CBSE Class 3 Science NSO Olympiad MCQs with Answers Set B

Question. 

Which of the following could be animal 'X'?
A. Lion
B. Snake
C. Squirrel
D. Giraffe
Answer : B

Question. What would happen if frog population from the given food chain is completely removed?
Grass → Grasshopper → Frog → Snake → Eagle
A. Grasshopper population will increase
B. Decrease in number of eagles
C. Grass population will decline with time
D. All of these
Answer : D

Question. Unscramble the given letters to find out the plant part which stores food in ginger.
A. T M S E
B. E A L F
C. L F W E O R
D. D E S E
Answer : A

Question. Why mushroom CANNOT make its own food?
A. Roots are poorly developed and do not absorb enough water from soil.
B. It has very thin and weak stem.
C. It lacks green pigment chlorophyll.
D. Leaves do not have stomata required for gaseous exchange.
Answer : C

Question. Which among the following birds makes nest on ground using pebbles?
A. Weaver bird
B. Eagle
C. Tailor bird
D. Penguin
Answer : D

Question. Identify INCORRECT statement about birds.
A. Flesh eating birds have sharp claws called talons.
B. Weaver bird uses needle like beak to sew leaves together to build nest.
C. Bats have wings but not feathers.
D. Cranes have hollow bones.
Answer : B

Question. Read the given statements and select the option which correctly fills the blanks.
1. Cereals and bread are rich sources of _________.
2. Food rich in _________ helps us to repair body when injured.
3. _________ is the complete food for babies until the age of six months.
         1                                2                    3
A. Fats                          Minerals         Cereals
B. Carbohydrates         Vitamins          Fruits
C. Proteins                   Vitamins          Milk
D. Carbohydrates         Proteins          Milk
Answer : D

Question. Rohan ate bread and omelette with a glass of milk in breakfast. During mid-morning snack, he ate fruit salad of papaya, apple and banana. Which of the given food items is required for strong teeth and bones of Rohan?
A. Omelette, as it is a protein source
B. Bread being carbohydrate source
C. Milk as it contains calcium
D. Fruits as they contain lots of vitamins
Answer : C

Question. Study the given relationship.
Method of cooking : Baking :: Method of preservation : X
Which of the following correctly identifies X?
A. Freezing
B. Steaming
C. Frying
D. Grilling
Answer : A

Question. Which of the following clothes would NOT be worn by the people living in house shown in the given figure ?

Answer : B

Question. Kiara described a fibre as follows :
1. It is a natural plant fibre.
2. It is worn during hot and dry weather.
3. It absorbs sweat.
Which of the following fibres is she talking about?
A. Nylon
B. Silk
C. Cotton
D. Both A and C
Answer : C

Question. Amit have his exams in few days. He has to study with full concentration. In which of the following rooms of his house should he study?

Answer : D

Question. Match column I with column II and select the correct option.

A. a - 1, b - 3, c - 4, d - 2
B. a - 4, b - 3, c - 2, d - 1
C. a - 2, b - 3, c - 1, d - 4
D. a - 4, b - 3, c - 1, d - 2
Answer : D

Question. Sonia used 'X' to send the message to her friend living in another country. Which among the following can be 'X'?
A. Postcard
B. Aerogramme
C. Inland letter
D. Both A and B
Answer : D

Question. Select the correct statement regarding means of communication.
A. Postcard is a written means of communication and delivered immediately.
B. Radio is a one-way communication.
C. Newspaper is an audio visual means of communication.
D. PIN codes are not required for speed post.
Answer : B

Question. When we suddenly touch a hot cup of tea, we immediately pull back our hand. Which sense organ and organ system are involved in this situation?
A. Eyes and circulatory system
B. Skin and circulatory system
C. Eyes and nervous system
D. Skin and nervous system
Answer : D

Question. Organ system 'X' of humans is different in men and women. It helps to maintain life on earth. Identify 'X'.
A. Respiratory system
B. Reproductive system
C. Digestive system
D. Circulatory system
Answer : B

Question. Different body organs help to remove waste materials from the body. Which among the following is NOT an excretory organ?
A. Lungs
B. Kidney
C. Liver
D. Skin
Answer : C

