CBSE Class 3 Science NSO Olympiad MCQs with Answers Set S

LOGICAL REASONING

Question. Which of the following number will complete the given number pattern?

A. 68
B. 72
C. 66
D. 62
Answer : A

Question. There were 4 ladies at a party. Each lady shook hands once with each other. How many handshakes took place?
A. 12
B. 5
C. 6
D. 9
Answer : C

Question. Select a figure from the options which is exactly embedded in the Fig. (X).

Answer : D

Question. Find the mirror image of Fig. (X), if the mirror is placed along MN.

Answer : B

Question. Find the combination of numbers so that letters are arranged according to form a meaningful word.
C E L A M
1 2 3 4 5
A. 1, 4, 5, 3, 2
B. 1, 4, 5, 2, 3
C. 5, 3, 4, 2, 1
D. 5, 4, 3, 2, 1
Answer : B

SCIENCE

Question. Read the given paragraph.
The tiny grains that make up rocks are called ________. Some rocks are made of ________ type of grains while others are made of several types of grains. Diamond is the hardest _________ while _________ is a soft rock.
Select the option which consists of words that will correctly complete the above paragraph.
A. Particles, one, mineral, talc
B. Minerals, few, rock, talc
C. Minerals, one, mineral, chalk
D. Particles, few, rock, chalk
Answer : C

Question. Read the following incomplete sentences.
(a) The lowland between two hills is called a _________ .
(b) Highland which is flat on top is called a _______ .
Select the option that correctly fills the blanks in the above given sentences.
A. (a)-Valley, (b)-Plain
B. (a)-Valley, (b)-Plateau
C. (a)-Hill, (b)-Tableland
D. (a)-Hill, (b)-Plain
Answer : B

Question. The Earth's __________ causes the change in the seasons.
A. Rotation
B. Tilted axis
C. Revolution
D. Both B and C
Answer : D

Question. Which of the following statements about water are correct?
1. It has mass. 2. It has definite shape.
3. It has no definite volume. 4. It can change from one state to another.
A. 1 and 4 only
B. 2 and 3 only
C. 3 and 4 only
D. 1 and 2 only
Answer : A

Question. Which of the given processes involves the change of state from a liquid to a gas?
A. Melting of an ice-cream.
B. Formation of ice cubes in the freezer.
C. Drying of wet clothes hung outside.
D. Dissolving of sugar in lemonade.
Answer : C

Question. The given picture shows a potted plant. Which of the following factors may be responsible for such condition of the plant ?
1. No water 2. No light
3. No minerals 4. Attacked by diseases

A. 1 only
B. 1 and 2 only
C. 1, 2 and 4 only
D. 1, 2, 3 and 4
Answer : C

Question. Select the INCORRECT statement.
A. Preserved food has conditions suitable for the growth of germs.
B. Reheating food again and again can destroy nutrients present in it.
C. Old people need food that is soft and properly cooked.
D. Growing children need more proteins to build strong muscles.
Answer : A

Question. Abhishek blew hard on a mirror surface. He observed that the mirror became misty. What can he conclude from this activity?

A. Carbon dioxide is given off when we exhale.
B. Oxygen is given off when we exhale.
C. Water vapours are given off when we exhale.
D. None of these
Answer : C

Question. Which of the following birds have the type of feet shown in the given picture?

A. Birds that eat fish.
B. Birds that live mostly in water.
C. Birds that eat worms.
D. Birds that perch on trees.
Answer : B

Question. Refer to Kunal's statement.
Which of the following most likely forms the major part of his diet?

Answer : A

Question. Read the given conversation of Ms. Zarrin’s pupils.
Garima : Priya, your hair is so silky!
Priya : Garima! I like the fragrance of your perfume.
Beena : Why you both are making noise?
Latika : Let them talk, we will watch this video.
Sense used by which pupil will also help her in differentiating hot coffee and cold drink?
A. Beena
B. Garima
C. Latika
D. Priya
Answer : B

Question. Unscramble the given letters and select the option that gives name of the bird that nests in holes made in tree trunk.
A. ENPGINU
B. CODEWPOKRE
C. RAOBDTLIIR
D. EGIPNO
Answer : B

Question. Select the correct option regarding a good house.
A. It should have wire netted doors and windows.
B. It should have open spaces like balconies and/or verandahs.
C. It should have windows and doors opposite to each other to maintain proper ventilation.
D. All of these
Answer : A

