Class 6 Science Chapter 16 Important Questions

Class 6 Science Chapter 16 Important Questions of Garbage In, Garbage Out. All the extra important questions of class vi science chapter 16 are given here with suitable answers for the preparation of CBSE exams 2020-2021.

Students studying in state board can also use these important extra questions to understand the concepts of topics. All the contents are free to use without any login.

Class 6 Science Chapter 16 Important Questions for 2020-2021

Class: 6Science
Chapter: 16Garbage In, Garbage Out
Contents:Extra Important Question Answers

Class 6 Science Chapter 16 Important Extra Questions Answers

    • What do you mean by “Garbage”?
      Garbage is an unwanted or undesired material or substance. It is also referred to as rubbish, trash, waste or junk depending upon the type of material. Waste materials or rubbish especially household wastes, are called garbage. The peels of fruits and vegetables, leftover cooked food and fallen leaves of potted plants are thrown away as garbage.
    • Do you produce any garbage around yourself? How?
      We throw out so much rubbish or garbage every day from our homes, schools, shops and offices. The grains, pulses, biscuits, milk or oil purchased in shops, are packed in plastic bags or tins. All these wrapping materials go out as garbage. We sometimes buy things that are rarely used and often thrown into the garbage. Every time we throw away something, and we are producing garbage.

How would you deal with garbage?

The garbage collected in the dustbins in our homes, shops, offices and schools is taken away by sanitary staff or safai karmcharis of our area and put into big garbage dumps constructed by the municipality at various locations.
Safai karamcharis collect the garbage 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. Thus, the garbage has both useful and non- useful components. The non-useful component is separated out. 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.

    1. What will happen if garbage is not removed from our homes and surroundings regularly?
      If garbage is not removed from our homes and surroundings regularly, our homes and surroundings will become dirty. Some of the garbage (like a left-over food) will not giving off foul smell. The rotting garbage will become a breeding ground for disease causing organisms such as cockroaches, flies and mosquitoes. They will spread disease to us.
      Hence, it is necessary to remove garbage from our homes and surroundings regularly.
    2. What do you understand by the “segregation of garbage”?
      Sorting out the garbage in various groups is known as segregation of garbage.
    3. What do you mean by composting?
      The rotted plant and animal waste including that from kitchen used as a manure for growing plants is called compost. And the process of converting plant and animal waste material into manure by rotting is called composting. Generally, the biodegradable domestic garbage such as fruit and vegetable peels, left-over food and fallen leaves can be disposed of by converting it into compost which is used as a manure or fertilizers for growing plants. We have to remember that composed is a natural fertilizer, contains nutrients required for the growth of plants.
Write in your own words, what is composting? Do you think it is better to use compost instead of chemical fertilizers? Why?

Converting plant and animal waste into manure is called composting. Yes, it is better to use compost instead of chemical fertilizers due to the following reasons:

    1. Composed provides better and natural nutrients to the growing plants.
    2. It is better absorbed by the roots.
    3. It is cheaper than the chemical fertilizers.
    4. Chemical fertilizers do not get decomposed easily by natural methods thus, increase soil and water pollution.

    • Which kind of garbage is not converted into compost by the red worms?
      Non-biodegradable waste like pieces of synthetic cloth, polythene bags, broken glass, aluminum wrappers, nails and broken toys etc. cannot be converted into compost by the red worms.
    • “In some cities and towns municipalities provide separate dustbins for collecting two kinds of garbage” – Comment.
      In some cities and towns municipalities provide separate dustbins for collecting two kinds of garbage. Usually one is colored blue and the other green. The blue bin is for materials that can be used again — such as plastics, metals and glass. Generally, we noticed that these types of the materials do not rot in the garbage heaps. In the other hand, the green bins are for collecting kitchen and other plant or animal wastes. These types of wastes rot completely when buried in the soil. These, sorting out the garbage in various groups is known as segregation of garbage.
    • Beera, a farmer would clear his field every-day, and burn dry leaves fallen on the ground. After sometime he found that those living in huts near his field were suffering from cough and breathing problems. Can you explain, why?
      Fumes and gases produced by burning dry leaves caused cough and breathing problems for the people living in the nearby area.

Beautiful handcrafted articles like boxes and toys are made up of paper pulp in our country. Can you explain how paper pulp which is made from paper can be used to make hard boxes and other articles?
By following these simple steps, we can make hard boxes or other articles from the recycled paper pulp:

    • Step I: Create a stencil by unfolding a small, one-piece cardboard box and trace it on a piece of cardboard that is the same size as your mould. Then, cut out the shape with scissors.
    • Step II: Place the box stencil between your mould and deckle.
    • Step III: Raise the mould, deckle and stencil to the surface in one continuous motion and then remove them from the pulp.
    • Step IV: Remove the box from the stencil and let the paper dry.
    • Step V: Assemble the box by folding and gluing or taping the edges. Decorate it as your need.
    1. What is a landfill?
      A landfill is a site for the disposal of waste materials by burial and is the oldest form of waste treatment. It is a low-lying open area, in which non-useful garbage is dumped.
    2. How does the packaging increase the amount of garbage? Why should animal products not be used in vermi-composting?
      Plastic bags, cans, aluminium foils and many other package materials are used and thrown after used as garbage. Things like ghee, oil, soaps, cereals, snacks, even vegetables are available in smaller packets in which a lot of packaging material is used.
      Animal products should not be used in vermicomposting because if we put animal products and pickles, oil, vinegar etc. they enhance the growth of diseases causing bacteria which may cause the red worms to die.

