CBSE Class 6 Science NSO Olympiad MCQs with Answers Set K

MENTAL ABILITY

Question. 1 crore = _______ lakhs.
(A) 10
(B) 100
(C) 1000
(D) 10,000
Answer : B

Question. Pratik is standing at point P, facing the shop. He takes a 3/4 turn anticlockwise and then turns 270° in the clockwise direction. What is he facing now?

(A) Church
(B) Bank
(C) Railway Station
(D) Shop
Answer : D

Question. Jenny took 1 hour 45 minutes to complete her homework. Jiah took 5/7 of the time Jenny took.
How long did Jiah take to complete her homework?
(A) 1 hour 45 minutes
(B) 1 hour 15 minutes
(C) 2 hour 4 minutes
(D) 2 hours
Answer : B

Question. Choose the correct mirror image of the given word, if the mirror is placed vertically left.

Answer : B

Question. The length and breadth of a playground are 75 m 20 cm and 34 m 80 cm respectively. How long will a boy take to go three times round the field if he walks at the rate of 1.5 m per second?
(A) 7 mins 20 secs
(B) 12 mins 14 secs
(C) 39 mins 16 secs
(D) 16 mins 30 secs
Answer : A

Question. Find the mean of the first 3 multiples of 5.
(A) 10
(B) 25
(C) 20
(D) 15
Answer : A

Question. Select a suitable figure from the options which will substitute the question mark so that a series is formed by the figures P, Q, R, S and T taken in order.

Answer : C

Question. The given table shows the number of rotis sold by Muthu in a week.

The number of rotis sold on Wednesday was 10 less than that sold on Thursday, and the number of rotis sold on Saturday was twice the number sold on Wednesday. The number of rotis sold on Wednesday and Saturday respectively, were ________.
(A) 60, 40
(B) 50, 100
(C) 100, 50
(D) 40, 60
Answer : B

Question. Find the difference between 16.89 × 6 and 21.88 ÷ 4.
(A) 95.87
(B) 85.97
(C) 958.7
(D) –58.29
Answer : A

Question. Find the area of the shaded region in the adjoining figure.

(A) 324 cm²
(B) 200 cm²
(C) 180 cm²
(D) 88 cm²
Answer : B

Question. If the English alphabets are written in the reverse order and every alternate letter starting with Y is dropped, which letter will be exactly in the middle of the remaining letters of the English alphabet ?
(A) M
(B) N
(C) O
(D) M or O
Answer : B

Question. The ratio of 43.5 and 25 is same as :
(A) 4 : 1
(B) 8 : 15
(C) 15 : 8
(D) 3 : 4
Answer : A

Question. Find the value of (-32) - (-14) + (-18) - (-6) + (-5) / -2 - (-3) - (-6).
(A) 5
(B) –5
(C) 1
(D) –1
Answer : B

Question. Select a figure from the options, which when placed in the blank space of figure (X) would complete the pattern.

Answer : C

Question. Arrange the given words in a meaningful sequence and then choose the most appropriate sequence from the options.
1. College 2. Child 3. Salary
4. School 5. Employment
(A) 1, 2, 4, 3, 5
(B) 2, 4, 1, 5, 3
(C) 4, 1, 3, 5, 2
(D) 5, 3, 2, 1, 4
Answer : B

SCIENCE

Question. In given diagram, when object P was placed near object Q, the ball was pushed off the table. What could objects P and Q be ?

         P               Q
(A) Steel          Plastic
(B) Nickel        Magnet
(C) Iron           Steel
(D) Magnet     Magnet
Answer : D

Question. Which one of the following sources of energy is non-renewable ?
(A) Solar energy
(B) Fossil fuels
(C) Biomass energy
(D) Geothermal energy
Answer : B

Question. The given circuit diagram shows four bulbs in a circuit. Where should a switch be installed so that only one bulb can be switched on or off while the others remain lit all the time ?

(A) A
(B) B
(C) C
(D) D
Answer : B

Question. Aparna measured the length of the shadow formed by a pole at different time of the day. The table given below shows the measurements that she recorded from her observations.

If the length of the shadow was measured at 9.00 am, which one of the following measurements is likely to be the length of the shadow ?

(A) 70 cm
(B) 40 cm
(C) 15 cm
(D) 10 cm
Answer : B

Question. What will be the correct statement for the given figure ?

