Structure of the Earth

The Earth

The Earth

Rotatory motion

Movement translation

Movement translation

The earth and its satellite the Moon

It is the third planet in distance to the Sun and the fifth largest of all the planets in the solar system.

It is formed by a gaseous envelope called hydrosphere and another salid called geosphere. 

It atmosphere is mainly composed of oxygen and nitrogen, necessary for life.

Is a planet without rings, with a sngle satellite, the moon .

As for as we know until now , it is the only planet with life.

The Earth was formed as the name time as the sun and the other planets, about 4.6 billio years ago.

71% of the planet's surface is liquid.

The Earth revolves around it self on an imaginary axis; that is to say, as a top and little lying to oe side.

It takes an entine 24 hours turn, that is a whole day.

This movement, called rotation, makes th days and nights exist .

In addition the Earth goe around the sun. It takes 365 days and 6 hours. 

This movment is called translation, and it is responsablepor th seasons Spring, Summer, Autum and Winter

Basic data of planet Earth
Size: equatorial radios	6.378 Km
Orbit from sum (average distance from the sun)	149.600.000 Km
Diameter	12.742 Km
Medium temperature	15 ºC
Day (rotation on the axis)	23,93 hours
Year (orbits around the sun)	365,256  days