Our Environment- Assignment

Chapter: Our Environment

Home Assignment

 Section A Multiple Choice Questions (MCQs)

 1. Which one of the following is an artificial ecosystem?

 (i) Pond      (b) Crop field        (c) Lake      (d) Forest

 2. In a food chain, the third trophic level is always occupied by

 (a) carnivores      (b) herbivores     (c) decomposers        (d) producers

 3. An ecosystem includes
(a) all living organisms
(b) non-living organisms
(c) both living and non-living objects.
(d) sometimes living organisms and sometimes non-living objects.

 4. excessive exposure of human to UV- rays results in
(a) damage to immune system
(b) damage to lungs
(c) skin cancer
(d) peptic ulcers

 5. In the following groups, of materials, which group contains only non-biodegradable items?
(a) wood, paper, leather
(b) Polythene, detergents, PVC
(c) Plastic, detergents, grass
(d) Plastic , bakelite, DDT

 Section B Answer the following questions

 1. Why is improper disposal of waste a curse to environment?

 2. Write the common food chain of pond ecosystem.

 3.  List any two advantages of cloth bags over plastic bags during shopping.

 4. Differentiate between biodegradable and non-degradable substances. Give example.

 5. Explain the role of decomposers in the environment.

 6. Indicate the flow of energy in an ecosystem. Why is it unidirectional?

 7.Give any two difference between food chain and food web.

 8. What are the by-product of fertiliser industries?  How do they effect the environment?

 9. Explain the harmful effects of agriculture practice on the environment.

 10. List any four types of wastes generated from our home. What measures would you take for their disposal?

Comments

  1. Shourya GuptaMay 5, 2020 at 10:34 AM

    10-D

    ReplyDelete
  2. Bennett JoyMay 5, 2020 at 10:38 AM

    Good morning sir
    Bennett Joy

    ReplyDelete
  3. Shourya GuptaMay 5, 2020 at 10:38 AM

    1(B), 2(A), 3(C), 4(C), 5(D)

    ReplyDelete
  4. Ojas GirotraMay 5, 2020 at 10:39 AM

    Good Morning Sir
    -Ojas Girotra

    ReplyDelete
  5. SiddharthMay 5, 2020 at 10:40 AM

    Good morning sir
    Siddharth kushwaha

    ReplyDelete
  6. Shaurya ShilMay 5, 2020 at 10:40 AM

    Good morning sir
    Shaurya Shil

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  7. Aaron GariMay 5, 2020 at 10:40 AM

    PRESENT

    ReplyDelete
  8. UnknownMay 5, 2020 at 10:41 AM

    Good morning ma'am
    Divij Gogia

    ReplyDelete
  9. Adavya DhirMay 5, 2020 at 10:42 AM

    Good morning Sir
    Adavya Dhir

    ReplyDelete
  10. Aryan AnandMay 5, 2020 at 10:42 AM

    Good morning sir
    Aryan Anand

    ReplyDelete
  11. Anshumaan SinghMay 5, 2020 at 10:43 AM

    good morning sir

    ReplyDelete
  12. Elizabeth RejiMay 5, 2020 at 10:43 AM

    Good morning sir
    Joel Reji

    ReplyDelete
  13. Eugene SamuelMay 5, 2020 at 10:44 AM

    Good morning sir
    Eugene Samuel

    ReplyDelete
  14. SIDH CHICHRAMay 5, 2020 at 10:44 AM

    Good morning sir
    Sidh chichra

    ReplyDelete
  15. ARYA VEER TANEJAMay 5, 2020 at 10:45 AM

    Good morning sir
    Arya Veer taneja

    ReplyDelete
  16. Harsh vardhanMay 5, 2020 at 10:46 AM

    Good morning sir
    Harsh Vardhan

    ReplyDelete
  17. Rachit chugMay 5, 2020 at 10:46 AM

    good morning sir

    ReplyDelete
  18. KENNARD RENCE WILLIAM 10-DMay 5, 2020 at 10:47 AM

    Good morning sir
    Kennard Rence William

    ReplyDelete
  19. emmanuel gomesMay 5, 2020 at 10:50 AM

    Good morning sir
    Emmanuel GOMES

    ReplyDelete
  20. Pratham ChhabraMay 5, 2020 at 10:52 AM

    PRESENT

    ReplyDelete
  21. Shreyas shankerMay 5, 2020 at 10:53 AM

    Good morning sir

    ReplyDelete
  22. Syed Sarim HasanMay 5, 2020 at 10:53 AM

    Good morning sir
    Sarim Hasan

    ReplyDelete
  23. Tuan Muan LalMay 5, 2020 at 10:54 AM

    Good morning sir
    Tuan Muan Lal

    ReplyDelete
  24. Arvind GoyalMay 5, 2020 at 11:06 AM

    Good morning sir Arvind Goyal

    ReplyDelete
  25. Aryan VermaMay 5, 2020 at 11:11 AM

    Good morning sir

    ReplyDelete
  26. Sahej Grover May 5, 2020 at 11:24 AM

    Good morning sir

    ReplyDelete
  27. UnknownMay 5, 2020 at 11:29 AM

    Ayaan Edward here

    ReplyDelete
  28. Jatin JamesMay 5, 2020 at 12:19 PM

    Good afternoon sir
    Jatin James

    ReplyDelete
  29. Johnson joshuaMay 5, 2020 at 12:21 PM

    Good morning ma'am

    ReplyDelete
  30. Swyam kapoorMay 5, 2020 at 1:12 PM

    Good afternoon sir

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  31. Shaurya NarangMay 5, 2020 at 2:24 PM

    Good afternoon sir,
    Shaurya Narang

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  32. Akshat ChadhaMay 5, 2020 at 4:07 PM

    Good afternoon sir
    Akshat Chadha

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  33. JapmannMay 5, 2020 at 4:09 PM

    Good afternoon sir
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  34. Talha AnsariMay 5, 2020 at 4:12 PM

    Good Afternoon Sir
    Talha Ansari

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  35. Kshitij JainMay 5, 2020 at 6:18 PM

    Good evening sir
    Kshitij Jain

    ReplyDelete

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