The water cycle

Observem el diagrama del cicle de l'aigua

 

Water cycle diagram

• Ara són els alumnes que ens expliquen el cicle de l'aigua

• Resoleu el següent qüestionari.

•  Per saber-ne més llegeix aquestes afirmacions i després comenta-les amb els companys/es

 Did you know?

•  A fixed amount of water recirculates around the Earth. 
• Water moves in certain directions from place-to-place (reservoir-to-reservoir) by only certain processes and pathways.
•  Some processes of transfer are rapid while others are much slower. 
• A conceptual "reservoir" of water is not quite the same thing as a reservoir in which water is stored. When land-based glacial ice melts and runs off into the sea, sea level rises. 
•  When land-based glacial ice forms, sea level drops. 
•  When floating icebergs melt into the sea, sea level doesn't change.
•  Glacial ice is made up of freshwater that had previously fallen as snow. 
•  Evaporation of seawater requires an input of energy; condensation of clouds releases energy.