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2. Disposal of non-biodegradable wastes is a big problem because this, type of waste does not rot or decay., , 3. Composting is the best way to dispose of leftover food cooked at home., Vermicompostingis betterthan composting because in vermicomposting,, the composting occurs very fast with the help of redworms., , B. Science quiz., 1. Vehicular exhaust, burning of coal/smoke from factories and industries, 2. Biodegradable waste- peels and cuttings of fruit and vegetables, animal, dung/leaves/bones/leftover food/plant residues, Non-biodegradable waste- plastic objects, broken glass pieces/iron, nails/metallic utensils, 3. Plastic objects and used paper/glass containers/metal objects, 4. Compost, WORKSHEET, A. Tick (W) the correct options., 1. (d) 2. (d) 3. (b) 4. (b) 5. (d), B. Fill in the blanks., 1. garbage 2. composting, 3. non-biodegradable 4. non-biodegradable, 5. Compost 6. waste, SECTION B, A. Multiple Choice Questions (MCQs) Scientific/Practical skills., 1. (a) 2. (b) 3. (c), B. Very Short Answer Questions., , 1. Compost, 2. (a) Fruit and vegetable peels, (b) Water containing detergent, (c) Smoke released by vehicles, 3. (i) It reduces air, water and land pollution., (ii) It provides healthy and clean environment., (iii) It conserves the natural resources., (iv) It saves money., Redworms are used for vermicomposting., 5. The blue dustbin is used for collecting non-biodegradable wastes E.g.,, plastic or metal objects., The green dustbin is used for collecting biodegradable wastes. E.g., fruit, and vegetable peels, leftover food