2,500km wide. Made mainly of iron, the temperature of the ball is 5,000°C to 6,000°C – that’s up to 6,000 times hotter than our atmosphere and scorching enough to make metal melt! The metal at the inner core stays solid because of the incredible pressure surrounding it.



Outer Core


Temperature: 4,000°C – 6,000°C

State: Liquid

Composition: iron, nickel, sulphur and oxygen


This liquid layer of iron and nickel is 5,150km deep. The outer core flows around the centre of the Earth, and the movement of the metals creates our planet’s magnetic field.



Lower Mantle


Temperature: 3,000°C
State: solid
Composition: iron, oxygen, silicon, magnesium and aluminium

 

The lower mantle is found between 670km and 2,890km below the surface, and is made from  solid rock. The rock is hot enough to melt, but is solid because of the pressure pushing down on it.



Upper Mantle


Temperature: 1,400°C – 3,000°C

State: liquid / solid

Composition: iron, oxygen, silicon, magnesium and aluminium

 

This layer is up to 670km below the Earth’s surface. The lower part of the upper mantle is made from both solid and melted rock (liquid), while the rock in the upper region is stiffer, because it’s cooler.



Crust


Temperature: Around 22°C

State: Solid 

Composition: Oceanic crust made up of iron, oxygen, silicon, magnesium and aluminium.

                        Continental crust made up of granite, sedimentary rocks and metamorphic rocks.

 

The Earth's surface is covered by its thinnest layer, the crust. Land is made of continental crust, which is 8km to 70km thick and made mostly from a rock called granite. The layer beneath the ocean bed is made of oceanic crust, which is about 8km thick and made mainly from a rock called basalt.



The Earth's Crust






By studying rocks and meteorites (rocks from space), scientists believe the Earth is about 4.5 billion years old!

 


