Earth

General Knowledge Geography

Earth (Prithvi in Hindi)

God of fertility and vegetation

  • Volume of earth  1083.21×1012km3
  • Diameter  12,742 km
  • Density  5513 kg/m3
  • Radius  6371km
  • Surface area  Total 510,072,000km2 (Land 148,940,000km2 and water 361,132,000km2)
  • Mass  5.972,168×1024kg
  • Composition  78.08% nitrogen, 20.95% oxygen (dry air), 1% water and small amounts of other gases like argon, carbon dioxide, neon, helium, methane, krypton and hydrogen.
  • Number of moons/satellites- Only 1 that is moon
  • Shape of earth is rounded into an ellipsoid, bulging at its equator.
  • Earth rotates on its axis anticlockwise (west to east)
  • Earth revolves around sun anticlockwise (west to east)
  • Densest planet in the solar system.
  • Alternative names of earth are- The world, the globe, Sol III, Terra, Tellus, Gaia, Mother earth.
  • 80% part of earth is covered by water (Oceans, seas and other waterbodies) and 29.2% of earth’s crust is covered by land.
  • Colour Blue Planet. 
  • The earth is a member of a group of celestial bodies called the solar system. This group comprises the sun and the celestial bodies revolving around it.
  • Earth is third planet in terms of distance from the sun and the only astronomical object known to harbor life.
  • Fifth largest planet in the solar system.
  • Third planet from the sun.
  • Venus and mars nearer planet to the earth.
  • Earth is divided into two hemisphere by latitude into the polar Northern and Southern hemispheres or longitude into the continental Eastern and Western Hemisphere. 
  • Earth is formed 4.5 billion years ago from gas and dust in the early solar system.
  • Average distance between the sun and the earth is approximately 149.6 million km.
  • It takes 23 hours 56 minutes to rotate on its axis.
  • It takes 365 days, 5 hours and 48 minutes to revolves around the sun.
  • Due to presence of water on its surface it is called watery planet or a blue planet.
  • Presence of atmosphere rich in carbon dioxide, nitrogen, oxygen abundance of water and right temperature makes the suitable for plants and animal life.
  • Earth has a dynamic atmosphere, which sustains earth’s surface conditions and protects it from most meteoroids and UV light at
  • In 1543 Nicolaus Copernicus detailed in his radical theory of universe that the earth with other planets revolved around the sun.
  • Satellite: – Moon is the only natural satellite of the earth.