CBSE Class 6 Science Sample Paper Set 1

1. Choose the correct option and put a tick mark against it. (10 x 1 = 10)

a) The major component in air, which does not support burning, is ------------------

(i) Hydrogen    (ii) Nitrogen    (iii) carbon dioxide    (iv) all of the above

b) An example of a luminous object is ---------------------------------.

(i) torch    (ii) moon    (iii) earth    (iv) mirror

c) Some trees are normally cone shaped and have sloping branches. They are found in ----------------------- habitat.

(i) grassland    (ii) desert    (iii) mountain    (iv) both (i) and (ii)

d) Red worms have a structure called ----------------------- which help in grinding food.

(i) gizzard   (ii) teeth   (iii) villi    (iv) all of the above

e) Water vapour enters the air through the process of ----------------------------.

(i) Evaporation   (ii) Transpiration   (iii) condensation   (iv) both (i) and (ii)

f) An example for a magnetic substance is -----------------------------.

(i) Nickel    (ii) oxygen    (iii) a and b    (iv) none.

g) All electric cells have a -------------------------- terminal.

(i) positive    (ii) negative    (iii) chemical    (iv) positive and negative

h) A ball rolling on the ground undergoes ------------------------- motion.

(i) periodic   (ii) rectilinear and rotational    (iii) straight line    (iv) all of the above

i) The device that is used to break an electric circuit is called -----------------------.

(i) switch    (ii) filament    (ii) electric cell    (iv) electric bulb.

j) The metric system was created as a standard unit of measurement by -----------------------.

(i) Greek   (ii) French    (iii) Indians    (iv) Portuguese.

2. Answer the following very briefly. (10x1=10)

a) How is the balance of oxygen and carbon dioxide in the atmosphere maintained?

a) (i) Respiration in plants and animals (½) 

(ii) Photosynthesis in plants (½)

b) What are opaque objects?

b) Objects which do not allow light to pass through them are called opaque.

c) How do gills help a fish to live in water?

c) Gills help fish to use oxygen dissolved in water.

d) What does magnetite contain?

d) Iron

e) What do plastics give out upon heating and burning?

e) Harmful gases

f) Name 2 materials that are used as insulators.

f) Plastic, rubber

g) What is the name of the low lying place where garbage is dumped?

g) Landfill

h) What is the larger unit of length?

h) Kilometre (km)

i) Name any two devices which should be kept away from magnets.

i) Mobiles, television, music system, compact discs, and computer.

j) What happens when there is excessive rain?

j) Leads to rise in water level in rivers, lakes and ponds. 

Water spreads over large areas causing floods. 

3. Answer the following questions briefly. (8 x 2 = 16)

a) How are dust particles prevented from getting into the respiratory system?

a) (i)Fine hair 

(ii) mucus inside the nose prevent dust particles

b) Give two examples of periodic motion that we see in our everyday life.

b) Any two apt examples

c) How do magnets lose their properties and become weak?

c) (i) Magnets loose their properties if they are heated, hammered or dropped from some height. (1) 

(ii) They become weak if not stored properly.

d) State any four ways through which we can minimize the over use of plastics.

d) (i) carry cloth or jute bag for shopping

(ii) re-use the bags if possible without adverse effect.

(iii) Insist shopkeepers to use paper bags. 

(iv) Do not throw plastic bags here and there after use

e) What the important factors for shadow formation.

e) (i) source of light (ii) opaque object (iii) screen (2) (Any two)

f) Why do animals living in the soil come out when it rains heavily?

f) (i) When it rains heavily water fills up the spaces in the soil

(ii) Air from the spaces comes out and the organisms come out of the soil for respiration.(1+1)

g) Show the direction of current in an electric circuit with the help of a diagram.

g) Refer to Fig. 12.6 , P – 119.(2)

h) Why do we see water drops on the outer surface of a glass containing iced water?

h) (i)The cold surface of the glass containing iced water, cools the air around it. 

(ii) Water vapour of the air condenses on the surface of the glass

4. Answer the following in detail. ( 8 x 3 = 24 )

a) How is a deer adapted to live in grasslands?

a) (i) strong teeth for chewing hard plant stems.

