130x Filetype PPTX File size 0.05 MB Source: ocd.lcwu.edu.pk
• Crucial for life on planet • Also called as water cycle • Constantly cycled through atmosphere, river ,ocean, land 3 steps • Water cycle has 3 steps • Evaporation and Transpiration • Condensation • precipitation Evaporation and Transpiration • Water is lost from land and water bodies • Water is present in two forms • Ground water(lost by evaporation • Surface water (lost by transpiration • Evaporation • sun heats up liquid water and changes it to gas . water that is evaporated from earth oceans etc rises in atmosphere. • Transpiration • Process of evaporation from plants is called transpiration condensation • As water in form of gas rises higher in atmosphere. • it starts to cool and become a liquid again this is condensation. • When large amount of water condenses it forms clouds.
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