7th Class Science Sample Paper

done Science Olympiad Model Test Paper-7 Total Questions - 40    [Download]

• question_answer1)
  In the autotrophic mode of nutrition:
  A)
  food is prepared from simple inorganic substances   by   the   process   of photosynthesis
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  B)
  food is obtained from dead and decaying organic substances
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  C)
  food is obtained from green plants
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  D)
  food is obtained from the host
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  E)
  None of these
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• question_answer2)
  Non-renewable resources:
  A)
  can never be replaced once they get used up
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  B)
  can be replaced but the time varies from few hundred to million of years
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  C)
  can be replaced in 10 to 20 years
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  D)
  can be replaced in 20 to 50 years
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  E)
  None of these
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• question_answer3)
  Find the odd one from the following.
  A)
  Ingestion
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  B)
  Absorption
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  C)
  Assimilation
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  D)
  Excretion
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  E)
  None of these
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• question_answer4)
  Find the odd one from the following.
  A)
  Conduction
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  B)
  Convection
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  C)
  Evaporation
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  D)
  Radiation
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  E)
  None of these
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• question_answer5)
  A rare and expensive fibre called cashmere is obtained from:
  A)
  camel
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  B)
  goat
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  C)
  rabbit
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  D)
  sheep
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  E)
  None of these
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• question_answer6)
  The process of taking out silk fibres from the cocoons for use as silk is called:
  A)
  reeling
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  B)
  shearing
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  C)
  scouring
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  D)
  rearing
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  E)
  None of these
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• question_answer7)
  Which among the following is the best conductor of heat?
  A)
  Aluminium
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  B)
  Water
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  C)
  Air
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  D)
  Wood
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  E)
  None of these
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• question_answer8)
  Organisms, which live in or near the host and obtain their nutrition from the host, are called:
  A)
  autotrophs
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  B)
  heterotrophs
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  C)
  parasites
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  D)
  saprophytes
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  E)
  None of these
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• question_answer9)
  During digestion, proteins are changed into:
  A)
  fatty acids
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  B)
  glucose
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  C)
  sugar
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  D)
  amino acids
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  E)
  None of these
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• question_answer10)
  What does F represent in the following figure?
  A)
  Optical centre of the lens
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  B)
  Centre of curvature
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  C)
  Radius of curvature
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  D)
  Focus
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  E)
  None of these
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• question_answer11)
  Which one of the following type of medium is required in the stomach for the proper action of digestive juices on proteins?
  A)
  Acidic
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  B)
  Basic
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  C)
  Neutral
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  D)
  All of these
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  E)
  None of these
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• question_answer12)
  Which one of the following will expand the most on heating?
  A)
  Water
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  B)
  Air
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  C)
  Iron
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  D)
  Silver
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  E)
  None of these
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• question_answer13)
  A car travels 30 km in 20 minutes. What is the speed of the car?
  A)
  50 km/h
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  B)
  70 km/h
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  C)
  80 km/h
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  D)
  110 km/h
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  E)
  None of these
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• question_answer14)
  A \[15{}^\circ C\] increase in temperature is equal to:
  A)
  \[32{}^\circ F\] fall in temperature
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  B)
  \[32{}^\circ F\] increase in temperature
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  C)
  \[27{}^\circ F\] fall in temperature
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  D)
  \[27{}^\circ F\] increase in temperature
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  E)
  None of these
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• question_answer15)
  Which one of the following statements is correct about acids?
  A)
  Acids are corrosive in nature
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  B)
  Acids are not soluble in water
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  C)
  Acidic solutions do not conduct electricity
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  D)
  Acids do not corrode aluminium and iron     
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  E)
  None of these
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• question_answer16)
  Which one of the following natural phenomena involving high speed wind?
  A)
  Cyclone
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  B)
  Earthquake
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  C)
  Tornado
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  D)
  Both (B) and (c)
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  E)
  None of these
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• question_answer17)
  Potassium hydroxide will turn:
  A)
  blue litmus to red
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  B)
  china rose indicator to magenta              
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  C)
  turmeric paper to yellow
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  D)
  phenolphthalein indicator to pink           
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  E)
  None of these                             
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• question_answer18)
  Water logging can be expected in soil which is rich in:
  A)
  Sand
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  B)
  Clay
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  C)
  Silt
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  D)
  Gravel
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  E)
  None of these
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• question_answer19)
  In which one of the following changes two substances react chemically?
  A)
  Melting of ice     
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  B)
  Rusting of iron
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  C)
  Boiling of alcohol
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  D)
  Tearing of paper
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  E)
  None of these
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• question_answer20)
  Which one of the following is a combination reaction?
  A)
  \[2Mg+{{O}_{2}}\to 2MgO\]
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  B)
  \[{{N}_{2}}+3{{H}_{2}}\to 2N{{H}_{3}}\]
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  C)
  \[2{{H}_{2}}O\to 2{{H}_{2}}+{{O}_{2}}\]
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  D)
  Both and                            
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  E)
  None of these
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• question_answer21)
  Find the odd one from the following.
