[3 Marks Each] QUE-ANS

Question 13 Marks

How is proper disposal of garbage done by municipalities in cities?

Answer

Safal karamcharis collect the garbage from the city in trucks and take it to a low lying open area, called a landfill. There, the part of the garbage that can be reused is separated out from the one that cannot be used as such. The non-useful component is separated our. It is then spread over the landfill and then covered with a layer of soil. Once the landfill is completely full, it is usually converted into a park or a playground. For the next $20$ years or so, no building is constructed on it. To deal with some of the useful components of garbage, compost making areas are developed near the landfill. The recyclable garbage is sent to the recycling units where it is converted into compost or useful products.

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Question 23 Marks

What will you do to minimise the use of plastic?

Answer

We must take following precautions in mind to minimize the use of plastic:
$(1)$ We should carry cloth or jute bag for shopping.
$(2)$ If a broken plastic article can be repaired, then we should repair and use it.
$(3)$ We should reuse the bags whenever it is possible.
$(4)$ We insist shopkeepers to use paper bags instead of plastic bags.
$(5)$ We should make minimum use of plastic bags.

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Question 33 Marks

Where is plastic used?

Answer

$(1)$ Plastic is widely used in household items. e.g. toys, shoes, bags, pens, combs, tooth brushes, buckets, bottles and water pipes, etc.
$(2)$ Plastic is used as packing material and wrapper in majority of items nowadays. e.g. biscuits, chocolates, soap, talcum powder, wafers, milk, water, tea, etc.
$(3)$ Certain parts of automobiles and electronic equipments are made from plastic.
$(4)$ Plastic is replacing glass. e.g. tumbler, plates and bowls which were previously made from glass are made from plastic nowadays.
$(5)$ Previously furniture was made from wood, nowadays it is made from plastic.

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Question 43 Marks

What do you mean by garbage? Which substances are áonsidered as garbage?

Answer

The materials that are no more required and are of no use, that we throw out of our houses are collectively called garbage. Following substances are considered as garbage:
$(1)$ Kitchen waste like fruit and vegetable peels, their rotten parts, leftover food, egg shells, tea remains, etc.
$(2)$ Used plastic bags, wrappers, aluminium wrappers and foil, broken glass, old shoes, broken toys, metal waste, old clothes, etc.
$(3)$ Dry leaves, pieces of dried stalks of plants, husks, old newspapers, magazines, notebooks, pieces of paper, etc.

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Question 53 Marks

Collect different kinds of packaging material. What was the purpose for which each one was used? Discuss in groups.

Answer

Different kinds of packaging materials used commonly are:
$(1)$ Cardboard — used as shoe, soap, bulb and other boxes
$(2)$ Plastic bags — Toy covers, sarees bags, shopping bags, etc.
$(3)$ Wooden boxes — Fruit baskets and boxes for hardware
$(4)$ Jute bags - School bags, shopping bags, vegetable bags, etc.
$(5)$ Thermocol — Refrigerator, air conditioner, television, etc.
$(6)$ Wrappers, aluminium foils and colourful papers are also used for foods, gifts and decorations.

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Science [3 Marks Each] QUE-ANS

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