Question. Match column I with column II and select the correct option.
          Column I                         C olumn II
(a) Run on petrol                   1. Bullock-cart
(b) Run by electricity             2. Scooter
(c) Driven by animals            3. Cycle-rickshaw
(d) Run by manpower           4. Metro train
A. (a)-4, (b)-1, (c)-3, (d)-2
B. (a)-3, (b)-2, (c)-4, (d)-1
C. (a)-3, (b)-4, (c)-2, (d)-1
D. (a)-2, (b)-4, (c)-1, (d)-3
Answer : D

Question. Select the statements that show similarities between hibiscus and pea plant?
1. They grow on land. 2. They have flowers.
3. They have weak stems . 4. They produce edible fruits.
A. 1 and 2 only
B. 3 and 4 only
C. 1, 2 and 3 only
D. 1, 2, 3 and 4
Answer : A

Question. Select the incorrect statement about the means of communication related to the picture shown here.

A. We can send parcels anywhere in the world using it.
B. We can buy stamps from here.
C. We can send instant messages from here.
D. We can also keep various kinds of deposits here.
Answer : C

Question. The given picture shows the house in which Ranjit lives. Which of the following is most likely the source of the clothing material used by him?

A. Cotton plant
B. Sheep and Yak
C. Silkworm
D. Jute and coconut plants
Answer : B

Question. Select the correct statement about the festival shown in the given picture.

A. Gujhiyas are made and gulal is put on each other.
B. Three effigies are burnt as a symbol of victory of good over evil.
C. Meethi sevaiyan are made and gifts are given to relatives and younger ones.
D. People burn firecrackers.
Answer : C

Question. A steel glass is fixed to a wooden stand through a clamp, as shown in the picture.
A light source is shone at the top of this set up.
Which of the following shadows will be formed on the screen?

Answer : C

Question. The sound travels fastest in _______ medium.
A. Gaseous
B. Liquid
C. Solid
D. Vacuum
Answer : C

Question. Read the given sentences.
Air contains important gases like P and Q. We breathe in P and breathe out Q.
Identify the gases P and Q and select the correct option.
A. P-Oxygen, Q-Carbon dioxide
B. P-Nitrogen, Q-Carbon dioxide
C. P-Oxygen, Q-Nitrogen
D. P-Carbon dioxide, Q-Oxygen
Answer : A

Question. Refer to the given statement.
I sell fresh vegetables and fruits, I am a __ R __ __ N G __ __ __ e r. Now, select the option that contains the correct sequence of letters to be filled in the above blanks.
A. F, U, I, R, O, C
B. G, E, E, R, O, C
C. E, E, G, O, C, R
D. I, C, R, O, F, U
Answer : B

Question. Rohit bounced from his car seat and knocked his head badly on the car roof. Which of the following road safety signs has his father ignored while driving the car?

Answer : B

Question. We can keep our environment clean by _______.
A. Throwing garbage in water bodies
B. Burying non-recyclable material for decaying
C. Planting trees
D. Burning dried leaves to reduce garbage
Answer : C

Question. Cereal plants are rich source of _____________.
A. Carbohydrates
B. Proteins
C. Fats
D. Vitamins and minerals
Answer : A

ACHIEVERS SECTION

Question. Refer to the given flow chart and select the correct option regarding it.

        X             Y               Z
A. Moon       Sun         Earth
B. Star         Earth       Moon
C. Earth       Star         Moon
D. Sun         Moon       Earth

Answer : B

Question. Ritika tied four rubber bands of different thickness on four identical boxes at identical positions. Which of these set ups will produce the loudest sound on striking the rubber band with the finger?

Answer : B

Question. Rahul wanted to test three types of soil, on the basis of rate of water seepage through them. He poured 5 mL water into 100 gms of each soil taken in three identical troughs (P, Q and R), each with a hole at the base. The amount of water that flowed out through these troughs was collected in three different graduated beakers, respectively. Rahul then tabulated his recordings as shown here.
Study the table and identify the type of soil generally found in deserts.

A. P
B. Q
C. R
D. Cannot be predicted
Answer : A

Direction : Refer to the given word grid and answer the questions a and b.

Question a. Which of the following organisms is NOT hidden in this grid?
A. Animal with tusks.
B. Bird that makes a nest by stitching leaves together.
C. Animal that can live both on land and in water.
D. A shrub that bears prickles and beautiful, red scented flowers.
Answer : C

Question b. How many cereal plants are hidden in this word grid?
A. 4
B. 6
C. 5
D. 3
Answer : A