7th Class Science Sample Paper

done Science Olympiad Model Test Paper-2 Total Questions - 40    [Download]

• question_answer1)
  Which one of the following is a group of autotrophs?
  A)
  Wheat plant paddy plant, mushroom, cuscuta
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  B)
  Tiger, lion, elephant, peepal plant
  done clear
  C)
  Bacteria, virus, fungi, algae
  done clear
  D)
  Grasses, coconut tree, apple tree, money plant
  done clear
  E)
  None of these
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• question_answer2)
  Rising or falling of water table depends on:
  A)
  amount of rainwater that seeps into the ground
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  B)
  amount of water drawn out for irrigation
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  C)
  amount of water drawn out for industrial purpose
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  D)
  all of these
  done clear
  E)
  None of these
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• question_answer3)
  In the given word equation, process of photosynthesis has been shown. Replace X with the correct option. \[\text{Carbon}\,\text{dioxide+Water}\xrightarrow[\text{Chlorophyll}]{\text{Sunlight}}\text{X+Oxygen}\]
  A)
  Carbon dioxide
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  B)
  Glucose
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  C)
  Water
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  D)
  Chloroplast
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  E)
  None of these
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• question_answer4)
  Saprotrophs are:
  A)
  Non-living things which help organic matter in decaying
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  B)
  Living things which obtain their food from dead and decaying organic substances
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  C)
  Living things which prepare their food from simple organic substances
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  D)
  Non-living things which spread diseases in the host plants and animals
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  E)
  None of these
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• question_answer5)
  Which one of the following is a part of wastewater treatment plant?
  A)
  Clarifier
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  B)
  Vertical bars
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  C)
  Aeration tank
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  D)
  All of these
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  E)
  None of these
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• question_answer6)
  Choose the odd one from the following.
  A)
  Sheep
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  B)
  Yak
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  C)
  Llama
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  D)
  Cow
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  E)
  None of these
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• question_answer7)
  Which one of the following layers of vegetation in forest mainly consists of mature shrubs and bushes?
  A)
  Understory
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  B)
  Shrub layer
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  C)
  Canopy
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  D)
  Forest floor
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  E)
  None of these
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• question_answer8)
  Which one of the following organs does not secrete digestive juices?
  A)
  Stomach
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  B)
  Oesophagus
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  C)
  Small intestine
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  D)
  Liver
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  E)
  None of these
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• question_answer9)
  At what temperature the readings on Celsius and the Fahrenheit scales are the same?
  A)
  0 degree
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  B)
  -10 degree
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  C)
  -20 degree
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  D)
  -40 degree
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  E)
  None of these
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• question_answer10)
  Which one of the following statements is incorrect?
  A)
  Llama and Alpaca are wool yielding animals
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  B)
  The cut off 'wool coat' of a sheep (along with a thin layer of skin) is called fleece
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  C)
  Angora is a type of silk fibre
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  D)
  Silk fibres are obtained from cocoons
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  E)
  None of these
  done clear
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• question_answer11)

  Who of the following is correct?

  Tom: Temperature can be measured using a device called thermometer.

  Peter: Laboratory thermometer cannot be used to measure the temperature of an object.

