Explanation of water cycle: 3 Marks
Rivers, lakes, ponds and other sources get water from precipitation and melting of glaciers. The water from these sources along with precipitation replenishes the groundwater through infiltration. The groundwater runs off into the seas and the water on the surface reaches the seas through rivers.
From the sea, the water evaporates, reaches the atmosphere and forms clouds. Some ground water also reaches the atmosphere through evaporation and transpiration.
The clouds are responsible for precipitation or rains and thus the water again reaches the rivers, lakes, and ponds.
So, the water in these resources keeps flowing and never gets over.