(ii) Long ears to hear movements.

(iii) Eyes on the side of its head to look in all directions and speed to run away from predators.

b) Explain with an activity which shows that mirror changes the direction of light that falls on it.

b) In a dark room a child can stand in a corner with a torch and switch it on and direct the light onto a mirror that another friend is holding. A patch of light is seen on the mirror. Adjust the direction of the torch so that the light patch falls on another friend standing in another corner.(3)

c) Explain with a pie diagram to show the composition of air.

c) Refer Fig.15.9 P- 151. (1)

Nitrogen and oxygen make up 99%

Carbondioxide , few gases , water vapour and dust particles make 1% (1+1)

d) Classify the following into Rectilinear/Circular or Period motion.

(i) Blades of a fan when it is switched on

(ii) A girl playing on a swing 

(iii) Strings of a guitar being played

(iv) Sprinters in a 50m race.

(v) Movement of hands of soldiers in a parade.

(vi) A stone which is thrown upwards.

d) (i) Circular

(ii) Periodic

(iii) Periodic

(iv) Rectilinear

(v) Periodic 

(vi) Rectilinear (Each answer carries ½ mark)

e) How does the process of condensation play an important role in bringing water back to our earth?

e) (i) As we go higher and higher, air gets cooler.

(ii) Water vapour condenses to form tiny drops of water called droplets.

(iii) These tiny droplets come together to form drops of water which gets heavy and begin to fall as rain.

f) List out the ways in which air plays an important role for both living and nonliving things.

f) (i) Air is necessary for respiration of living organisms.

(ii) Air helps in movement of sailing yatch, gliders, parachutes and aeroplanes.

(iii) Birds, bats and insects are able to fly.

(iv) Helps in dispersal of seeds and pollen of flowers.

(v) Important role in water cycle.

Any three valid points covering living and non-living Organisms.(1+1+1+1)

g) How can you prove that light travels along a straight line with an activity?

g) Light a candle and fix it on a table. Standing at one corner look at the candle through a pipe. It is visible. Bend the pipe a little and look at the candle. Its not visible. This suggests light travels along a straight line.(3)

h) State the consequences that follow if there is no rain for a long period of time.

h) (i) Soil continues to lose water by evaporation and transpiration and becomes dry.

(ii) Level of water in ponds and wells goes down and dry up. 

(iii) Ground water may become scarce and may lead to drought. (1+1+1)

5. Answer the following. ( 4 x 5 = 20)

a) Prove with the help of an activity that a freely suspended magnet aligns itself in the North-South direction.

a) Take a bar magnet and mark one of its ends for identification. Tie a thread at the middle of the magnet and suspend it from a wooden stand so that it can rotate freely. Let it come to rest and mark two points on the ground to show the position of the ends of the magnet. Draw a line joining the two points. Rotate the magnet in different directions and note the final direction. It always comes to rest in the same North-South direction.

b) What is vermicomposting? How can we prepare it?

b) Dig a pit or box and spread a net or chicken mesh ,spread some vegetable wates including fruit peels,leaves, dreied stalks husk or newspaper, cardboard. Dried animal dung could be covered along with sand. Sprinkle some water and keep it loose. Put redworms and cover them loosely with a gunny bag or an old sheet of cloth or grass layer. Vegetable,fruit wastes, weeds, coffee remains can be given and after 3 to 4 weeks loose soil-like material is observed.This is vermicompost.(5)

c) How can you make an electric switch at home using simple things?

c) Refer Fig.12.8, P-120. (1)

Take two drawing pins, a safety pin, two wires and small sheet of thermocol. Insert a drawing pin into the ring at one end of the pin and fix it on the sheet in a way that the safety pin can be rotated freely. Fix the other drawing pin on the sheet in a way that the free end of the safety pin can touch it. 

d) How is a camel adapted to survive in the harsh desert conditions?

d) (i) Have long legs to keep their bodies away from the heat of the sand.

(ii) Excrete small amount of urine.

(iii) Dung is dry.

(iv) They do not sweat.

(v) Lose very little water from their bodies and can live for many days without water. Each point carries 1 mark. 

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