Term 3 Summative Assessment Model 2019

9th Standard

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Science

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

    I. Choose the best answer 

    10 x 1 = 10
  1. The size of an air bubble rising up in water

    (a)

    decreases

    (b)

    increases

    (c)

    remains same

    (d)

    may increase or decrease

  2. Sound travels in air:

    (a)

    if there is no moisture in the atmosphere.

    (b)

    if particles of medium travel from one place to another.

    (c)

    if both particles as well as disturbance move from one place to another.

    (d)

    if disturbance moves.

  3. Ceres is a _______.

    (a)

    Meteor

    (b)

    Star

    (c)

    Planet

    (d)

    Astroid

  4. 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

  5. The lead pencil contains

    (a)

    Graphite

    (b)

    Diamond

    (c)

    Lead

    (d)

    Charcoal

  6. The age of a dead animal can be determined by using an isotope of ____________

    (a)

    carbon

    (b)

    iodine

    (c)

    phosphorous

    (d)

    oxygen

  7. Identify the incorrect statement with respect to adaptations of earthworm.

    (a)

    Earthworm has a stream lined body with no antennae or fins.

    (b)

    Each segment of earthworm has setae.

    (c)

    Many earthworms become inactive in a process called hibernation, during winter season.

    (d)

    Earthworms remain in its burrow during day time, to avoid sunlight.

  8. Mehsana is a breed of

    (a)

    Cow

    (b)

    Buffalo

    (c)

    Goat

    (d)

    Sheep

  9. The most fatal form of Malaria is caused by

    (a)

    Plasmodium ovale

    (b)

    Plasmodium falciparum

    (c)

    Plasmodium malariae

    (d)

    Plasmodium vivax

  10. Which of the following is correct?

    (a)

    Free and Open source

    (b)

    Free and Traditional software

    (c)

    Passive and Open source

    (d)

    Passive and Traditional source

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

    15 x 2 = 30
  12. Define orbital velocity.

  13. Define time period of a satellite.

  14. Which three resin codes are unsafe?

  15. What is Chemotherapy?

  16. Define Apiculture

  17. Define Vermiculture

  18. Differentiate Farmyard manure and Sheep manure

  19. Define the Vaccines

  20. Assertion: A sleeping mattress is so designed that when you lie on it, a large area of your body comes in its contact.
    Reason: This reduces the pressure on the body and sleeping becomes comfortable.
    (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. What is meant by atmospheric pressure?

  23. A block of wood of weight 200 g floats on the surface of water. If the volume of block is 300 cm3 calculate the upthrust due to water.

  24. Name the physical quantity whose SI unit is ‘hertz’. Define.

  25. A stone is dropped from the top of a tower 750 m high into a pond of water at the base of the tower. When is the splash heard at the top?
    (Given g = 10 m s–2 and speed of sound = 340 m s–1)

  26. What factors have made life on Earth possible?

  27. What are saturated and unsaturated compounds called?

  28. What is adaptation?

  29. How is division of labour observed in honey bees?

  30. Name the vector of the malarial parasite. Mention the species of malarial parasite which cause malignant and fatal malaria.

  31. III.Answer all in deatil

    4 x 5 = 20
  32. How does a fish manage to rise up and move down in water?

  33. Explain the working of human ear with diagram.

  34. Discuss the benefits of ISS.

  35. What are the chemical reactions of carbon? 

  36. Batteries that are used in mobile phone can be recharged. Likewise, can you recharge the batteries used in watches? Justify your answer.

  37. Describe the processes involved in the cyclic flow of water between biotic and abiotic factors of biosphere?

  38. What are the sources of organic resources for vermicomposting?

  39. Suggest the immunization schedule for a new born baby till 12 months of age. Why it is necessary to follow the schedule?

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