National Science Olympiad Forum By SOF Olympiad Trainer

Kalpn from Chaitnya, Kolkata

Subject :NSO Class : Class 5

Count the number of triangles in the given figure.

A20
B16
C22
DNone of these

Ans 1:

Arnav Nandan from ST PETERS COLLEGE AGRA, Agra

Class : Class 9

no it is 17 that means none of these

Ans 2:

Iraj Singh from DPS Megacity, Kolkata

Class : Class 9

Ans 3:

Khushi Aggarwal from Venkateshwar Global School, Delhi

Class : Class 5

The answer should be 16

Ans 4:

Eashta Khodke from Elpro International School Chinchwad Pune, Pune

Class : Class 8

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Lavanya Ramesh from Vidya Soudha Public School , Bangalore

Subject :NSO Class : Class 6

Two positions of a dice are shown below. When number 3 is at the top, which number will be at the bottom?

A 1
B 2
C 5
D 6

Answer is C 5

Ans 1:

Ahamed Shayaan from Sree Gokulam public school , Calicut

Class : Class 6

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ADITII S KUMAR from HOLY ANGELS' ISC SCHOOL, Trivandrum

Subject :NSO Class : Class 10

The position-time graph of a particle of mass 40 g is shown here. Which of the following statement is true about the graph?

(a) The particle receives an impulse of 8 x 10^–4 kg m s^–1 after every 1 s.
(b) The particle receives an impulse of 8 x 10^–4 kg m s^–1 after every 2 s.
(c) The particle receives an impulse of 4 x 10^–4 kg m s^–1 after every 1 s.
(d) The particle receives an impulse of 4 x 10^–4 kg m s^–1 after every 2 s.

how do we know the impulse?

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Srikar from SSRVM, Bangalore

Subject :NSO Class : Class 8

How many number of primary consumers are represented in the given food web?

AFour
BSix
CTwo
DThree

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

A

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Mohammed Najl from Credence high school Dubai, Dubai

Subject :NSO Class : Class 5

Which example is correct for the appropriate use of a scientific tool?

AA scale can be used to measure the length of pond snails.
BA graduated cylinder can be used to collect pond snails.
CA ruler can be used to measure the mass of pond snails.
DA microscope can be used to measure the weight of a pond snail.

a scale is for measuring the weight of an object.

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Ans 1:

Mohammed Najl from Credence high school Dubai, Dubai

Class : Class 5

isn't a scale used for measuring weight?

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Anagha s Karnis from vijaya vittala vidyashala, MYSORE

Subject :NSO Class : Class 7

Observe the 3-D shapes and relative sizes of the two objects as shown. How will the shadow look like when the ring and object Z are placed between the light source and the screen as illustrated ?

A
B
C
D

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Lakshya from NPS agara, Bengaluru

Subject :NSO Class : Class 4

Study the given Venn diagram and select the correct option.

	P	Q
A	Mushroom	Banyan tree
B	Mango tree	Neem tree
C	Fern	Banyan tree
D	Mango tree	Fern

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Ans 1:

Ava from trio, bangalore

Class : Class 2

Ans 2:

Ava from trio, bangalore

Class : Class 2

Ans 3:

Aditya Rai from Kv No.1 Icchanath, Surat

Class : Class 7

Ans 4: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

C

P reproduces by spores and makes its own food, so P could be fern.Q makes its own food but does not reproduce by spores, so Q could be banyan tree or neem tree.

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Shreyas V Poojary from Sri Sri Ravishankar Vidya Mandir , Bangalore

Subject :NSO Class : Class 6

Which of the following is correct food chain?

APlant ← goat ← human
BPlant → rabbit → fox → lion
CPlant → mice → moths → owl
DPlant → mice → lion → fox

the ans is Aas lions does not eat foxes

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Ans 1:

Daksh Kumar from GCIS, Bangalore

Class : Class 7

answer is A

Ans 2:

Shreyas V Poojary from Sri Sri Ravishankar Vidya Mandir , Bangalore

Class : Class 9

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priya from indian school, muscat

Subject :NSO Class : Class 4

Read the given passage and select the correct inferences from the information provided in it.
In liquids, the molecules are not packed as close together as in solids. There are spaces between the molecules. So, they can move around more freely. When sugar is dissolved in water, the sugar molecules fill these empty spaces.
Inference:
(i) When sugar dissolves in water, the volume of water increases.
(ii) Liquid has no definite shape and volume.
(iii) Liquid can flow.
(iv) When all the empty spaces between the water molecules are filled with sugar molecules, then no more sugar can be dissolved.

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

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Ans 1:

k tagore from montessori school, KURNOOL

Class : Class 3

master answer

Ans 2:

Navvi Maya KPR from Sacred Heart Matriculation Higher Secondary School, Chennai

Class : Class 7

Ans 3:

AARAV AGRAWAL from BIRLA DIVYA JYOTI, SILIGURI

Class : Class 8

the volume of water will increase when we add sugar in it...the correct answer should be c

Ans 4:

Samridh from DelhiPublicSchoolBangloreNorthCambridgeInternational, banglore

Class : Class 6

The Correct Answer is d

Ans 5:

VISHISHT S PILLAI from Bethany High School, Bangalore

Class : Class 4

The correct answer is D

Ans 6:

ANUSHKA from NOTRE DAME ACADEMY, BARH

Class : Class 9

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BHUVANESH2010 from MAYOOR PRIVATE SCHOOL, ABU DHABI

Subject :NSO Class : Class 4

Read the given passage and select the option which fills blanks correctly. Many people wear particular dress called uniform. wears white coat. Ironing of clothes after washing . clothes should be dry cleaned. Insects eat up woollen clothes, so they should be stored with .