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Subject:

science-chemistry

Class:

class VI

Key Concepts

waste, garbage, landfill, compost, vermicomposting, recycling

essential questions

1. Where and how do we dispose of collected waste?
2. How do you handle different forms of waste?
3. Why is important to segregate garbage?

Remembering:

  1. Define landfill.
  2. List some of the ways in which we can reduce garbage?
  3. Give examples of material that can be used again.
  4. We find two different colored bins for collection of garbage. These dustbins are usually of which of the following two color: a) green and yellow  b) green and red  c) blue and red  d) blue and green
  5. What kind of materials are to be collected in blue colored bins: a) plastics  b) metals  c) glass  d) materials that can be used again
  6. The organisms that are used for vermicomposting are: a) type of earthworm  b) redworm  c)  both a and b  d) none of the above

understanding:

  1. What is composting?
  2. Why is important to recycle waste?
  3. How can we reuse plastic?
  4. List waste products produced from an industry.
  5. What is Swach Bharat Abhiyan. Write a short note on it.
  6. What type of garbage is thrown in green bins?
  7. Write the process of recycling paper in detail.
  8. What do we do to the useful components (biodegradable) of the garbage?
  9. Landfill is a : a) low lying open area   b) low lying open area, where the garbage collected from a city or town is dumped   c) place where truck loads of garbage are dumped  d) all of the above are correct
  10. How is garbage handled at the landfill site: a) spread as such over the landfill site   b) separated into useful and non useful components and then spread over the landfill site  c) both a and b are correct   d) none of the above
  11. The rotting and conversion of some materials into manure is called: a) fertilization  b) utilization  c) composting d)  none of these
  12. There are two types of dustbins for garbage collection. One colored with blue color and other with green color. From the 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 vegetable, dried leaves and twigs, remains of meat like flesh and hopes

Application:

  1. How do redworms digest the food they eat?
  2. When making a vermicomposting mix why is it said to add egg shells in the waste?
  3. We should not add wastes containing salts, pickles oil, vinegar, meat and milk products in vermicomposting pit to feed redworms. Why?
  4. Why should we be careful in using plastic bags to store cooked food items?

Analysis:

  1. Do you think it is better to use compost instead of chemical fertilizers? Why?
  2. Is plastic a boon or a bane or is it both? Give reasons to justify your argument.
  3. Why should we not burn dried plant leaves and husk? What is the best way to get rid of them?
  4. What will happen if garbage is left open in bin?
  5. What suggestion you will give to members of locality to solve the problem of waste material?

Examine the two statements carefully and decide if the Assertion A and reason R are individually true and if so whether the reason is correct explanation of the assertion. Select your answer to these items using codes given below.

  1. Assertion (A): Garbage contains plastics, metal containers and other wrapping materials  Reason (R): Useful and non useful components are separated out from the garbage at landfill site after spreading the garbage over landfill site. a) both A and R are true and R is the correct explanation of A  b) both A and R are true but R is not the correct explanation of A  c) A is true but R is false  d) A is false but R is true
  2. Assertion (A): After landfill site is completely filled with garbage it is converted into a park   Reason (R): At a landfill site that has been converted into a park, no building is allowed to be constructed for next 50 years   a) both A and R are true and R is the correct explanation of A  b) both A and R are true but R is not the correct explanation of A  c) A is true but R is false  d) A is false but R is true
  3. Assertion (A): We develop some compost making areas near the landfill. Reason (R): It s done to utilize some of the useful components of garbage. a) both A and R are true and R is the correct explanation of A  b) both A and R are true but R is not the correct explanation of A  c) A is true but R is false  d) A is false but R is true
  4. Assertion (A): You are advised never to burn the dry leaves. Reason (R): They produce harmful gases when burnt. a) both A and R are true and R is the correct explanation of A  b) both A and R are true but R is not the correct explanation of A  c) A is true but R is false  d) A is false but R is true
  5. Assertion (A): Vermicomposting is done with the help of blue worms  Reason (R): We can recycle paper to get useful products a) both A and R are true and R is the correct explanation of A  b) both A and R are true but R is not the correct explanation of A  c) A is true but R is false  d) A is false but R is true

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