(A) It occurs in daytime.
(B) Cooler air over the sea rushes towards the land to take its place.
(C) At night the sea is warmer than the land.
(D) Both (A) & (B).
Answer : C

Question. The height of our school building is 8 m 25 cm. This is same as _____.
(A) 8025 cm
(B) 825 cm
(C) 8250 cm
(D) 80025 cm
Answer : B

Question. The motion of the wheels of a horse driven cart is _____.
(A) Rectilinear
(B) Translation
(C) Rotational
(D) Rotational and translation
Answer : D

Question. Which of the following absorbs light the best?
(A) A mirror
(B) A piece of white paper
(C) A black wallet
(D) A green leaf
Answer : C

Question. A bulb glows when _____.
(A) Current flows through its filament
(B) It is heated
(C) Battery is replaced
(D) Shown to light
Answer : A

Question. The motion of the second hand of a clock is _____.
(A) Circular
(B) Rotational
(C) Translatory
(D) None of these
Answer : A

Question.

(i) If material P is removed, Daksh will be able to see Poonam through material R.
(ii) If material R is removed, Poonam will not be able to see Daksh through material P.
(iii) If material S is removed, Ram is able to see blurred image of Daksh through material Q.
(iv) If material Q is removed, Daksh is not able to see Ram.
Recognise the nature of the materials P, Q, R and S.
(A) P : Transparent    Q : Translucent   R : Opaque           S : Transparent
(B) P : Translucent    Q : Opaque         R : Transparent     S : Translucent
(C) P : Opaque         Q : Translucent    R : Transparent     S : Opaque
(D) P : Transparent   Q : Opaque         R : Translucent      S : Opaque
Answer : C

Question. Heat the following rods on flame from one end. Which of the following rods will not be hot at the other end?
(i) Aluminium rod (ii) Wooden rod
(iii) Steel rod (iv) Glass rod

(A) (i), (ii)
(B) (ii), (iii)
(C) (ii), (iii) and (iv)
(D) (ii), (iv)
Answer : D

Question. Reena covered her cup of hot tea with a plastic cover and left it on the table. When she returned after 10 minutes, she observed that there were water droplets inside the plastic cover. Which of the following processes did not take place in the situation shown in the figure?

(A) Cooling
(B) Melting
(C) Evaporation
(D) Condensation
Answer : B

Question. P, Q and R in the given table are respectively

            P                                Q                             R
(A) Solid-liquid              Evaporation             Condensation
(B) Liquid-gas               Sieving                    Filtration
(C) Gas-gas                  Filtration                  Sieving
(D) Solid-liquid              Hand-picking           Filtration
Answer : D

Question. Generally gaps are given between the railway tracks. Which of the following properties of metal explains this?

(A) Metal contracts on heating.
(B) Metal expands on heating.
(C) Metal compresses on applying pressure.
(D) Shape of metal changes on heating.
Answer : B

Question. Given in the table are some daily use items made up of more than one material. Match them and select the correct option.

(A) (i) - p, q, r ; (ii) - p, t, s
(B) (i) - r, s, t ; (ii) - p, q, r
(C) (i) - r, t ; (ii) - p, q, r
(D) (i) - r, t ; (ii) - p, r, t
Answer : C

Question. Some wax was placed in a metal container. It was then heated as shown in the diagram. After a few minutes, there would be a change in the ____ of the wax.
(i) Colour (ii) State (iii) Shape
(A) (i) and (ii) only
(B) (ii) and (iii) only
(C) (i) and (iii) only
(D) (i), (ii) and (iii)
Answer : B

Question. Evaporation and condensation are taking place in the given diagram at the stages

(A) P, Q
(B) Q, R
(C) R, S
(D) S, P
Answer : C

Question. Ankita did an experiment shown in the figure. Which property can be explained by this experiment?

(A) Air moves up with large force.
(B) Air exerts pressure.
(C) Air is present everywhere.
(D) Water occupies space.
Answer : B

Question. Which of the following are characteristics of plants that live in water ?
(i) Roots are poorly developed. (ii) Stems and leaves are fleshy.
(iii) Leaves are flat and coated with wax.
(iv) Stomata are present on both the surfaces of leaves.
(v) Stem is long and flexible.
(A) (i), (iii) & (v)
(B) (i) & (iv)
(C) (ii) & (iv)
(D) (i), (ii), (iii) & (v).
Answer : A

Question. Examine the given test on a sample of food item. Which food component(s) is/are proved to be present in the sample ?

