Learn all about the Earth's water cycle. Physical processes -The Earth and beyond - Water and weather Learning Points Water constantly recycles itself through a process called the water cycle. Evaporation: the change of liquid water into water vapour due to heat. Condensation: the cooling of water vapour into liquid water. Precipitation: rain, hail or snow. A Twig Curriculum Film. Delivering key learning points. Get straight to the facts in just three minutes – directly linked to core learning, Twig's curriculum films will fit neatly into your lesson plans.