Page 41 - Ultimate Visual Dictionary (DK)

THE EAR TH

EXTERNAL FEATURES AND COMPOSITION OF THE EARTH
INTERNAL STRUCTURE
OF THE EARTH
Atmosphere 300 Other elements less than 1 %
miles (500 km) deep
Greenland
Aluminum 0.4% Calcium 0.6%
Crust 4–25 miles Nickel 2.7%
(6–40 km) thick Sulfur 2.7%
Magnesium 17%
Silicon 13%
Mantle about Oxygen 28%
1,740 miles (2,800
km) thick
N O R T H A T L A N T I C Iron 35%
O C E A N

Outer core
1,430 miles
(2,300 km) thick

Surface temperature
between -126°F and
136°F (-88°C and 58°C)
Cyclonic
storm
Core temperature 11,900 °F (6,600 °C)
Molten core of Solid inner core
iron and nickel of iron and nickel E U R O P E
1,500 miles (2,400
Gutenberg discontinuity km) in diameter
(boundary between outer Atlas Mountains
core and mantle)
Sahara (desert
Mantle of mostly solid region)
silicate material A F R I C A

Mohorovicic
discontinuity Congo Basin
(boundary (tropical rain
between mantle forest)
and crust)
S O U T H S O U T H
PA C I F I C A M E R I C A S O U T H A T L A N T I C
O C E A N
Crust of silicate rock O C E A N

Land forms about
30% of surface
Amazon Basin (tropical
rain-forest region)
Cloud typically covers about
Andes (mountain range 70% of surface
near crustal plate
boundary)
Oceans cover about
70% of surface
Earthquake region along
crustal plate boundary
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