Question. You are making a model of the Sun, Earth and Moon to show their relative masses. If you take cricket ball as Earth, then _________ can be taken as Sun and _________ can be taken as Moon.
A. Football, Lawn tennis ball
B. Lawn tennis ball, Base ball
C. Basket ball, Table tennis ball
D. Billiard ball, Golf ball
Answer : C

Question. Which of the following is NOT true about heavenly bodies?
A. Weight on the Earth is six times of the weight on the Moon.
B. Sun is a star made up of huge mass of very hot gases.
C. Mars is the lightest planet of the solar system.
D. Craters are large potholes on the Moon's surface.
Answer : C

Question. Refer to the given diagram of a part of the solar system. Which of the following complete its one revolution in about 28 days ?

A. Q
B. S
C. R
D. P
Answer : D

Question. Observe the given figures carefully. Which among the following has maximum mass?

Answer : A

Question. Study the given classification chart carefully. Object 'X' cannot be placed under both groups. What could object 'X' be made of ?

A. Plastic bag
B. Chalk
C. Rubber toy
D. Raincoat
Answer : B

Question. Light has various properties. Due to property 'X' of light, we have both days and night on the Earth. If light does not have property 'X', then we would be having only days.
Which of the following is the property 'X' of light?
A. Light reflects back
B. Light travels in straight line
C. All objects do not give us light
D. None of these
Answer : B

Question. Identify the figure which shows that force can change the shape of the object.

Answer : C

Question. In the given diagram, Shreya is pushing a trolley in the direction shown by thickest arrow. Select an option which shows the forces acted in direction 1 and 2 respectively.
              1                                    2
A. Frictional force              Gravitational force
B. Gravitational force         Elastic force
C. Gravitational force         Gravitational force
D. Gravitational force         Frictional force
Answer : D

Question. Select the option which on unscrambling gives the name of the gas which is most abundant in atmosphere.
A. EXOGNY
B. YGHORDNE
C. NNGTROIE
D. BROCAN IODEDXI
Answer : C

Question. Look at the animals given below and select the one that does not belong to the group.

Answer : A

Question. Which of the following functions is/are performed by the

A. It protects soft internal organs like heart and lungs
B. It gives shape to the body and forms framework of the body.
C. It brings about movement of some body parts.
D. All of these
Answer : D

Question. Read the given classification table. Which of the following can 'X' be?

A. Potato
B. Turnip
C. Cabbage
D. Broccoli
Answer : D

ACHIEVERS SECTION

Question. Match the following columns and select the correct option.

A. 1 – (c) – (i); 2 – (b) – (iii); 3 – (d) – (iv); 4 – (a) – (ii)
B. 1 – (c) – (ii); 2 – (a) – (iii); 3 – (d) – (iv); 4 – (b) – (i)
C. 1 – (d) – (ii); 2 – (c) – (iv); 3 – (b) – (iii); 4 – (a) – (i)
D. 1 – (c) – (iii); 2 – (a) – (iv); 3 – (d) – (i); 4 – (b) – (ii).
Answer : B

Question. In the given word grid, names of some body parts are hidden. How many words are there?

A. 5
B. 6
C. 7
D. 8
Answer : C

Question. Riya observed the different phases of Moon and noted the dates on which the phases were observed. She has noted Half Moon on 15th November and Full Moon on 22nd November. Which phase of the Moon, did she see between 15th and 22nd November?

Answer : B

Question. The given figure shows three states of matter changing from one form to another. Which of the given options correctly represents process '1' and '3'?
            1                       3
A. Evaporation        Condensation
B. Melting               Freezing
C. Melting               Condensation
D. Evaporation       Freezing

Answer : C

Question. Read the discussion given below. Which option holds true regarding this discussion?
Kavya : Humus present in top layer of soil reduces plant growth.
Ravi : Water cycle involves continuous processes of evaporation and condensation.
Sumit : Drinking water polluted with wastes from sewage and homes causes diseases like dysentery and diarrhoea.
Diya : Some solids change their forms on heating and on cooling.
A. Only Sumit and Diya made correct statements.
B. Kavya made an incorrect statement while Ravi and Sumit made correct statements.
C. Ravi, Diya and Kavya made correct statements.
D. Kavya and Sumit made correct statements while Ravi and Diya made incorrect statements.
Answer : B