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Class VI, Chapter 16: Garbage In, Garbage Out, Exercises, A. Tick (√) the correct options., 1. (d), , 2.(d), , 3.(b), , 4.(b), , 5.(d), , 6.(c), , 7. (b), , B. Fill in the blanks., 1. Garbage, , 2.Non-biodegradable, , 3. Recycling, , 4. Trees, , 5. Waste, , 6. Generation, , 7. Minimum, , 8. Earthworms, , C.Very Short Answer Questions., 1. Compost, 2. (a) Vegetable and fruit peels, , (b) Soapy water, , (c) Vehicular exhaust, , 3. One benefit of waste management is that it reduces air, water and land pollution., 4. Red worms, 5. in blue dustbin, non-biodegradable waste materials such as plastics, metals and glass are, collected., In green dustbin, biodegradable waste materials such as kitchen wastes and other plant and, animal wastes are collected., 6. Kitchen waste is a biodegradable material., , E.Short Answer Type Questions., 1. Wastes that can be decomposed by the action of microorganisms into simple and harmless, substances, so that they cannot harm the environment, are called biodegradable wastes. Peels, and cuttings of fruits and vegetables, animal dung, agricultural wastes are some examples of, biodegradable wastes., Wastes that cannot be decomposed by the action of microorganisms into harmless substances, are called non-biodegradable wastes. The objects made from plastic, glass and metals are, non-biodegradable wastes., 2. By recycling used paper, we can make new paper from old, used and discarded papers. This, can save many trees., 3. Making useful things from waste materials is called recycling. Materials like glass, metal,, plastic and paper are recycled to make fresh glass, metal, plastic and paper.
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4. Composting results in the production of natural fertiliser (compost) while burning of leaves, produces smoke and gases that are harmful for our health. That is why, composting is better, than burning leaves., 5.(a) Rohan gave his old bag to Radha because he was aware about the 4R principle., Accordingly, he wanted to reuse his bag., 5.(b) He is concerned about the environment., 6. Separation of biodegradable and non-biodegradable wastes is necessary because, biodegradable wastes are decomposed through composting and vermicomposting while nonbiodegradable wastes are disposed by other methods like incineration and recycling., F. Long Answer Questions., 1. Plastic is a boon because plastics have made our life easy and comfortable. Most of the, things we use in our daily life are made up of plastic. It will not be wrong to say that we live in, plastic age. Plastics are used in a wide range of products from paper clips to spaceships due to, their lightweight, relatively low cost and resistance to water and microorganisms. Plastics can, be given any colour and shape and they can be used for making a lot of objects. Plastics are, very durable. All this has made plastic a boon for us., 2. The methods of garbage disposal are—, (a) Composting, , (b) Landfill, , (c) Incineration, , Landfill: Landfill is a large, low-lying, open area outside the city or a town where the garbage, collected from a city or town is dumped. The garbage is spread out on the landfill and covered, with soil. Garbage buried in landfill stays in it for long time as it decomposes very slowly., When the landfill is completely filled, a park may be developed on it. The Indraprastha park in, Delhi is an example of a landfill park, , G.HOTS (Higher Order Thinking Skills) Questions., 1. Rag pickers are friends to society because they collect the wastes of our homes and dispose, them to proper places., 2. This is great because these type of activities reduce the wastes and make the environment, clean., , **********************
