i. People obtain groundwater through tube wells and handpumps.
ii. Three forms of water are solid, liquid and gas.
iii. The water bearing layer of the earth is aquifer.
iv. The process of water seepage into the ground is called infiltration.
v. The amount of water recommended by the United Nations for drinking, washing, cooking and maintaining proper hygiene is a minimum of 50 litres per person per day.
i. The freshwater stored in the ground is much more than that present in the rivers and lakes of the world. True
ii. Water shortage is a problem faced only by people living in rural areas. False
iii. Water from rivers is the only source for irrigation in the fields. False
iv. Rain is the ultimate source of water. True
v. Bawri was the traditional way of collecting water. True
Ans. 22 March is celebrated as the world water day.
Ans. The water found below the water table is called groundwater.
Ans. The process of seeping of water into the ground is called infiltration.
Ans. We celebrate water day every year to attract the attention of everybody towards the importance of conserving water.
Ans. At places the groundwater is stored between layers of hard rock below the water table. This is known as an aquifer.
Ans. The main processes involved in the water cycle are evaporation, transpiration, condensation, precipitation, runoff, and percolation.
Ans. The water cycle is important because its process provides Earth with the natural, continual water supply all living things need in order to survive.
Ans. The rainwater and water from other sources such as rivers and ponds seeps through the soil and fills the empty spaces and cracks deep below the ground.
Ans. Most towns and cities have water supply system maintained by the civic bodies. The water is drawn from nearby lakes, rivers, ponds or wells. The water is supplied through a network of pipes.
Ans. Most of the water that we get as rainfall just flows away. This is a waste of precious natural resource. The rainwater can be used to recharge the groundwater. This is referred to as water harvesting or rainwater harvesting.
Ans. We can use drip irrigation to minimise the use of water. Drip irrigation is a technique of watering plants by making use of narrow tubings which deliver water directly at the base of the plant.
Ans. The water table does not get affected as long as we draw as much water as is replenished by natural processes. However, water table may go down if the water is not sufficiently replenished.
Ans. A farmer using water in the field can also use water economically by using drip irrigation technique. Drip irrigation is a technique of watering plants by making use of narrow tubings which deliver water directly at the base of the plant.
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