PLANET EARTH

PLANET EARTH

1. IMAGINARY LINES

   • Meridians: Greenwich meridian(W,E) they measure the longitude.
   • Parallels: Equator (N,S) They measure the latitude.

2. THE EARTH´S MOVEMENTS

   • Rotation:Day and night =24H.It goes around its own axis.
   • Revolution: seasons=365 days+6H. It is a complete orbit of the sun.

3. THE EARTH´S LAYERS

   • Atmosphere: Layer of gases (nitrogen, oxygen)
   • Hydrosphere: layer of water (solid, liquid, gas).
   • Geosphere: solid part.
     • Crust, where we live.
     • Mantle it´s made up of magma.
     • Core is the hottest layer. it´s made up of iron.