  John: Heat causes an increase in temperature

  Jack: On being heated gases expand more than liquids and solids

  A)
  Tom, Peter and John
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  B)
  Peter, John and Jack
  done clear
  C)
  Tom, John and Jack
  done clear
  D)
  All of them
  done clear
  E)
  None of these
  done clear
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• question_answer12)
  When we sit in front of a room-heater, we get heat directly by the process of:
  A)
  Conduction
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  B)
  Convection
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  C)
  Radiation
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  D)
  Advection
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  E)
  None of these
  done clear
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• question_answer13)
  Acids turn China rose indicator to:
  A)
  Magenta
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  B)
  Green
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  C)
  Red
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  D)
  Colorless
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  E)
  None of these
  done clear
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• question_answer14)
  Look at the following chemical equation and choose the correct option. \[Ca{{(OH)}_{2}}\xrightarrow{{}}CaO+{{H}_{2}}O\]
  A)
  It is a double displacement reaction
  done clear
  B)
  No new substances are formed in the reaction
  done clear
  C)
  It is a decomposition reaction
  done clear
  D)
  When calcium oxide is heated calcium hydroxide and water are produced
  done clear
  E)
  None of these
  done clear
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• question_answer15)
  The gas we use in the kitchen is called LPG. In the cylinder it exists as liquid. When it comes out from cylinder, it becomes a gas (change A) then it burns (change B). The following options pertain to these changes. Choose the correct one.
  A)
  Change A is chemical change
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  B)
  Change B is a physical change
  done clear
  C)
  Change A is a physical change but change B is a chemical change
  done clear
  D)
  Change B is a physical change but change A is a chemical change
  done clear
  E)
  None of these
  done clear
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• question_answer16)
  The natural phenomena such as winds, storms and cyclones etc. occurs in the earth's:
  A)
  Hydrosphere
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  B)
  Lithosphere
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  C)
  Exosphere
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  D)
  Atmosphere
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  E)
  None of these
  done clear
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• question_answer17)
  Which one of the following is not an element of weather?
  A)
  Temperature
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  B)
  Humidity
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  C)
  Rainfall
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  D)
  Sun
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  E)
  None of these
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• question_answer18)
  Which one of the following statements is not correct?
  A)
  Polar climate is extremely cold and dry
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  B)
  Temperate climate is very hot in summer and very cold in winter
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  C)
  Tropical climate is very hot and humid
  done clear
  D)
  Desert climate is very hot and dry
  done clear
  E)
  None of these
  done clear
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• question_answer19)
  Wind plays an important role in the formation of:
  A)
  thunderstorm     
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  B)
  cyclones
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  C)
  tornadoes
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  D)
  all of these
  done clear
  E)
  none of these
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• question_answer20)
  The smallest rock particles present in the soil form:
  A)
  clay
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  B)
  silt
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  C)
  sand
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  D)
  gravel
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  E)
  None of these
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• question_answer21)
  Which one of the following materials causes soil pollution when dumped?
  A)
  Polythene bags
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  B)
  Plastics
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  C)
  Metals
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  D)
  All of these
  done clear
  E)
  None of these
  done clear
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• question_answer22)
  The process of respiration is the reverse of:
  A)
  inhalation
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  B)
  digestion
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  C)
  photosynthesis
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  D)
  reproduction
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  E)
  None of these
  done clear
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• question_answer23)
  The organic matter formed by the decomposition of dead plants and animals by the micro-organisms (like certain bacteria and fungi) is called:
  A)
  soil                   
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  B)
  humus
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  C)
  humidity           
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  D)
  biodegradable substance
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  E)
  None of these
  done clear
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• question_answer24)
  Urea is removed from blood by:
  A)
  lungs
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  B)
  kidneys
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  C)
  liver
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  D)
  pancreas
  done clear
  E)
  None of these
  done clear
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• question_answer25)
  The complete breakdown of glucose produces:
  A)
  carbon dioxide and water
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  B)
  carbon dioxide and oxygen
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  C)
  oxygen and water
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  D)
  carbon monoxide and water
  done clear
  E)
  None of these
  done clear
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• question_answer26)
  The liquid part of blood is called:
  A)
  plasma
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  B)
  platelets
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  C)
  RBC     
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  D)
  WBC
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  E)
  None of these
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• question_answer27)
  The point on the stem (or branch) of a plant, where leaf is attached, is called:
  A)
  axil
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  B)
  node
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  C)
  bud
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  D)
  all of these
  done clear
  E)
  none of these
  done clear
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• question_answer28)
  Ammeter is used:
  A)
  to measure heat produced in a circuit
  done clear
  B)
  to measure resistance of an electrical wire
  done clear
  C)
  to measure the current flowing in an electric circuit
  done clear
  D)
  all of these
  done clear
  E)
  none of these
  done clear
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• question_answer29)
  Which one of the following statements is incorrect?
  A)
  Yeast reproduces by budding
  done clear
  B)
  Spirogyra reproduces by fragmentation
  done clear
  C)
  Budding is a asexual method of reproduction
  done clear
  D)
  Fragmentation is a sexual method of reproduction
  done clear
  E)
  None of these
  done clear
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• question_answer30)
  An object is said to be in motion when:
  A)
  its velocity changes with time
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  B)
  its position changes with time
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  C)
  its motion accelerates with time
  done clear
  D)
  it maintains equal distance from a fixed point with time
  done clear
  E)
  None of these
  done clear
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• question_answer31)
  Name the electrical appliance whose symbol has been given below.
  A)
  Switch
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  B)
  Lamp
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  C)
  Ammeter          
  done clear
  D)
  Voltammeter
  done clear
  E)
  None of these
  done clear
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• question_answer32)
  A virtual image formed by a plane mirror or spherical mirror:
  A)
  is always inverted
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  B)
  is always erect
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  C)
  is always bents towards the mirror
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  D)
  is always bents away from the mirror
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  E)
  None of these
  done clear
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• question_answer33)
  The rainwater that falls on land may:
  A)
  drain into rivers and stream
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  B)
  seep through the soil and store as ground water
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  C)
  be used for irrigation
  done clear
  D)
  all of these
  done clear
  E)
  none of these
  done clear
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• question_answer34)
  Which one of the following is a long tube from mouth to anus in which digestion and absorption of food takes place?
  A)
  Alimentary canal
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  B)
  Backbone
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  C)
  Ilium and duodenum
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  D)
  Nervous system
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  E)
  None of these
  done clear
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• question_answer35)
  Which one of the following is a group of two strong acids and one weak base?
  A)
  Acetic acid. Hydrochloric acid, Sodium hydroxide
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  B)
  Sulphuric acid, Nitric acid. Potassium hydroxide
  done clear
  C)
  Hydrochloric acid. Nitric acid. Ammonium hydroxide
  done clear
  D)
  Citric acid, Tartaric acid. Sodium hydrogen carbonate
  done clear
  E)
  None of these
  done clear
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• question_answer36)
  When we breathe in:
  A)
  the diaphragm contracts and moves downwards
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  B)
  the diaphragm relaxes and moves upwards
  done clear
  C)
  the diaphragm contracts and moves upwards
  done clear
  D)
  the diaphragm relaxes and moves downwards
  done clear
  E)
  None of these
  done clear
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• question_answer37)
  Name the part which has been indicated by X in the following figure.
  A)
  Aorta
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  B)
  Pulmonary artery
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  C)
  Pulmonary vein
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  D)
  Septum
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  E)
  None of these
  done clear
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• question_answer38)
  Which one of the following plants disperses its seeds by explosive mechanism?
  A)
  Castor
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  B)
  Water lily
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  C)
  Urena
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  D)
  Xanthium
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  E)
  None of these
  done clear
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• question_answer39)
  Look at the following graph and choose the correct option.
  A)
  The object is moving with a uniform acceleration
  done clear
  B)
  The object is in rest
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  C)
  The object is moving with uniform speed
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  D)
  The object is moving with non-uniform speed
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  E)
  None of these
  done clear
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• question_answer40)

  Tony is observing his image in a plane mirror.

  The distance between the mirror and his image is 5 m. If he moves 2 m away from the mirror, then the distance between Tony and his image will be:

  A)
  3 m
  done clear
  B)
  7 m
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  C)
  10 m
  done clear
  D)
  14 m
  done clear
  E)
  None of these
  done clear
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