The Earth

The Earth
Age: 4.6 billion years
Distance from Sun: 150 million km
Surface area: 510 069 120 sq km
Land surface (approximate) : 148 million sq km/ aprox 29% of total area
Water surface (approximate) : 361.6 million sq km/ approx 71% of total area
Diameter (equator ): 12 757km
Diameter (meridian ) : 12 714km

Ice Kingdom
Ice permanently covers approximately 10% of the land surface of the Earth, with the majority of the ice cover at the South Pole. But there have been several great ice ages in the past, when a much larger part of the Earth’s surface was covered with ice. The most famous, commonly known as ‘ the Ice Age’, was during the Pleistocene period from approximately 2 million years ago to approximately 10 000 years ago.

Composition of the Earth’s crust
Oxygen: 46.60%
Silicon: 27.72%
Aluminium: 8.13%
Iron: 5.00%
Calcium: 3.63%
Sodium: 2.83%
Potassium: 2.59%
Magnesium: 2.09
Others: 1.41%

OCEANS
Water covers approximately 71% of the Earth’s surface. Four oceans were traditionally recognized, with the International Hydrographic Organization (IHO) officially delimiting a fifth, the Southern Ocean, in 2000. However, the Atlantic Ocean and the Pacifica Ocean are often divided into the North Atlantic and South Atlantic, and North Pacific and South Pacific leading to the recognition of seven oceans.

Ocean	Area	Average depth	Greatest depth
Arctic	14 056 000sq km	1330m	Molloy Deep 5680m
Atlantic	76 762 000sq km	3700m	Puerto Rico Trench 8648m
Indian	68556 000sq km	3900m	Java Trench 7725m
Pacific	155 557 000sq km	4300m	Mariana Trench 11040m
Southern	20 327 000sq km	4500m	South Sandwich Trench 7235m

Water, Water, Everywhere

The Pacific Ocean alone covers approximately 28% of the Earth’s surface, making this single ocean bigger than all the land mass of the Earth.

[人在北德]

还纯英文的！厉害啊！

[马甲丢了]

猫呀，你可真能忽悠啊。这一上来就是上下五千年，环盖全世界！好，大气！有看头！再接再厉！