National Science Olympiad Forum By SOF Olympiad Trainer

TRIYA SOUMIK NATH from SYMBIOSIS PRIMARY SCHOOL, PUNE

Subject :NSO Class : Class 7

Which of the following diagrams shows the correct wind flow pattern because of uneven heating of the earth?

A

B

C

D

Yes, the correct answer is A but the direction of winds in the polar region is given quite small and is not visible properly. The order is equator i.e. 0 degree, 30 degree North and South, 60 degree North and South and the poles i.e. 90 degree.

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Pratibha Gratus from dps north, Bangalore

Subject :NSO Class : Class 4

The fur of some animals becomes thicker in the winter and is shed in the spring. These observations show how animals

A Respond to changes in the environment
B Move from place to place to survive
C Store fat for the winter
D Compete with other animals for food.

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Ans 1:

AAYANSH from New horizon scholars school, Thane

Class : Class 10

Ans 2:

Shruthi from VIBGYOR, Mumbai

Class : Class 6

Ans 3:

arjun gupta from st kabir public school, Chandigarh

Class : Class 4

A

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Tanihq Nagirkar from SNBP, PUNE

Subject :NSO Class : Class 8

Select the option that correctly identifies the given species as extinct (P), critically endangered (Q) and vulnerable (R) according to IUCN Red List.

	P	Q	R
A	Asiatic wild ass	Indian gazelle	Lion tailed macaque
B	Dodo	One horned rhinoceros	Chinkara deer
C	Passenger pigeon	Ivory-billed woodpecker	Bare-faced curassow
D	Silvery pigeon	Blackbuck	Red panda

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Sabhya Kumar from Suncity School, Gurgaon

Subject :NSO Class : Class 7

Priya categorised animals on the basis of their respiratory organs. She made three groups of four organisms each. By mistake, she put one wrong member in each group. Identify it and select the correct option.
Group I : Ladybird, Silverfish, King crab, Cockroach
Group II : Arowana, Jellyfish, Sea-horse, Climbing perch
Group III : Krait, Stork, Porcupine, Gambusia

A Silverfish in group I should be interchanged with jellyfish in group II.
B Climbing perch in group II should be replaced with pangolin.
C Ladybird in group I should be interchanged with Gambusia in group III.
D King crab in group I should be replaced with locust.

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Snehal Akolkar from vikhe patil, Pune

Subject :NSO Class : Class 4

Select the option which on unscrambling gives the name of a clothing item worn in winter.

A RFMUFLE
B CROFK
C SRTOSH
D None of these

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Ans 1:

UMANG from SPRING DALE COLLAGE, Lucknow

Class : Class 8

Answer is option A.

Ans 2:

UMANG from SPRING DALE COLLAGE, Lucknow

Class : Class 8

Answer is option A.

Ans 3:

UMANG from SPRING DALE COLLAGE, Lucknow

Class : Class 8

Answer is a

Ans 4:

UMANG from SPRING DALE COLLAGE, Lucknow

Class : Class 8

Answer is option A. MUFFLER

Ans 5:

Ridhan from SFS janakpuri, New Delhi

Class : Class 5

answer is a

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Sabhya Kumar from Suncity School, Gurgaon

Subject :NSO Class : Class 7

Study the given table and select the correct option.

	P	Q	R	S
A	Dahlia	Spirogyra	Rhizopus	Begonia
B	Yeast	Rhizopus	Spirogyra	Begonia
C	Spirogyra	Rhizopus	Begonia	Dahlia
D	Dahlia	Yeast	Spirogyra	Rhizopus

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Falguni from Navkis, Bangalore

Subject :NSO Class : Class 6

Which pair shows correct match of organism with its breathing organs?

ADolphin-lungs
BSnake-Moist skin
CEarthworm-Spiracles
DWhale-Gills

Earthworms breathe through spiracles.How can the answer be A

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Ans 1:

kpks14 from RIMT World School, Chandigarh

Class : Class 7

Answer is A Dolphin is a mammal which breaths through the lungs. Whales also have the same system Whereas, earthworm breathes through the skin.

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Sabhya Kumar from Suncity School, Gurgaon

Subject :NSO Class : Class 7

Read the given statements and mark the correct option.
Statement 1 : The ash produced by burning magnesium when dissolved in water turns China rose indicator dark pink.
Statement 2 : The ash formed is MgO which when dissolved in water forms an acidic solution.

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 but statement 2 is false.
D Both statements 1 and 2 are false.

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Falguni from Navkis, Bangalore

Subject :NSO Class : Class 6

Look at the two objects below.

From the following statements, pick out those which are true.
1. Cotton is heavier than iron.
2. Both the objects have the same volume.
3. Both the objects are solid.
4. Both the objects are waterproof.
5. Both the objects have same mass.

A1 and 2
B3 and 5
C4 and 5
D3 and 4

It has to be D

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Ans 1:

Aadhya Kumawat from Jaipur School, Jaipur

Class : Class 6

M

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SANKALP S YANAMANDRA from DELHI PUBLIC SCHOOL, SURAT

Subject :NSO Class : Class 8

Read the given statements and select the correct option.
Statement 1: Petrol condenses near the top of the fractionating column while diesel oil near the middle of the column.
Statement 2: Petrol is more volatile than diesel oil.

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.

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Ans 1:

Shreyans Mondal from Sri Chaitanya Techno School Kaggadasapura Campus 1, Bengaluru

Class : Class 10

it must be B. The altitude of condensation depends on the boiling point and not on the volatility

Ans 2:

KARTIK SHINDE from Delhi Public school Rau Indore , indore

Class : Class 4

b Is the correct ans

Ans 3:

Priyanka Sinha from National Public School International, Mysore

Class : Class 8

B

Ans 4:

PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD

Class : Class 8

Ans 5:

PARTH JAIN from DPS INDIRAPURAM, GHAZIABAD

Class : Class 8

Ans 6:

Bhagyesh Kamal from DPS, Mumbai

Class : Class 8

A

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