Revision Test One Mark Test

9th Standard

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Science

Time : 00:45:00 Hrs
Total Marks : 40
    I. Choose the best answer :
    20 x 1 = 20
  1. Clouds float in atmosphere because of their low

    (a)

    density

    (b)

    pressure

    (c)

    velocity

    (d)

    mass

  2. In a pressure cooker, the food is cooked faster because

    (a)

    increased pressure lowers the boiling point

    (b)

    increased pressure raises the boiling point

    (c)

    decreased pressure raises the boiling point

    (d)

    increased pressure lowers the melting point

  3. Which of the following vibrates when a musical note is produced by the cymbals in a orchestra?

    (a)

    stretched strings

    (b)

    stretched membranes

    (c)

    air columns

    (d)

    metal plates

  4. If the speed of a wave is 340 m s-1 and its frequency is 1700 Hz, then wavelength λ for this wave in cm will be

    (a)

    34

    (b)

    20

    (c)

    15

    (d)

    0.2

  5. The maximum speed of vibrations which produces audible sound will be in

    (a)

    seawater

    (b)

    ground glass

    (c)

    dry air

    (d)

    Human blood

  6. When the pitch of note by a harmonium is lowered, then the wave length of the note

    (a)

    first decreases and then increases

    (b)

    decreases

    (c)

    remains the same

    (d)

    increases

  7. 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

  8. Who proposed the heliocentric model of the universe?

    (a)

    Tycho Brahe

    (b)

    Nicolaus Copernicus

    (c)

    Ptolemy

    (d)

    Archimedes

  9. Ceres is a _______.

    (a)

    Meteor

    (b)

    Star

    (c)

    Planet

    (d)

    Astroid

  10. Number of free electron(s) in each carbon of graphite is

    (a)

    one

    (b)

    Two

    (c)

    Three

    (d)

    Four

  11. Which of the following does not contain double bond

    (a)

    CO2

    (b)

    C2H4

    (c)

    HCl

    (d)

    O2

  12. Plastics made of Polycarbonate (PC) and Acrylonitrile Butadiene Styrene (ABS) are made of resin code ___________

    (a)

    2

    (b)

    5

    (c)

    6

    (d)

    7

  13. The lead pencil contains

    (a)

    Graphite

    (b)

    Diamond

    (c)

    Lead

    (d)

    Charcoal

  14. Plastic resin codes are shown as three chasing arrows in a ______________ with a number in the middle or letters (an acronym of that plastic type).

    (a)

    Logo

    (b)

    Recycling symbol

    (c)

    Square

    (d)

    Triangle

  15. The antibiotic Penicillin is obtained from ___________ 

    (a)

    plant

    (b)

    microorganism

    (c)

    animal

    (d)

    sunlight

  16. This type of food protect us from deficiency diseases.

    (a)

    Carbohydrates

    (b)

    Vitamins

    (c)

    Proteins

    (d)

    Fats

  17. The ice sheets from the north and south poles and the icecaps on the mountains, get converted into water vapour through the process of ______________.

    (a)

    evaporation

    (b)

    condensation

    (c)

    sublimation

    (d)

    infiltration

  18. The production and management of fish is called

    (a)

    Pisciculture

    (b)

    Sericulture

    (c)

    Aquaculture

    (d)

    Monoculture

  19. The symbiotic association of fungi and vascular plants is

    (a)

    Lichen

    (b)

    Rhizobium

    (c)

    Mycorhizae

    (d)

    Azotobacter

  20. The most fatal form of Malaria is caused by

    (a)

    Plasmodium ovale

    (b)

    Plasmodium falciparum

    (c)

    Plasmodium malariae

    (d)

    Plasmodium vivax

  21. II. Fill in the blanks 
    5 x 1 = 5
  22. The weight of the body immersed in a liquid appears to be_____________ than its actual weight.

    ()

    lesser

  23. A sound wave has a frequency of 4 k hz and wavelength 2 m. Then the velocity of sound is ____________ .

    ()

    800 m/s or 8000 rns-1

  24. The rotational period of the Sun near its poles is ________.

    ()

    About 36 days

  25. Different methods of formation of carbon is the main reason for its ____________.

    ()

    Allotropy

  26. Ganoderma lucidum, is commonly known as __________ mushroom.

    ()

    Lingzhi Mushroom

  27. III. True or False 
    10 x 1 = 10
  28. The weight of fluid displaced determines the buoyant force on an object.

    (a) True
    (b) False
  29. Hydraulic press is used in the extraction of oil from oil seeds.

    (a) True
    (b) False
  30. ISS is a proof for international cooperation.

    (a) True
    (b) False
  31. Satellites nearer to the Earth should have lesser orbital velocity.

    (a) True
    (b) False
  32. Poorly developed root is an adaptation of mesophytes.

    (a) True
    (b) False
  33. Aestivation is an adaptation to overcome cold condition.

    (a) True
    (b) False
  34. Anthraquinones is obtained from Ocimum sanctum.

    (a) True
    (b) False
  35. Ongole is an exotic breed of cattle.

    (a) True
    (b) False
  36. One of the differences between virus and viroid is the presence of protein coat in viroid and its absence in virus.

    (a) True
    (b) False
  37. The process of vaccination was developed by Jenner in the year 1796.

    (a) True
    (b) False
  38. IV. Abbreviate the following : 
    5 x 1 = 5
  39. ORS

  40. HIV

  41. DPT

  42. WHO

  43. BCG

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