3rd Term Science Complete Study Material

6th Standard

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Science

Time : 02:15:00 Hrs
Total Marks : 60

    I. Choose the best answer

    10 x 1 = 10
  1. People who made mariner’s compass for the fi rst time.

    (a)

    Indians

    (b)

    Europeans

    (c)

    Chinese

    (d)

    Egyptians

  2. Around 97% of water available on earth_________ is water

    (a)

    fresh

    (b)

    pure

    (c)

    salty

    (d)

    polluted

  3. Which of the following processes add water vapour to the atmosphere?
    i. Transpiration ii. Precipitation iii. Condensation iv. Evaporation

    (a)

    ii and iii

    (b)

    ii and iv

    (c)

    i and iv

    (d)

    i and ii

  4. Soaps were originally made from________.

    (a)

    proteins

    (b)

    animal fats and vegetable oils

    (c)

    chemicals extracted from the soil

    (d)

    foam booster

  5. Producers are________

    (a)

    Animals

    (b)

    Birds

    (c)

    Plants

    (d)

    Snakes

  6. Usage of chemical pesticides and fertilisers causes ________ pollution.

    (a)

    Air pollution

    (b)

    Water pollution

    (c)

    Noise pollution

    (d)

    None of the above

  7. Natural Mosquito repellant is

    (a)

    Nutmag

    (b)

    Bamboo

    (c)

    Ginger

    (d)

    Neem

  8. Which is the national tree of India?

    (a)

    Neem tree

    (b)

    Jack tree

    (c)

    Banyan tree

    (d)

    Mango tree

  9. LINUX is a

    (a)

    Paid Software

    (b)

    Licensed Software

    (c)

    Free and Proprietary software

    (d)

    Free and Open source software

  10. Find out Paid and Proprietary software from the given list

    (a)

    Windows

    (b)

    MAC OS

    (c)

    Adobe Photoshop

    (d)

    All the above

  11. II. Fill in the blanks

    5 x 1 = 5
  12. Artifi cial magnets are made in different shapes such as __________, __________ and ____________.

    ()

    oval, cylindrical, disc

  13. Only _______ percent of natural water is available for human consumption.

    ()

    3

  14. ___________ fertilizer is ecofriendly

    ()

    Organic

  15. __________ is the process of converting waste materials into new materials.

    ()

    Recycling

  16. I am the state tree of Tamilnadu . Who am I____________?

    ()

    Palm tree

  17. III. Match the following

    5 x 1 = 5
  18. Cloud

  19. (1)

    Paid and Proprietary Software

  20. Cement

  21. (2)

    RCC

  22. Phenol

  23. (3)

    Water vapour

  24. MAC OS

  25. (4)

    RAM

  26. Hardware

  27. (5)

    C6H5 OH

    IV. Answer any 10 in the following :

    10 x 2 = 20
  28. Take out of cooled bottle of water from refrigerator and keep it on a table. After some time you notice a puddle of water around it. Why?

  29. What are the three main constituents of soap?

  30. What are the types of pollution.

  31. Name some pollutants.

  32. What are medicinal plants?

  33. Take a glass of water with a few pins inside. How will you take out the pins without dipping your hands into water?

  34. Differentiate between surface water and ground water.

  35. About 71% of earth’s surface is covered with water, then why do we face scarcity of water?

  36. Why earthworm is called as farmer’s friend?

  37. Explain the link between waste and dangerous diseases like dengue and malaria?

  38. Kavitha said “ Palm tree is a tall tree, so it gives hard wood”! Do you agree with her statement or not ? Explain Why?

  39. What is Hardware and Software?

  40. V. Answer any four questions

    4 x 5 = 20
  41. You are provided with an iron needle. How will you magnetize it?

  42. What is potable water? List down its characteristics

  43. Who is known as waterman of India? Browse the net and find the details about the award, the waterman received for water management. State the findings by drafting a report.

  44. How are detergents manufactured?

  45. Write a short note on noise pollution.

  46. Write short notes on – Timber yielding plants.

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