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BULLET, ANGEL, L. no:3- Air, Water And Weat her, Hardwords:, 1) Temperature., 11) Decantation, 2) Air pressure., 12) Filtration, 3) Moisture., 13) Chlorination, 4) Atmosphere., 14) Disease, 5) Storm., 15) Residue, 6) breeze, 7) Evaporation, 8) Condensation, 9) Hailstone, 10) Sedimentation, A] Oral Questions:, Ans 1) Bigger water droplets f ormed in the clouds fall down as rain ., Ans 2) In rainy season, the air is humid, our sweat does not evaporate easily. Thus, we feel very sticky., B] Science Quiz:, Ans 1) Temperature, wind, air pressure, moisture and clouds., Ans 2) Land breeze., C] Tick (/) the correct options:, 1) Weat her, 2) Daytime, 3) Chlorine, D] Fill in the blanks with the help of the given words:, 1) Breeze, 2) Storm, 3) Humidity, 4) Chlorination, EJ Very Short Answer Questions:, Ans 1) Frost., Ans 2) Boiling., FJ Short Answer Questions :, Ans 1) When water vapour freezes in the air, it forms tiny flakes of ice called snow., Ans 2) The change of water into water vapour on heating is called evaporation., Ans 3) (a) Boiling and chlorination are two ot her process of purif ying water., (b) It is important to filter bad, inf luences in our lives to become a pure, positive and good human being., G] Long Answer Questions:, Ans 1) A coastal breeze blowing from the sea towards the land is called sea breeze. It occurs during the, day time. During the day. land gets heated quickly than the sea. Air above the land become hot and, lighter. It rises up and cool air from the sea rushes in to take it's place., On the ot her. a coastal breeze blowing from land towards the sea is called land breeze . It occurs at, night. At night, land cools down faster than the sea. The hot air above the sea rises up and cool air, from the land blows towards the sea to take it's place.

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BULLET, FINGEL, Ans 2) The sun heats the air near the land. The hot air spreads and become lighter. Light and hot air, rises up. Cool air flows down to take it's place. This moving air is called wind. In this way, the sun, causes the wind to blow., Think And Answer, Ansl) Snowfall occurs mainly in hill stations and not in plains because in hill stations the temperature is, very low., Ans 2) By boiling, Picture Talk:, Ansl) Purif ying water by filtration., Ans 2) (a) Residue - The impurities which get collected on the filter paper, (b) Filtrate - The clear liquid that, filters out in a seperate vessel.