Science

Can you make something useful of these waste material?Powder containers, cold-drink cans, plastic bottles, shoe-box.

(a) Powder container: Their use depends upon their size, shape and the material they are made of. For example(i)elongated metallic powder container can be used as...

Municipality provides two types of dustbins for garbage collection. One coloured with blue colour and other with green colour. From following wastes which you will put in the which dustbin?Plastic materials, metals and glass items, wastes of plants and animals, peels of fruits and vegetables, dried leaves and twigs,...

(i) The material which can be recycled should be put in the blue dustbin. These materials are: plastic materials, waste metals and glass. It...

What can we do to reduce overuse of plastics?

Re-use of the plastic bags whenever it is possible to do so without any adverse affects. Neglect re-use of plastic bags for storage or...

Explain one way of recycling of waste paper.

One way to recycle the waste papers is as given below: Collect old newspapers, magazines, used notebooks, envelopes and tom out used papers. Make small pieces...

Observe the bins and waste material heaps and suggest what materials can be used for preparing handicrafts materials.

The following handicraft items can be prepared from the waste materials usually seen in bins and waste storage. Designs and sceneries on cardboard, pencil scrab...

List the steps for preparing vermicompost.

(i) Dig a pit about 30 cm deep or select a wooden box.(ii) Spread a net or chicken mesh at the bottom .of pit...

Why should we be careful in using plastic bags to store cooked food items?

(i) Sometimes the plastic bags may not be suitable for keeping eatables.Consuming food packed in such plastic bags could be harmful to our health.(ii)...

What suggestions you will give to members of locality to solve the problem of waste material?

I will suggest the member of my locality to use biodegradable waste in preparing compost.To take people in confidence, you should make efforts to...

What are the demerits of plastic?

Demerits of plastic:(i) Plastics give out harmful gases upon heating or burning. These gases may cause many health problems, including cancer in humans.(ii) Some...

What are the uses of plastic?

Uses:(i) Plastic container can be used to store edible goods.(ii) Goods packed in plastic pack can be taken anywhere easily and are water proof.(iii)...

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