D. Short Answer Type Questions
1. What do you understand by (a) drought, and (b) flood?
2. What are the three states of water? How do they convert fror
3. How is rainwater different from sea water?
4. What do you understand by rainwater harvesting?
5. Why should we conserve water?
Answers
Answer:
DROUGHT- A drought is a period of time when an area or region experiences below-normal precipitation. The lack of adequate precipitation, either rain or snow, can cause reduced soil moisture or groundwater, diminished stream flow, crop damage, and a general water shortage.
FLOOD- Flooding is an overflowing of water onto land that is normally dry. Floods can happen during heavy rains, when ocean waves come on shore, when snow melts quickly, or when dams or levees break. Damaging flooding may happen with only a few inches of water, or it may cover a house to the rooftop.
Answer:
1] Floods and droughts: too much is like not enough ! ... Droughts occur when an abnormally long dry period uses up available water resources. Floods happen when watercourses or rain swallow up land that is usually uncovered. These natural disasters are often made worse by human action.
2]Solid water – ice is frozen water. When water freezes, its molecules move farther apart, making ice less dense than water. ...
Liquid water is wet and fluid. ...
Water as a gas – vapor is always present in the air around us.
3]Rain water is the source of ground water while sea water is not. Rain water is fresh water while sea water is salty rain water is natural process in water cycle occuring due to precipitation of cloud from the sky while sea water is not suitable for drinking
4]Rain water harvesting is a technique of collection and storage of rain water in surface (storage tanks) or sub surface aquifer before it is lost as surface runoff.
5]Conserving water is important because it keeps water pure and clean while protecting the environment. Conserving water means using our water supply wisely and be responsible. As every individual depends on water for livelihood, we must learn how to keep our limited supply of water pure and away from pollution.
Explanation: