Fill in the blanks
1. Only 0.25% of the available ground water can be economically extracted with ……. technology.
2. Transpiration takes place from ………
3. When the air is ……… evaporated water tends to stay close to the water body.
4. ……. is the tiny droplets of water hanging in the air.
5. In freezing rain, the drops of water are usually greater than ………. in diameter. 6. Hail forms only in clouds during thunderstorms.
7. ………. appears like a powdery mass of ice. 8. The percolation process represents the flow of water from ………. zone to the ………. zone.
9. The sub – surface runoff is usually referred as ……
10. Unit for measuring run off rate is ……