  A)
  Nostrils
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  B)
  Pharynx
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  C)
  Trachea
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  D)
  Ureters
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  E)
  None of these
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• question_answer22)
  Name the instrument which is used to measure the humidity.
  A)
  Rain gauge
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  B)
  Hygrometer
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  C)
  Stethoscope
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  D)
  Endoscope
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  E)
  None of these
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• question_answer23)
  Which one of the following animals is well adapted to live in the rainforests?
  A)
  Seal
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  B)
  Camel
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  C)
  Elephant
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  D)
  Lion
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  E)
  None of these
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• question_answer24)
  Which one of the following is an acid?
  A)
  Calcium hydroxide
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  B)
  Ammonium hydroxide
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  C)
  Sodium carbonate
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  D)
  Magnesium hydroxide
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  E)
  None of these
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• question_answer25)
  Which one of the following types of soil is the best for growing pulses?
  A)
  Sandy soil
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  B)
  Clayey soil
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  C)
  Loamy soil
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  D)
  All of these
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  E)
  None of these
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• question_answer26)
  In case of tornado, it is good to take shelter:
  A)
  in a car
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  B)
  in a room having many large windows
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  C)
  in a room  situated  underground or deep inside a building with no windows
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  D)
  under a big tree
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  E)
  None of these
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• question_answer27)
  Which one of the following is not true about cellular respiration?
  A)
  It releases energy
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  B)
  It occurs only during the day
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  C)
  It utilizes oxygen and liberates carbon dioxide
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  D)
  It occurs in all living things
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  E)
  None of these
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• question_answer28)
  Which one of the following factors determines the climate of a place?
  A)
  Distance from the equator
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  B)
  Distance from sea or high mountain ranges
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  C)
  Height above sea level
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  D)
  All of these
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  E)
  None of these
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• question_answer29)
  Name the process which is involved in the absorption of water from the soil by the roots of a plant?
  A)
  Transpiration     
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  B)
  Translocation
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  C)
  Osmosis
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  D)
  Respiration
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  E)
  None of these
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• question_answer30)
  Which one of the following statements about the image formed by a plane mirror is correct?
  A)
  It is a real image
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  B)
  Image is always formed in front of the mirror
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  C)
  Image is always smaller than the object
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  D)
  Image is always inverted
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  E)
  None of these
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• question_answer31)
  Which one of the following reproduces by spore formation?
  A)
  Ferns
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  B)
  Mosses
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  C)
  Bread moulds
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  D)
  All of these
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  E)
  None of these
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• question_answer32)
  Which one of the following statement is correct about ammeter?
  A)
  It is a safety device that cuts off the supply if suddenly heavy current starts flowing in the circuit.
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  B)
  It is an instrument that measures the current flowing in the circuit.
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  C)
  It is a device which supply current in circuit.
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  D)
  It is an instrument which is used to measure the resistance of the circuit
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  E)
  None of these.
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• question_answer33)
  Which component of blood is responsible for blood clotting in case of cut or wound?
  A)
  RBC     
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  B)
  WBC
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  C)
  Haemoglobin     
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  D)
  Platelets
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  E)
  None of these
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• question_answer34)
  Which one of the following statement is correct for nephron?
  A)
  It is a tiny filtering unit of kidney.
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  B)
  It is a tube which carries urine from kidney to urinary bladder.
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  C)
  It brings blood from arteries to kidney.
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  D)
  All of these
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  E)
  None of these
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• question_answer35)
  Which one of the following statement is correct about budding?
  A)
  It is an asexual method of reproduction.
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  B)
  It is a sexual method of reproduction.
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  C)
  It is a method of growing new plants from the flower of parent plant.
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  D)
  It is a method of transforming a baby plant to a big plant.
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  E)
  None of these
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• question_answer36)
  The upper two chambers of our heart are called:                                             
  A)
  Auricles
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  B)
  Ventricles                
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  C)
  Pulmonary veins
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  D)
  Pulmonary arteries
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  E)
  None of these
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• question_answer37)
  Find the odd one from the following.
  A)
  Meter
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  B)
  Second
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  C)
  Kelvin
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  D)
  Celsius
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  E)
  None of these
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• question_answer38)
  Which one of the following statements is correct?
  A)
  Inhaled air contains less oxygen than exhaled air.
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  B)
  Exhaled air contains less carbon dioxide than inhaled air.
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  C)
  Inhaled air contains less water vapour than exhaled air.
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  D)
  All of these
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  E)
  None of these
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• question_answer39)
  The bulb in the circuit does not glow. Identify the problem.
  A)
  The switch is off
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  B)
  The circuit is open
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  C)
  Batteries are wrongly connected
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  D)
  All of these
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  E)
  None of these
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• question_answer40)
  Which one of the following statements is correct?
  A)
  Forests help in maintaining water cycle in nature.
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  B)
  Forests maintain the balance between carbon dioxide and oxygen in the atmosphere.
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  C)
  Forests prevent soil erosion.
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  D)
  All of these
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  E)
  None of these
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