National Science Olympiad Forum By SOF Olympiad Trainer

Anuj Sandesh Kanekar from Shrimant Maisaheb Bavadekar Academy, Kolhapur

Subject :NSO Class : Class 6

Which among these children made an incorrect statement?

A
B
C
D

Ans 1:

Sharanya from Holy Cross School Agartala, Agartala

Class : Class 7

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Ritwic Verma from The Shri Ram School Moulsari, New Delhi

Subject :NSO Class : Class 7

A food chain in an aquarium is shown here.

If the snakeheads were removed, which graph shows the changes in the population of organisms in the aquarium?

A
B
C
D

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Aneesh Balaji from BVBARR school, Hyderabad

Subject :NSO Class : Class 3

The girl in the given picture is using trolley to overcome _________.

A The force of attraction between the Earth and the girl
B The force of attraction between the Earth and the trolley
C The force of friction between the trolley and the ground
D The force of friction between the girl and the ground

c

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Ans 1:

Aneesh Balaji from BVBARR school, Hyderabad

Class : Class 4

c

Ans 2:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

C

Ans 3:

Abhigyan Sinha from Podar International School, Powai, Mumbai, Mumbai

Class : Class 4

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Aneesh Balaji from BVBARR school, Hyderabad

Subject :NSO Class : Class 3

Which of the following statements are correct?
(i) Safety means being careful and avoiding accidents only while walking on the road.
(ii) There are rules and signs for safety of people on the ship.
(iii) We must use footpath for walking and cyclists must keep to their left.
(iv) We must cross the road as we like anywhere and everywhere.

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

banda

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Ans 1:

Aneesh Balaji from BVBARR school, Hyderabad

Class : Class 4

b

Ans 2:

SIDDHARTH SOMANI from Vibgyor High, Mumbai

Class : Class 4

B

Ans 3:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

D

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Aneesh Balaji from BVBARR school, Hyderabad

Subject :NSO Class : Class 3

Read the given statement and select the correct option regarding X and Y.
X has fixed volume, no definite shape and does not cast a shadow whereas Y has fixed volume, definite shape and casts a shadow.

A X could be milk whereas Y could be glass.
B X could be water whereas Y could be wood.
C X could be mustard oil whereas Y could be iron sheet.
D X could be wood whereas Y could be water.

b

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Ans 1:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

B

Ans 2:

Aneesh Balaji from BVBARR school, Hyderabad

Class : Class 4

b

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Aneesh Balaji from BVBARR school, Hyderabad

Subject :NSO Class : Class 3

X is connected to all the other parts of the body through the Y which contains thin, thread-like tubes that run all around the body called Z. Select the option which correctly identifies X, Y and Z.

	X	Y	Z
A	Nerve	Brain	Spinal cord
B	Spinal cord	Brain	Skull
C	Brain	Spinal cord	Nerves
D	Spinal cord	Skull	Brain

c

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Ans 1:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

C

Ans 2:

Aneesh Balaji from BVBARR school, Hyderabad

Class : Class 4

Ans 3:

Aneesh Balaji from BVBARR school, Hyderabad

Class : Class 4

c

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Aneesh Balaji from BVBARR school, Hyderabad

Subject :NSO Class : Class 3

Which of the following is correct regarding the characteristics of oxygen?

	Definite shape	Definite volume	Compressible
A	Yes	No	No
B	No	Yes	No
C	Yes	No	Yes
D	No	No	Yes

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Ans 1:

Bushra aslam from uttam, Ghaziabad

Class : Class 5

Bb

Ans 2:

ANSHUL GAJJAR from PODAR INTERNATIONAL SCHOOL, AHMEDABAD

Class : Class 3

D

Ans 3:

Aneesh Balaji from BVBARR school, Hyderabad

Class : Class 4

d

Ans 4:

Advika Narkar from Vibgyor High Airoli, Navi Mumbai

Class : Class 4

B

Ans 5:

Aneesh Balaji from BVBARR school, Hyderabad

Class : Class 4

b

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Ujjayan Pal from Don Bosco School, Agartala

Subject :NSO Class : Class 10

An object is placed at a distance of 45 cm from a converging lens of focal length 30 cm. A convex mirror of radius of curvature 40 cm is to be placed on the other side of lens so that the object coincides with its image. Find the position of the mirror from the lens.

A 50 cm
B 60 cm
C 90 cm
D 30 cm

How

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Ayushree Barman from Sri Sri Academy, Kolkata

Subject :NSO Class : Class 5

Sonal wanted to study the effect of various factors on the rate of evaporation. For this, she carried out the experiment under four different sets of conditions as shown in the table.

Which two sets should she use to compare the effect of temperature on the rate of evaporation?

ASet P and Set S
BSet Q and Set S
CSet Q and Set R
DSet P and Set R

Can someone please explain how to do this?

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Saanvi yadav from Saanvi yadav, Ghaziabad

Subject :NSO Class : Class 5

Read the given passage and fill the blanks with correct option.
1 is also called black gold. It is formed from the remains of dead organisms in the sea. It cannot be used in its natural state and is refined and turned into 2, 3, 4, etc.

	1	2	3	4
A	Coal	Peat	Lignite	Lubricants
B	Petroleum	Lignite	Peat	Wax
C	Coal	Bituminous	Anthracite	Kerosene
D	Petroleum	Petrol	Diesel	Wax

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Ans 1:

KRITHYA GUPTA from LOTUS VALLEY INTERNATIONAL SCHOOL, NOIDA

Class : Class 6

Ans 2:

KRITHYA GUPTA from LOTUS VALLEY INTERNATIONAL SCHOOL, NOIDA

Class : Class 6

Ans 3:

Anirudh from Modern senior secondary school , CHENNAI

Class : Class 5

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