UNIT  6  HYDROSPHERE
The hydrosphere is all the water on the Earth. We can find water in the three states:

• solid: snow, ice
• liquid: oceans, seas, rivers, lakes
• gas: water vapour

The water cycle represents the constant circulation of water between the Earth´s surface and the atmosphere:

Here you have an interactive lesson and game about the water cycle:

 

UNIT 6  THE  EARTH
The Earth is a terrestrial planet, this means that it is made up mostly of rocks rather than gas (as Jupiter). It is the largest of the four terrestrial planets in size and mass. Terrestrial planets are inner planets.
The Earth consists of four spheres:

• geosphere
• hydrosphere
• atmosphere
• biosphere

 

If you want to read more information click on the pictures and visit the different spheres.

If you want to see the four spheres in a real picture, click on the image below:

Learn more about Earth´s spheres, click on this animated gif: