Uses of water

1.How Does Water Help in Extinguishing Fire?

• The basic idea followed while extinguishing a fire is to cut the supply of oxygen to the burning substance.
• As the water is poured over a substance, it cuts the supply of oxygen and extinguishes the fire.
• But this method is ineffective in case of fire caused due to oil.
• Also water should never be used in case of a fire caused due to short circuit or chemical fire. It may worsen the situation.

2.What Will Happen if the ‘Sedimentation’ or ‘Aeration’ Are Done Before ‘Filtration’ in Wastewater Treatment?

• The wastewater comprises different types of waste that must be segregated before treatment.
• Filtration helps remove large insoluble waste at the very first step, leading to a considerable decrease in the garbage in the wastewater.
• This decrease in waste helps in the efficient processing of further steps.

3.What Is Hydroelectricity? How Is Hydroelectricity Produced?

• Most hydroelectricity generating plants are equipped with a machine called a turbine.
• The water from a height is allowed to fall on these turbines, making them rotate at a considerable speed.
• These turbines are attached to generators which produce electricity due to the rotation of turbines.

4.The Farmer Makes Trenches in the Farm Before Sowing the Seeds. What Is the Purpose of Doing This?

• Making the trenches in the farm and sowing the seeds on top aids the flow of water.
• Trenches in the field allow the even supply of water to all the seeds and later to the plants.
• It prevents water logging and promotes a good yield of crops.

5.What Happens to Our Bodies if We Do Not Drink Water for Too Long?

The effects of lack of water in our body are as follows:

• Feeling of thirst, dehydration and reduced urination.
• Dry mouth, weakness of muscles and dizziness.
• Severe effects like unconsciousness, dry skin and lack of sweating can be observed in the long run.

6.List the Difference Between Drip Irrigation and Sprinkler Irrigation?

• Both these types of irrigation are practised to minimise water loss during irrigation. The main differences are as follows:

Drip Irrigation	Sprinkler Irrigation
Water is supplied in the form of drops through porous water pipes.	Water is supplied which the help of sprinklers attached to the long pipes laid on the ground.
It is helpful for small vine or vegetable crops grown on a small land.	They are used for more giant farms.