Science

Water cycle

Water cycle is the continuous movement of water through Earth’s atmosphere, land, oceans, and living organisms. In this Class 9 Science topic, students explore how solar energy drives evaporation and transpiration, how water vapour cools to form clouds through condensation, and how precipitation returns water to Earth. They also study infiltration, groundwater, runoff, and collection, connecting these processes with the chapter Earth as a System: Energy, Matter, and Life and understanding how water supports ecosystems and human life.