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s into Wquie ~ turn ty eee iy, * or, the ie, he freezel, eating is called melting,, , state on :, oe The process by which 4, , When we heat solid wax, it change, ice cubes or keep ice cubes out of t, , process by which a solid changes into liqul, , ; ‘ ; apour., When we heat water, it turns into water vap, , i 3 oration., liquid changes into gas on heating |S called evaP oc, they form water. The P, , d condensation., , ess by which a, , When water vapours cool down,, gas changes into liquid on cooling is calle, , Evaporation (Heating), , Melting (Heating), , , , , , Freezing (Cooling), , Water vapour, , , , CHANGE OF STATES OF WATER, Let’s Reeall, , Write T for true and F for false statements., , , , , , 4. Anything that has mass and takes up space is called matter., , . Water vapour changes into water on (freating) corona, , , , , , yay, . On(cooling, iid wax changes into liquid wax., , , , , , 2, 3, 4. Gases do not have fixed shape., 5., , . Liquids Gann} flow., , Solute, Solvent and Solution, Some solids like sugar and salt dissolve in liquids., , When we add salt to water, it becomes salty. When we add, sugar to milk, it becomes sweet., , The solid that dissolves in a liquid is called the solute. The, liquid in which a solute dissolves is called the solvent. For, oxample, when we dissolve sugar in milk, sugar is the solute, and milk is the solvent., , 28), , , , SUGAR DISS(, IN MILK

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fa, , THQ | Let's Answer, , A. Tick (“) the correct answer., , 1. What is present all around us?, , a. Solid b. Liquid \e-Matter d. Water, 2. All matter is made up of tiny particles called, , aT molecules b. gases c. solids d. solutes, 3. Which of the following has fixed shape and size?, , a. Air b. Water -e-Chair d. Milk, 4. Salty water is an example of, , a. solid b. solute c. solvent -d—solution, 5. When we heat solid wax, it turns into, , a. gas b. solution ecliquid d. ice, , B. Fill in the blanks with the correct words., , 1. Matter takes up Spal, (space/pace/mass) and has mass., Paper and stone are examples of asotid, (solid/liquid/gas)., , 2., —_, 3. There are thsee (three/four/two) states of matter., 4,, 5S., , us, In (solids/gases/liquids), molecules are very loosely packed., mi do not have a fixed shape. (shape/size/space). :, , Cc. Name the following., 1. Two examples of liquids. trate, ) milk. (answese vosuy-), . The liquid obtained when a solute dissolves in a solvent. Milas,, . The solute in a solution of salty water. alt, , 2, , 3, , 4. A state of matter which is usually hard. otra, , 5. A state of matter which does not have a fixed shape and size. ~, , >

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Are, , p. Answer the following questions., 1. What is matter? Name three states of matter,, , . Write three properties of solids,, , . Write the differences between Solids, liquids and gases., , What is solution? Give an example,, , . Differentiate between condensation and evaporation., , . How does matter change its state?, , Dun Fw np, , let's Do, , Le, ss, A. Match the things with the kind of arrangement of molecules they have. One has, , been done for you., , , , , 1. Air in a balloon . Air in a tyre, 3. Pencil . 4. Rock, 5. Water 6. ‘Eraser, , 7. Ink, , , , |, 9. Milk ; |

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iven below., B. Read the Clues and solve the crossword puzzle &, , 2., PoE &, oJ, ic ‘Moe [o ue Tse), Al ig |, , steele Al, felvlale ola la |r o|N, , “S 6, , , , ACROSS DOWN, 1. State of rock 1. Mixture of solute and solvent, 4. Changing of solid into liquid 2. Changing of liquid into solid, 5. Solid that dissolves in a solvent 3. State of water vapour, , 6. Changing of water into vapour, , BR 1 Let's Think and Answer (Gees Cay, , 1. Why does smell of a lig’, a up complete space), 2. Why read liquids flow, , (Hint: Arrangement of molecules in li, eee, , hee, , hted incense Stick spread quickly in a room? (Hint: Gase, , ae hake FIOM. incenae stick, t solids fle ie comely Space., , Bice he and Solids)

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=, , 7 Let's Acquire, , Razia left a glass of milk in the freezer overnight. In what ways Razia can convert, the milk into liquid form? \, , , , (a) By keeping the milk in freezer for 1 hour more., , , , , , (b) By keeping the milk out for some time., , (c) By adding salt to the milk. OQ, , , , , , (d) By keeping the glass inverted in freezer., , , , i,, i Let’s Enhance Our Life Swill, Collect different substances like sand, eraser, oil, chalk, honey, ink, turmeric powder,, washing powder, lime juice and milk. Check if these dissolve in water or not. Record, your observations in the form of table as shown below., , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , | Substances Dissolves Not dissolves, , 1. Sand x v, , 2. Eraser x “, 3. Oil x nal, 4. Chalk x —, 5. Honey — x, 6. Ink — x, 7. Turmeric powder ee x, 8. Washing powder — x, 9. Lime juice — x, , | 10. Milk - x