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1. I explain the people about the importance of using toilets. 

2. I shall emphasize how one is prone to get hookworm if goes for defecation in the open. 

3. Further such things lead to the contamination of air and water which causes a threat to the health of the people living nearby. 

4. If toilets are used the waste materials go deep into the earth and become soil in course of time without creating any problem. 

5. Defecation irt the open, attracts mosquitoes, house flies and other insects which inturn transmit diseases.

Toxins: A toxin is a poisonous substance produced within the organisms.

Juicy fruits: The fruits which contain water In them. Ex Watermelon, orange, grapes, mango etc.

correct option is B) Rains

We need water for domestic, agricultural and industrial purposes.

We get water from different water resources such as canals, tanks, ponds, rivers etc.

3/4th of the surface of the earth is occupied by water.

(a) Because only a small percentage is potable water fit for human consumption and household purposes. 

(b) Polluted water acts as a carrier for germs which causes various diseases. 

(c) Drip irrigation in agriculture utilizes supply of water in small quantities.

In villages wells, canals, tanks, ponds, rivers, etc. are the main water sources.

• If water is gently heated, it will become warm and vapour is produced. 
• If we heat more it .starts boiling and converts completely into water vapour. 
• The amount of heat absorbed by water affects its evaporation.
• If water is heated more, it will evaporate more.

Water is a polar covalent compound. When it comes in contact with any substance it breaks the electrostatic forces holding the molecules of that substance. Thus, the molecules break loose from the substance and hence dissolve in water. Thus, water is called a universal solvent and an alkali is not.

Water changes to ice at 0°C

Water (solvent).

(b) pressure is high

Correct option is A) Human faces

Correct option is A) manure

Correct option is C) Water

Correct option is C) water

Correct option is B) Organic Impurity
 

Correct option is B) Manure

1. If villagers take up the activity of sludge removal in tanks, more: water can be stored in them. Government should take up the renovation of lakes / tanks from time to time. 

2. Groundwater increases if checkdams are built over rivers, streams and riverets. This water can be used for all purposes. 

3. The rain water which flows from roof tops cap be diverted into a pit or a big Tank in the surroundings of the house, and this water can be used for few days.

Aeration allows the growth of microbes that break down wastes.

5 slogans on’Don’t waste water’. 

1. ’Water is our currency. Use it with care’ 

2. ‘Water is our life. Save it’. 

3. ‘Water is precious. Use it but donot throw it’. 

4. ‘Save water. Never become a partner for its shortage’. 

5. ‘Water is life. Life is not water’.

Chlorine kills harmful disease-causing organisms present in wastewater.

Physical, chemical, and biological processes are involved in the treatment of wastewater at the treatment plants.

Wastewater is treated in treatment plants.

The chemical formula of water is H₂O.

1. True.

2. False

Correct statement: Sea water is not suitable for irrigation as it has high salinity.

3. True

4. False

Correct statement: Water suitable for drinking is called potable water.

5. False 

Correct statement: Soap lathers well in soft water.

Groundwater is mainly used at our home and in our school. With the help of well, hand-pump, and machine groundwater is raised and through tap it is made available for use.

Water should be treated before being released to water bodies.

Septic tank: A type of tank used in houses for human excreta.

Waste water: Water not useful for drinking.

Many metals and their alloys are used to prepare utensils because they do not react with water under normal conditions.

When potassium is dipped in water forming respective hydroxides liberating hydrogen gas.

Hint: Draw diagram showing evaporation of water from sea, which form clouds in the sky. These clouds form rain. Rain water flows into lake or pond.

Water may be removed from the salt solution by heating it on a stove or keeping it in the sun in a plate for few hours.

In a Bisleri bottle.

Water is now sold under a new name, Mineral water.

It means water has no boundaries.

The weekly bath that the Dalits take.

The poet says that water is not a simple thing because while it can give life, it can also devour lives.

Water can ignite struggles and strife between village and Wada, between one state and another.

The poor are the playthings in the vicious hands of water.

(c)  The poor.

According to the speaker, water is a mighty movement because the denial of water to the Dalits became the cause of a historical struggle in Mumbai. In the Mahad municipality in Mumbai, even though the municipality had passed a resolution allowing the Dalit community access to the public tank, the local upper caste people prevented them from using the water. Subsequently, Dr Ambedkar went in a rally to the tank, drank a handful of water from the tank and asserted the right of the Dalits to use water from a public place like every other person in society.

The speaker talks about how water can be a source of retributive justice. The speaker declares that water is not a simple thing; it can give life but can also devour lives. She then declares in a vengeful tone that the water that could not serve to quench the thirst of the parched throats (of Dalits) became the killer tsunami wave and swallowed the whole village after village.

The speaker declares that ‘water’ is so powerful that it treats the ‘poor’ as its playthings. Sometimes, many villages suffer from drought and become dry deserts killing poor people. It may also come in the form of floods and drown them. Thus, the poet depicts the destructive nature of water.

Water is the elixir of life and without water, no life can exist on this earth. Naturally, water is a life-giver. When a panchama goes to a village tank and is made to wait for a pot of water all day long, one can imagine the misery and the hardships the Dalits have to suffer when they are denied a rightful share of water.

Like the panchama, the Wada girl is also made to face humiliation by being forced to collect the water dropped from above and getting drenched in the process. One has to imagine their need for water and the way it is given to them.

Similarly, water functions like a life-giver when we get to know that the Dalits face quite a few days without water even to quench their thirst. The speaker narrates one incident where water would have been a life-giver. In Malapalle, several thatched huts would have been saved if only there was one pot of water to douse the fire.