Issustration: Getty Images UK

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great website tells me a lot of stuff I didn't already know. it gives me more information than I need
diksha
best answer with clean picture
321Katniss123
Woah
CHANCE
EVERYTHING IS AWESOME
John
Cool
John
Awesome information
LemonBob
COOL interesting and fun
josh123
nice web
britney
Awesome cool fact
Ian
Nice
__KayyyMT__
GOOD JOB!!!
school12345678910
great web
calebba
info lots of it
calebba
this is awsome
school12345678910
good website to learn
Lucyfox412---
Awesome! Right.
sakina
I loved it, was so easy to take notes on this for my science sol &lt;3 :)
JENY
awesome and incredible plus fab
JENY
INCREDIBLE FABULOUS OF ALL TIMES AND FROM THE WHOLE WORLD
Coconut
Helped me loads
john
great facts!!!!!!!!!!!!!!!!!!!!!!!!
amara
cool
DWrecka Wasley
Thank you soo much this helped me get an A on a presentation
Steveee
Hey this website is cool
Steveee
Wow this is great
Jelly
this is amazeballs like so great love it
j palmer
This is cuwl
#diversatlol.com
There's some cool facts in there
Eager
:)
lioness123
thanks for the info help with homework and school ;] lol i don't like school but this made it fun ;] ;] ;] ;]
lioness123
it was so helpful thanks ill use this site more often and maybe buy a book or three ill definitely recomed it to my friends at school
Liam
I love it
Liam
Awesome
coolkat
awesome
-A
good site
KAYLA_WALKER66
I love this
Kolt_Matthews
this website is really cool and i go to it all the time
jsmith
I LOVE THIS WEB SITE!
Tanner_The_Man
This website is pretty cool.
peter
This helped me with my homework
Kirbythepikachu
AWESOME!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Battle_monkey
This website is sweet
Batman_is_me13
Wow
superman_is_me13
wow
superman_is_me13
good thinking
Soph12345
Thanks!! Helped me so much with my project!
jamie
This website is so cool it reminds me of antarctica
hazaz
TROLL
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Awesomeness
This website is awesome! It helped me a LOT when I was studying for my test!
annanananananana
it twas k
xX_C0Xx
Love This Website
xX_C0Xx
Helps So Much When Your Doing A Project.
jeff
My name is jeff
Michelle
Awesome site! Heeeeey
LOL
Love this website
hiiii
coolndude
Jhonothan
This web site is so awesome because I can always find out new things about new stuff
Vir
This is just what I need for my primary kids...Thanks =)
gigle
its so cool
carterwhigham
this really helped me on my science fair project.
CoolPheget
Yeaaaaahhh best site ever
Matthew
Ana
Melanie-_
hola hi i love this page keep on learning!!
blahhhh
This is cool and helpful
Caroline
Awesome!
Ana
This is awesome!! You should try playing Animal Jam its so fun and cool!!!!!!!!!!!!
Tulio
Cool
Moose
Thank you Ngkids.com!!!
Moose
Thank you mg Kids!!!!!!!
LOL
love this web site awesome : )
LOL
love this web site awesome : )
Moose
Cool and very helpful
gtabros
kool it awsome
ks
very cool i needed that i love it really dude dude totally / 00
ks
so cool dude i like it really lol so cool dude
ks
very great and helpful
cool dude
wow gust wow
Bobby
Hi I'm bobbt
niyha
wow
niyha
WOW COOL
Mia_Khalifa
omg this is omg... like just soooooo amazing &lt;3 &Acirc;&pound;&gt; | \____/
Jeff
My name is Jeff and I am 21 baraly
math200
AWESOME
ChickenSssssssssssssstrips
lol made me lol yaaaaaaaaaa
Micshawnica
wow cool
unknown234
this is amazing it helped me very much
Madison
hello
unkown
this was amazing help! exactly what i was looking for!
Floppy
Very cool website!!
PandaFan
This is very Helpful thank you! And a nice website!
PandaFan
This is great and it helps thanks!
Liza
cool
Fluffums
OMG LOL !!!!!!!!!!!!!!
Owen
Coooooool dude
Owen
COOL
Yohan
This is so kool :) :):):):):):) I love it's sososososososos Kool
ryanthomas20014
Love it!
Leo
lol
Ben
this is cool
maddy
this is an awesome website it gave me good facts for my projects
Brayden
This was very helpful on a project that i am doing in science! I got an A+ because of it! THANK YOU!
Brebre123
I love this site it's better than the rest
YOYO
IT COOL THANKS
bre
awesome
bre
awesome
Lillian
This is so cool is helping me a lot.
Ayden
Really helpful.
cowboy
the best cool awesome
higrcgh
it helped a lot!!!
higrcgh
I like this site and I think it has authentic data written. The diagram was helping to understand better.
sophia
coool
bob
epic
kathrin
Nice site
kathrin
Cool site for geniuses.
kathrin
It's an amazing site
Floppy9
The earth is awesome
Sofia
Helped me with understanding schoolwork about natural disasters and layers of the Earth.
dani
hi
Jenessa
This is really good information. Its really easy to understand. I definitely need this for my Geography Assessment.
David Tillman 4646
awsome
Yannie
It gave me great imformation and yea!!
Yannie
It gave me great imformation and yea!!
Marten
did not know that the sun was a billion years old a great story love the selection of the inner core this rocks
Reya
I appreciate that taught me to learn about the structure of the earth in science for education in school.
Sheralee
Excellent helped loads
sams
good nice info
Mystery
A good resource for fun exciting facts. It is also good for science......
Oscar46
wow yea that cool
jaquen1
this is neccesary for me and jaquen #2
Oscar46
cool
Andrew
Cool
AR
great info thanks
Victoria
Great info
Eddy
I figured out that the cores are pretty far apart
lily
this helped me in school a lot
John
good site
333
love it help me sooooo mach
Luckystrike95
It's good advice thank you.
Maria
This helped me so much on my report! Thanks!!
Gabby
The best side ever
Elizabeth
I love it
9924
AWSOME
paola
cool
Logan davis 123 :)
WOW!!!!! the earth is so old hahahahaha:)
Destini
I like this app
Cheyenne
Cool
Kyle
This information rocks!
lola
this is a really good website and i wouild like to hear some more about this and cheers
crowns_up
this is for 12vies.....
bale
col
bale
it is cool
emily
cool
david
the earth is cool
leo
cool
leo
this is amazing
Anon
I like the way the mantle is split up.
Shanzie
cool

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