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16. Air Around Us, , Multiple Choice Questions (MCQs). Tick (“) the correct options. Page No. 195, 1. (a) 2. (b) 3. (b) 4. (b) 5. (d), Multiple Choice Questions (MCQs). Tick (“) the correct options. Page No. 197, 1. (a) 2. (b) 3. (a) 4. (c), SECTIONA, CLASS RESPONSE, A. Oral questions., 1. (i) Air occupies space. (ii) Air has no colour and smell., (iii) Airis present all aroundus. (iv) ~We-can feel air., 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, B. Science quiz., 1. Oxygen 2. Nitrogen 3. Gills 4. Stratosphere 5. Rainy season, WORKSHEET, A. Tick (/) the correct options., 1. (b) 2. (a) 3. (b) 4. (d) 5. (d)