PIS BARODA STD-8

Answer Scheme

SCIENCE- WORLD OF ELEMENTS WORKBOOK

1.   The cells of cork are dead and have a chemical in their walls that makes them impervious to gases and water. The chemical is        (a)  lignin (b)  suberin (c)  cutin (d)  wax 2.   The flexibility in plants is due to a tissue called        (a)  chlorenchyma (b)  parenchyma (c)  sclerenchyma (d)  collenchyma 3.   The tissue present in the lining of kidney tubules and ducts of salivary glands is        (a)  squamous epithelium tissue (b)  glandular epithelium tissue        (c)  cuboidal epithelium tissue (d)  columar epithelium tissue 4.   The connective tissue that connects muscle to bone is called        (a)  ligament (b)  tendon (c)  nervous tissue (d)  all of the above 5.   The tissue that helps in the movement of our body are        (a)  musclar tissue (b)  skeletal tissue (c)  nervous tissue (d)  all of the above 6.   Sieve tubes and companion cells are present in        (a)  xylem (b)  phloem (c)  cork (d)  c

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CELLS – THE BUILDING BLOCK OF LIFE 1.   The power house of cell is called        a)  Cell wall        b)  Mitochondria        c)  Ribosomes        d)  Nucleus 2.   The kitchen of the cell is called        a)  Cell wall        b)  Nucleus        c)  Vacuoles        d)  Plastids 3.   The functional unit of life is called        a)  Cell        b)  Egg        c)  Nucleus        d)  None of these 4.   Chloroplast is found in        a)  Plant cell only        b)  Animal cell only        c)  Both of these        d)  None of these 5.   The control unit of cell is        a)  Nucleus        b)  Cell wall        c)  Cytoplasm        d)  All of these 6.   Single celled organisms are called        a)  Unicellular        b)  Multi-cellular        c)  Both of these        d)  None of these 7.   Tissue is a        a)  Group of organs        b)  Group of cells        c)  Group of tissues        d)  Group of organisms 8.   Cell

FUEL FIRE AND FLAME 1.    Which substance give heat and light after combustion         a. Flame         b. Fuel         c. Combustion         d. None of these 2.    Like fuel the sun also provides heat and light. The process taking place in the sun is called         a. Combustion         b. Nuclear process         c. Burning         d. All of these 3.    Coal burns with ______         a. Flame         b. Only glow         c. Both flame and glow         d. None of these 4.    Burning of charcoal in a closed room will produce         a. Carbon dioxide         b. Nitrogen dioxide         c. Carbon monoxide         d. All of these 5.    The substances which have very low ignition temperature will         a. Catch fire easily         b. Will not catch fire         c. Catch fire after some time         d. None of these 6.    CNG and LPG are the examples of         a. Solid fuels         b. Liquid fuels         c. Gaseous fuels   

MCQS TEST CLASS 8 LIFE UNDER MICROSCOPE 1.   Watering the crops is called:       (a)   sowing (b)   manuring (c)   tilling (d)   irrigation 1.   Spyrogyra is       I.     An algae       II.    A fungi       III.   A protozoa       IV.   A bacteria 2.   Vaccine for small pox is discorvered by       I.      Louis Pasteur       II.    Alexander Fleming       III.   Edward Jenner       IV.   John Mendal 3.   Amount of nitrogen in the atmosohere is       I.      58%       II.    68%       III.   78%       IV.   88% 4.   Mushroom belongs to       I.      Algae       II.    Virus       III.   Fungi       IV.   None of these 5.   Amoeba belongs to       I.      Algae       II.    Fungi       III.   Protozoa       IV.   Virus 6.   Scientist who discovered fermentation is       I.      Alexander Fleming       II.    Louis Pasteur       III.   John Mendal       IV.   Edward Jenner 7.   Rhizobium becteria       I.