Geography : Facts of Earth

The Earth

Age : 4.6 billion years
Mass : 5.976 ×1024 kg.
Volume : 1.083 × 1024 litres
Mean Density : 5.518 kg/litres
Shape : An oblate spheroid or a geoid.
Size : Polar diameter 12,713.54 km;
Equatorial diameter 12,756,32 km;
Polar circumference 40,008.00 km and
Equatorial circumference 40,075.16 km.

Area : Total surface area 509,7000,000 sq. km; Land area about 148,400,000 km (about 29
per cent of the total area); Water area about 361,300,000 sq. km. (about 71 per cent
of the total surface area).
Motions : (i) Rotation (spinning motion on polar axis), once every 23 hours 56 minutes and 4.09 seconds
(ii) Revolution (around the sun), once every 365 days, 6 hours, 9 minutes and 9.54 seconds.
Surface Features : Highest point on land - Mt Everest 8,848 m above the sea level. Lowest area on  landshore of Dead Sea (399 m below sea level). Mean height of land 756 m.
Ocean Depths : Deepest area - Mariana Trench in Pacific Ocean south-west of Guam (11,033 m below the sea surface). Average depth of oceans 3,730 m.
Chemical make up of the Earth’s Crust : (percent by weight): oxygen 46.6, silicon 27.7, aluminium 8.1, iron 5.0, calcium 3.6, sodium 2.8, potassium 2.6, magnesium 2.0 and other elements 1.6.
Mean Surface Temperature : 14°C, Highest temperature 58°C at Al Aziziyah, Libya and the lowest  temperature -89.6°C at Vostok Station in Antarctica.
Inclination of the Polar Axis to the Orbital Plane : 23 deg. 26 min. 59 second.
Orbital Speed : 29.8 km/s
About the Sun
Mean Distance From the Sun : 149,598,500 km (one astronomical unit). The maximum distance at the time of aphelion between July 2 and 5 is about 152 million km and the minimum distance at perihelion between January 2 and 5 is about 147 million km.