Class 9 Term 3 SA Model Question

9th Standard

    Reg.No. :
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Science

Time : 02:30:00 Hrs
Total Marks : 60

    I. Choose the best answer 

    10 x 1 = 10
  1. An empty plastic bottle closed with an airtight stopper is pushed down into a bucket filled with water. As the bottle is pushed down, there is an increasing force on the bottom as shown in graph. This is because

    (a)

    more volume of liquid is dispaced

    (b)

    more weight of liquid is displaced

    (c)

    pressure increases with depth

    (d)

    all the above

  2. Which of the following can produce longitudinal waves as well as transverse waves under different conditions?

    (a)

    TV transmitter

    (b)

    tuning fork

    (c)

    water

    (d)

    slinky

  3. Which of the following statements is correct?
    A. There are eight planets in our Solar System.
    B. Except Mars, all other planets revolve around the Sun in elliptical orbits

    (a)

    A only

    (b)

    B only

    (c)

    Both A and B

    (d)

    None

  4. Which of the following does not contain double bond

    (a)

    CO2

    (b)

    C2H4

    (c)

    HCl

    (d)

    O2

  5. Which of the following plastic items are banned by the Government of Tamil Nadu as of 1st January 2019?

    (a)

    Plastic sheets

    (b)

    Plastic tea cups

    (c)

    Plastic water packets

    (d)

    All the above

  6. One Nanometre is

    (a)

    10-7 metre

    (b)

    10-8 metre

    (c)

    10-6 metre

    (d)

    10-9 metre

  7. Increased amount of ___________ in the atmosphere, results in greenhouse effect and global warming

    (a)

    carbon monoxide

    (b)

    sulphur dioxide

    (c)

    nitrogen dioxide

    (d)

    carbon dioxide

  8. Mehsana is a breed of

    (a)

    Cow

    (b)

    Buffalo

    (c)

    Goat

    (d)

    Sheep

  9. Syphilis is caused by

    (a)

    Treponema pallidum

    (b)

    Leptospira

    (c)

    Pasteurella

    (d)

    Vibrio cholerae

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

    (a)

    Windows

    (b)

    MAC OS

    (c)

    Adobe Photoshop

    (d)

    All the above

  11. II. Answer any 15 questions in the following :

    15 x 2 = 30
  12. What is solar system?

  13. Define orbital velocity.

  14. How many valence electrons are there in carbon?

  15. What is Forensic chemistry related to?

  16. Define 
    a. Pisiculture
    b. Apiculture
    c. Vermiculture
    d. Mariculture
    e. Floriculture
    f. Compost
    g. Pomiculture
    h. Pinning

  17. Define Compost

  18. Differentiate 
    a. Exotic breed and Indigenous breed
    b. Pollen and Nectar
    c. Shrimp and Prawn
    d. Fin fish and Shell fish
    e. Farmyard manure and Sheep manure

  19. Define the Plasmid

  20. Assertion: Pascal’s law is the working principle of a hydraulic lift.
    Reason: Pressure is thrust per unit area.
    (a) If both assertion and reason are true and reason is the correct explanation of assertion.
    (b) If both assertion and reason are true but reason is not the correct explanation of assertion.
    (c ) If assertion is true but reason is false.
    (d) If assertion is false but reason is true.

  21. Assertion: Wide wooden sleepers are kept below railway lines to reduce pressure on the railway tracks and prevent them from sinking in the ground.
    Reason: Pressure is directly proportional to the area in which it is acting.
    (a) If both assertion and reason are true and reason is the correct explanation of assertion.
    (b) If both assertion and reason are true but reason is not the correct explanation of assertion.
    (c) If assertion is true but reason is false.
    (d) If assertion is false but reason is true.

  22. Why does a helium balloon float in air?

  23. The density of water is 1 g cm–3. What is its density in S.I. units?

  24. Can sound travel through vacuum?

  25. You and your friend are on the moon. Will you be able to hear any sound produced by your friend?

  26. Write a note on the inner planets

  27. Carbon do not form ionic compounds. Why?

  28. What are the challenges faced by hydrophytes in their habitat?

  29. Why do we call Haryana and Kankrej breed of cattle as dual purpose breeds?

  30. A baby is suffering from diarrhoea, while other babies in the same locality do not. Mention the possible causes that you think. What would be the possible solutions for this?

  31. III.Answer all in deatil

    4 x 5 = 20
    1. How does an object’s density determine whether the object will sink or float in water?

    2. Explain how does SONAR work?

    1. Discuss the benefits of ISS.

    2. What is catenation? How does carbon form catenated compounds?

    1. The soil pH of a crop land is 5. What kind of fertilizers should be used in that land?

    2. What are the conditions in a dry habitat to which plants develop adaptations? List out the adaptations of xerophytes?

    1. Write short notes on;
      a) Importance of green houses
      b) Uzahavan mobile Application
      c) Major floriculture zones
      d) Azospirillum

    2. Name the causative agent of typhoid in human. How does the pathogen gain entry into the human body? Write the diagnostic symptoms and mention the organ that is affected in severe cases.

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