Sand & windmill

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PPT on sand & windmill , gr-5 sci exhibition

Transcript of Sand & windmill

  • 1. Sand & Windmill By : Abhiram& Sanjana

2. SandA loose granular substance, typically paleyellowish brown, resulting from the erosion ofsiliceous and other rocks and forming a majorconstituent of beaches, riverbeds, theseabed, and deserts. 3. How is sand formedSand is a sedimentary material loose grains ofworn out and disintegrated rocks. Sand is anaturally occurring fragmented materialcomprised of tiny particles of decomposedrocks, shells, or corals, but there are alsounnatural ways to form sand. 4. Types of SandGlass SandGypsum Sand Garnet SandVolcanic SandOlivine SandDesert Sand 5. Uses of sandConstructionLeisure And Sport Water Filtration Pottery 6. Things made up of Sand Glass Sand paper Hourglass 7. Animals living on Sand There some animals they are as follows: Ant Arabian Camel Bighorn Sheep Bandicoot Great Horned Owl Eagle 8. Plants living on Sand Many plants are found in the desert. They usually grow to the ground These plants have special parts that help themsave water. 9. Life on sandThere is not much crops in desert to grow butmany people live there. They move theiranimals and belonging from place to place insearch of water and plants. These men arecrossing from the Syrian desert to Middle East.They are wearing long, loose clothes toprotect themselves from the heat of the sand. 10. Desert The desert is the land of extreme heat and dryness with cold nights. Desert are difficult place to live in. They often have names like: THE DEATH VALLEY THE EMPTY QUARTER 11. Top 5 Deserts in worldThe top 5 desert in the world are: Sahara Desert Gobi Desert Gibson Desert Thar Desert Kalahari Desert 12. Kinds of Deserts Hot The summers are very hot. The temperature are very warm all year round.Desert Short ,warm summers & ColdLong, cold winter. Found in places near northDesert and south pole. 13. OasisAn oasis is the only place where water isfound in a desert. Water collects in hollowsworn out by the wind. It may come fromdesert storms or from rain that falls onmountains on the edge of the desert.Rainwater drains through rocks deep underthe desert and collects at an oasis. 14. Sand DunesThe shape of a sand dune depends on the waythe wind is blowing :When the wind blows from onedirection, curved dunes, calledbarchans, formed. wind direction 15. Climate There are 2 types of climate Hot and Dry. In the summer during daytime thetemperature of the Sahara Desert often goesto over 100 degrees Fahrenheit. The hottest temperature, meteorologists haverecorded 136 degrees at Azizia, Libya onSeptember 13,1922 The desert receives less than 25 centimetersof rain each year. 16. Sandstorm Violent wind forms the sandstorms. Sandstorms can last to many days & hours. Sandstorms may cause dehydration & suffocation of animals and humans.Camels are the only one to survive in sandstorm 17. Windmill Windmills are goods for the environmentbecause no harmful solids, liquid or gases areproduce. No need of any fuel or toxic waste is needed. Wind energy is used to generate electricity byusing wind turbines. 18. How does a wind turbine works The blades catch the wind and turn the rotor which they are joined to.The rotor is connected to the nacelle which houses all the working for the turbine.The rotor turns a shaft which is connected to a set of cogs called a gear box.The gear box is connected to a generator which makes electricity when it turns. 19. Facts on sand The tallest sand dune is ISANOE-n-TIFERNE. Deserts cover about one-third of the earthland-surface. The actacania desert in South America had norain for 400 years. 20. Ms Deepa What is sand ?Ans: Sand is tiny particles of rocks. How is sand used in our daily life ?Ans: Lamps, Play ground, Bricks, Replace soil, Construction. How is sand connected with desert ?Ans: In the desert area there is a vast accumulation of sand. Sand is a loose so difficult to cross. Can you say anything interesting thing about sand ?Ans: The sand dunes 21. Ms Madhu What is sand ?Ans: Dried land where soil is totally gone. How is sand used in our daily life ?Ans: Construction, Pottery, Cooking Utensils, Pots, ReducesGlobal Warming. How is sand connected with desert ?Ans: It is fully of sand. Very little of water. Can you say anything interesting on sand ?Ans: Water Filtration 22. ThanksgivingWe both thank our:Our dear principal Sir A.P. Singh Ms Precy Ms Rachna Sir Danny Ms NirupamaOur Mentor Sir Manoranjan Parents Ms Deepa & Ms Madhu 23. Bibliography Children encyclopedia Earth Incredible earth Googleimages 24. The end Thank you for coming toour exhibition.By Sanjana and Abhiram