Science question paper - Class VIII Marks - 40 M Chapter 1 - 8 and Chapter 11th and 12th

1. Subject: Science
Date:29/10/2020 Time: 1 Hour
Max. Marks: 40
GeneralInstruction:
1) All the questions are compulsory.
2) Section A contains Q. No.1 to 15 of multiple-choice/ Fill in the blanks type of
questions carrying one mark each.
3) SectionB contains Q. No.16 to 20 of short answer type of questions carrying two marks
each.
4) Section C contains Q. No. 21 to 25 of short answer type of questions carrying three
marks each.
SECTION A [15 MARKS]
Q.1) The farm appliance‘Combine’ is a combined
a) Ploughand Harvester b) Seeddrill cum Thresher
c) Harvester andThresher d) Harvester cum Sprayer
Q.2) The microbeforMalaria is carried by
a) Male Anopheles mosquito b) Female Anopheles Mosquito
c) Male Aedesmosquito d) Female Aedes mosquito
Q.3) Polycot is made by mixingtwo types of fibres namely
a) Silk + Cotton b) Polythene + cotton
c) Silk + Polyester d) Polyester+ Cotton
Q.4) Whena copper vessel is exposed to moist air forlong, it acquires a dull green
coating. Thegreenmaterial is a mixture of
a) Copperoxide andCopperNitrate b) Copper hydroxide & CopperCarbonate
c) Copper carbonate andCopper sulphate d) Copper hydroxideand CopperNitrate
Q.5) The slow process of conversion of dead vegetation into coal is called
a) Carbonisation b) fuelification
c) Coalification d) Noneof the above
Q.6) A person caught fireon clothes is wrapped with blanket because
a) Theperson suddenly feels cold b) To hide the burnt body parts
c) The person’s clothesgets burnt d) To reduceair supply andput fireoff
Q.7) Migratory birdsfly to faroff places in a particular seasonof the yearbecause that
placebecomes
a) Very cold b) Very hot
c) Peoplehunt birds d) Birds donor
Q.8) Which of the following combinations arepresent in plant cell but not in animal cell
a) Cell Wall & Plastid b) Cell wall and Cell membrane
c) Plastid and Nucleus d) Cell Membrane andCytoplasm
Q.9) 1-kilogram weight is equal to
(a) 98 N (b) 9.8 N
(c) 0.98 N (d) 0.098 N
Q.10) Whenever the surfaces in contact tend to move or move with respect to
each other, the force of friction comes into play
(a) only if the objects are solid.

2. (b) only if one of the two objects is liquid.
(c) only if one of the two objects is gaseous.
(d) irrespective of whether the objects are solid, liquid or gaseous.
Fill in the blanks
Q.11) The same kind of plants grown and cultivated on a large scale at a place
is called the _______.
Q.12) Microorganisms can be seen with the help of a __________
Q.13) Synthetic fibres are synthesised from raw material called ________.
Q.14) Metals react with acids to produce _______ gas.
Q.15) Process of separation of different constituents from petroleum is
called ________.
SECTION B [10 MARKS]
Q.16) Make a labelled diagram of a candle flame.
Q.17) Differentiate between the Wildlife sanctuary and biosphere reserve
Q.18) Write short notes on the Cytoplasm
Q.19) In the following situations identify the agent exerting the force and the
object on which it acts. State the effect of the force in each case.
(a) Squeezing a piece of lemon between the fingers to extract its juice.
(b) Taking out paste from a toothpaste tube.
Q.20) Give examples to show that friction is both a friend and a foe.
SECTION C [15 MARKS]
Q.21) Complete the following word puzzle with the help of clues given below.
Down - 1. Providing water to the crops.
2. Keeping crop grains for a long time under proper conditions.
5. Certain plants of the same kind grown on a large scale.
Across - 3. A machine used for cutting the matured crop.
4. A rabi crop that is also one of the pulses.
6. A process of separating the grain from chaff.

3. Q.22) Match the organisms in Column A with their action in Column B.
Q.23) Give examples which indicate that nylon fibres are very strong.
Q.24) Give reasons for the following.
(a) Aluminium foils are used to wrap food items.
(b) Immersion rods for heating liquids are made up of metallic substances.
(c) Copper cannot displace zinc from its salt solution.
Q.25) What are the advantages of using CNG and LPG as fuels?