(A) Fat and carbohydrate
(B) Protein
(C) Protein and carbohydrate
(D) Carbohydrate
Answer : B

Question. Which of the following characteristics describes the animals (i) & (ii) shown in the figure ?

(A) They live in aquatic habitat.
(B) They have three stages in their life cycle.
(C) They increase the fertility of the soil.
(D) They are nocturnal animals.
Answer : B

Question. Each letter in the figure represents a stage in the life cycle of a butterfly. If Q is the adult stage then what stage is S ?

(A) Egg
(B) Pupa
(C) Larva
(D) Nymph
Answer : C

Question. "First day white, next day red, third day from my birth i'm dead".
The above rhyme refers to _____.
(A) Jute fibre
(B) Cotton flower
(C) Silkworm
(D) Coir fibre
Answer : B

Question. What are the parts labelled X in the given figure?

(A) Prop roots
(B) Lateral roots
(C) Tap roots
(D) Fibrous roots
Answer : A

Question. Examine the given figures. Which is roughage-rich food ?

(A) a
(B) b
(C) c
(D) a, b & c
Answer : C

Question. Match Column I with Column II and select the correct option from the codes given below.
      Column I                        Column II
(a) Iodine           (i) For proper functioning of the nervous system
(b) Calcium       (ii) For the formation of red blood corpuscles
(c) Iron             (iii) For strong bones and teeth
(d) Sodium       (iv) For the secretion of thyroid hormone
                        (v) For making energy-rich compounds (ATP)
(A) a-(v), b-(iv), c-(i), d-(iii)
(B) a-(iv), b-(iii), c-(v), d-(ii)
(C) a-(i), b-(ii), c-(iii), d-(iv)
(D) a-(iv), b-(iii), c-(ii), d-(i)
Answer : D

Question. What is the device shown in the figure used for ?

(A) Spinning
(B) Ginning
(C) Weaving
(D) Shearing
Answer : A

Question. Read the given statements and select the correct option.
Statement 1 : Woollen clothes are worn in cold weather.
Statement 2 : Wool fibres have less air spaces and hence entrap heat.
(A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
(B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
(C) Statement 1 is true and statement 2 is false.
(D) Both statements 1 and 2 are false.
Answer : C

Question. Which of the following statements are correct ?
(i) The pelvic girdle of female is wider than that of a male.
(ii) Femur or thigh bone is the longest bone in the human body.
(iii) Sternum protects the brain.
(iv) Human beings do not have endoskeleton.
(A) (i) & (ii)
(B) (ii) & (iii)
(C) (iii) & (iv)
(D) (i) & (iv)
Answer : A

Question. Three students gave the following statements in a classroom discussion.
Abhishek : Always wash fruits and vegetables after cutting or peeling them.
Misha : Overcooking and reheating the same food improves nutrient content.
Suneel : Excessive washing of rice and pulses may remove vitamins and minerals present in them.
Which student(s) made incorrect statement(s) ?
(A) Abhishek & Misha
(B) Misha & Suneel
(C) Abhishek & Suneel
(D) Suneel only
Answer : A

Question. Which of these body movements is not voluntary movement ?
(A) Walking and running
(B) Beating of the heart
(C) Biting and chewing
(D) Writing
Answer : B

Question. Divya performed the given experiment.

What does her experiment prove ?
(A) Roots anchor the plant.
(B) Roots absorb water and transport it to all parts of the plant.
(C) Stem conducts water from roots to various parts of the plant.
(D) Stem transports the various nutrients dissolved in water to different parts of the plant.
Answer : B

Question. Which of these is a common feature between fish and birds ?
(A) Hollow and light bones
(B) Respiration by lungs
(C) Streamlined body
(D) 2-chambered heart
Answer : C

Question. Latika's teacher gives her a plant with the following characteristics.
(i) The stem is covered with a thick waxy layer and is swollen and fleshy.
(ii) The leaves are in the shape of spine.
Latika's teacher then gives her a task to match an animal that lives in the same habitat where the given plant is found. Which of the following animals should Latika select ?
(A) Snow leopard
(B) Camel
(C) Yak
(D) Zebra
Answer : B