Page 1 :
Multiple Choice Questions (MCQS). Tick () the correct options. Page No. 197, uftiple Choice Questions (MCQS). Tick () the correct options. Page No. 195, extensive damage to human life and property., geu under water during floods which causes, LaM, (d), ROSSWORD PUZZLE, Across ():, pper wires,, ited plastic-, Down ():, pper wires., he ends of, bare wires., ny, 1., Water, 1. Water table, 2. Steam, 3. Cholera, of, 4. Ice, to the cell., wire to the, ne negative, outting an, tion C and, 16. Air Arouhd Us, Choice Questions (MCQS). Tick () the correct options. Page No. 195, Warftiple, 2. (b), (Q), 3. (b), 4. (b), Choice Questions (MCQS). Tick () the correct options. Page No. 197, 5. (d), 1. (a), 2. (b), 3. (a), 4. (c), SECTION A, CLASS RESPONSE, A Oral questions., 1. (i) Air occupies space., (ii) Air has no colour and smell., (iv) We can feel air., (iii) Air is present all around us., 2. Nitrogen is needed by living organisms because it forms different body, components of living beings like proteins and nucleic acid., 3. (a) Respiration, burning, (b) Burning of fuels, respiration/air pollution/deforestation, bulb in, holder, B. Science quiz., 1. Oxygen 2. Nitrogen 3. Gills 4. Stratosphere 5. Rainy season, WORKSHEET, the bulb, ATick () the correct options., 1. (b) 2. (a), 4. (d), 5. (d), 3. (b), Teacher's Resource Pack SCIENCE-6, 62, Scanned by TapScanner, Scanned by TapScanner

Page 2 :
7, Circle the odd ones. Give reasons for your cholce., Reforestation- It is not a type of pollution, whereas others are the, types of pollution., Dust particles- This is not a gas, these are impurities, whereas the, others are gases., silt in the blanks,, atmosphere 2. wind 3. mixture 4. oxygen 5. carbon dioxide, SECTION B, A Multiple Choice Questions (MCQS) Scientific/Practical skills., 3. (b), 1. (b), Very Short Answer Questions,, 2. (d), 1. Oxygen, 3 Oxygen, nitrogen, carbon dioxide, noble gases and water vapour, 4. 0 Oxygen is a colourless, odourless and tasteless gas., (ii) Oxygen is soluble in water., S. Oxygen, 6 When we add water to the soil, the air bubbles come out. Bubbles, 2. around 300 km, ny, of, appear because water pushes the trapped air out of the spaces between, the particles of soil., 7 Oxygen, C Short Answer Questions., 1. (a) More water vapour, (b) Increased level of dust, smoke and gases especially higher amount, of carbon dioxide and oxides of nitrogen and sulphur., 2. The blanket of air that surrounds the Earth is called atmosphere. The, major components of air are nitrogen, oxygen, carbon dioxide and a few, other gases, water vapour, smoke and dust particles., 3. (a) The doctor provides extra oxygen to Priyanka's uncle by an oxygen, cylinder., (b) Care for others and taking quick decisions in case of emergency or, critical situation., 4. Nitrogen is needed by living organisms as it forms various components, of the body of living organisms like proteins and nucleic acids., 5. Air contains oxygen. If there is no air in water then aquatic plants will die, due to the absence of oxygen., 6. Air helps in maintaining proper temperature on the Earth. During the, day, when the Sun rays fall on the Earth, some of them get absorbed, by the atmosphere and rest are reflected back. This trapped heat, prevents Earth's atmosphere from too much cooling at night and helps, to maintain appropriate temperature., 63, Teacher's Resource Pack SCIENCE-6, Scanned by TapScanner, Scanned by TapScanner

Page 3 :
, The air around the glass with ice contains water vapour. The cold surface, of the glass containing ice cools the air around it and when the water, vapour of the air comes in contact with a cool surface it condenses on, the outer cool surface of the glass. This occurs due to condensation., Long Answer Questions., .Animals inhale oxygen from air and exhale carbon dioxide which goes into, the air. Burning of fuels uses oxygen from the air and gives out carbon, dioxide. Green plants use carbon dioxide from the air for photosynthesis, during the daytime and give out oxygen. The process of respiration in, plants takes place during day as well as at night. The oxygen released, during photosynthesis is more than the oxygen used in respiration., Therefore, there is a net release of oxYgen in the atmosphere. In the, above mentioned ways, plants and animals maintain the balance of, Oxvgen and carbon dioxide in the air and remains unchanged., D., 2 To show that air is dissolved in water, Things needed: A beaker, tripod stand, a burner, some water, Method: Take some water in a beaker and keep it on a tripod stand., Heat the water slowly by using a burner., Observation: You observe that, much before the water begins to boil,, tiny bubbles appear on the inner side of the beaker. These bubbles, come from the air dissolved in water, Actually, when water is heated,, the solubility of air in water decreases. As a result, the air dissolved in, water comes out in the form of tiny bubbles., When the dissolved gas is removed through heating and the same water, is heated again after a short interval of time, we do not observe bubbles., Conclusion: Air is dissolved in water., 3 (a) No, all organisms do not breathe through Ilungs. Most of the, terrestrial organisms breathe through lungs., (b), The aquatic organisms take the oxygen dissolved in water for, breathing., 4. The air is useful to us in many ways. The major uses are as follows-, (i), Oxygen is used by all living organisms for respiration., (ii) Oxygen is necessary for burning of fuels., (iii) Compressed air is used for inflating tyres of bicycles, scooters, cars, and buses. It is also used in balloons and footballs., (iv) Moving air has force. This force helps yachts (sailing boats),, parachutes and gliders to move., (v) Moving air (wind) is used to turn the blades of windmills., (vi) Wind helps in the dispersal of seeds of plants. It also helps in, pollination., Teacher's Resource Pack SCIENCE-6, 64, Scanned by TapScanner, Scanned by TapScanner

Page 4 :
HOTS (Higher Order Thinking Skill) Question:, We should breathe only through the nose because the fine hair and, mucus present inside the nose prevents dust particdes to enter our, lungs. If we breathe through mouth, harmful dust particles and germs, may enter our body and affect our health, 2. Some insects living in soil, come out of the soil only during heavy rain, 1., some insects living in soil, come out of the soil only during heavy rain, because rainwater fills up all the spaces occupied by the air in the soil, and no air is left in the soil for the insects to breathe., 1 Coastal areas are surrounded by sea and evaporation of sea water, increases the amount of water vapour in the atmosphere (humidity), and makes the weather more humid than the central region which is, away from the coast., 4. We can improve the air quality in our locality by the following methods:, (1) Planting more and more trees., (ii) Using catalytic converters and cleaner fuels like CNG in vehicles,, instead of petrol and diesel., (iii) Reducing the use of vehicles that run on petrol and diesel., (iv) Using pollution-free sources of energy such as tidal energy and, solar energy., (v) Walking and using rickshaw or bicycle, for shorter distances., (vi) Building tall chimneys in factories., 5. During the daytime, the rate of photosynthesis in plants is much more, than the rate of respiration. During the daytime, the carbon dioxide, produced during respiration is used by the plants for photosynthesis., Thus, carbon dioxide is not released in the environment. But at night,, there is no photosynthesis, only respiration takes place. At night carbon, dioxide is released by the plants. Thus, it is advised not to sleep under, the tree at night, because it can cause suffocation and breathlessness., Scanned by TapScanner