GCSE Combined Science (AQA)

622 videos | 38 hours

The Water Cycle

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Ecology Organisation of an Ecosystem

The Water Cycle

3:10 Cycling of Materials
Spec 4.7.2.2 4.7.4.1
Previous The Carbon Cycle Next Decomposition & Decomposers
  • Water is the most abundant liquid on Earth and essential for all cells.
  • 71% of the Earth's surface is covered by water.
  • The water cycle is crucial for providing fresh water to terrestrial life before it drains into the seas.
  • Fresh water comes from precipitation and is utilized by plants and animals on land.
  • The water cycle includes processes such as precipitation, runoff, infiltration, subsurface flow, evaporation, transpiration, and condensation.
  • Precipitation refers to rain, which leads to runoff, or water moving across the land.
  • Infiltration is the process of water seeping into the ground, becoming groundwater.
  • Subsurface flow describes the underground movement of groundwater.
  • Evaporation is the transformation of liquid water into a gaseous state, usually driven by solar energy.
  • Transpiration is the evaporation of water from plant leaves.
  • Condensation occurs when gaseous water cools and transforms back into liquid, forming clouds.
  • These processes are interconnected, forming a continuous cycle that repeats indefinitely, essential knowledge for exams.

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