Why should we not burn plastic items?

We should not burn plastic items because:

    • (i) They do not burn easily.
    • (ii) They produce toxic gases when burnt and left-over ashes are also toxic.
    • (iii) They add to soil pollution.
    • (iv) Burnt pieces may be eaten by cows which may choke them to death.
    • (v) Toxic gases lead to many respiratory diseases.
    1. Is it possible to reduce the problems relating to disposal of garbage?
      Yes, it is possible to reduce the problems relating to disposal of garbage to a large extent. We should use those material which are recyclable and avoid or reduce the use of non-biodegradable materials. While throwing out garbage in trash can, we should separate biodegradable waste from non-biodegradable and throw them in separate bins.
    2. Write short notes on “Redworms”.
      Red worms are a kind of earthworms. The redworms have a remarkable ability to convert plant matter such as fruit and vegetable peels leftover cooked food and green leaves etc. into a very high-quality manure called vermicompost.
      Redworms need food. You can give them vegetable and fruit wastes, coffee and tea remain and weeds from the fields or garden. Redworms do not have teeth. They have a structure called ‘gizzard’, which helps them in grinding their food. Powdered egg shells or sea shells could be mixed with the wastes. This would help redworms in grinding their food. A redworm can eat food equal to its own weight, in a day. Redworms do not survive in very hot or very cold surroundings. They also need moisture around them. If you take good care of your worms, in a month’s time their number will double.
What is biodegradable and non-biodegradable? Explain.

The part of garbage which cannot rot or decompose in nature or to form harmless substance is called biodegradable. All the garbage from plants (such as fruit and vegetable peels left over food, leaves, paper, cotton, jute etc.) and from animal (such as wool, silk leather and cow dung) is biodegradable. Biodegradable garbage is also known as organic waste
The part of garbage which does not rot or decompose in nature is called non-biodegradable. The garbage which consists of plastic, glass and metal object is non-biodegradable. Gold is a metal. And all garbage which is not derived from plants and animal sources is called non-biodegradable. Generally, biodegradable refers the decomposition of the wastage.

    1. Recently, a ban on plastic bags has been imposed in many places. Is the ban justified? Give reasons in three sentences.
      The recent ban on plastic bags is justified because:
      (i) The resources used to create the bags are scarce.
      (ii) They harm the environment when disposed-off improperly and also are visible blight of roadside litter.
      (iii) Cost of disposing or recycling them is high, as they are non-biodegradable.
    2. Write the main drawbacks of plastics.
      The drawbacks of plastics are as follows:
      (i) The major drawback of plastic is its non-degradable.
      (ii) Consuming food packet in plastic bags could be harmful to our health.
      (iii) All kinds of plastics give out harmful gases, on burning. These gases may cause many health problems, such as cancer, in humans.
      (iv) Some animals such as cows swallow plastic bags filled with garbage and they can die due to this.
      (v) The plastics also block the sewerage system and the drains as a result of which the water spills over the roads during rains.
Do you think it is better to use compost instead of chemical fertilizers? Why?

No, doubt compost is better to use than chemical fertilizers due to following reasons:

    • i) Compost is much easier to prepare.
    • ii) Compost is environment friendly whereas fertilizers can harm our health and the environment.
    • iii) Compost does not pollute our environment.
    • iv) Compost decomposes bio-degradable waste into natural soil. It conserves our environment.
    1. Is burning of leaves illegal in India? If not, should it be made illegal?
      No, burning of leaves is not illegal in India. It should be made illegal by government of India because it causes a lots of air pollution which is harmful to living organisms.
    2. Is garbage disposal the responsibility only the government?
      Garbage disposal is the responsibility of every citizen. If we continue to generate so much garbage, the spreading disease will increase at large scale. Non-biodegradable waste like plastic, polybags also add harmful factors to environment. We must ensure ways to reduce generation of garbage. Wherever possible, we must use recyclable material in our daily use.
Have a discussion about the uses and harmful effects of plastic in our daily lives.

Uses of plastic:
a) Plastic goods like container, boxes, jars etc. are used for keeping edible goods. They do not spoil.
b) The goods in plastic pack can be carried anywhere easily.
c) Plastic boxes are light in weight, good looking, cheap and best and durable.
d) No chemical effects on it.
Demerits of plastic:
a)Plastic bags do not decompose in soil and cause decreasing the power of fertility.
b)Most of the people fill, the peelings and rotten fruits and vegetables in plastic bags.
They grow them on roads, in drains or in fixed dustbin from where cattle like cows, dogs, pigs, bulls etc., eat them with plastic bags. These bags are not digested by the animals and they suffer from diseases.

If you and your friends are given the choice of eating in a plastic plate or a banana leaf platter at a party which one would you prefer and why?

Banana leaf is a better choice; it is biodegradable and can be disposed easily. On the other hand, eating in plastic plate is not good as plastic is non-biodegradable, it will not disposed-off easily.

What can we do to minimize over use of plastics?

We make a minimum use of plastic bags. We re-use the bags whenever it is possible to do so without any adverse effects. We insist shopkeepers use paper bags. We carry a cloth or a jute bag when we go out for shopping. We do not use plastic bags to store eatables. We do not throw plastic bags here and there, after use. We never burn plastic bags and other plastic items. We do not put garbage in plastic bags and throw it away. We use vermicomposting at home and deal with our kitchen waste usefully. We recycle paper. We use both sides of the paper to write. We use a slate for rough work. We use blank sheets of paper left in our notebooks for rough work. We make our family, friends and others to follow proper practices for disposing different kinds of wastes.