National Science Olympiad Forum By SOF Olympiad Trainer

aditya apurva from DAV public School, Duttnagar

Subject :NSO Class : Class 9

Refer to the given figure and select incorrect statement regarding it.

A Site 1 has higher alpha diversity than site 2.
B Region Y has higher beta diversity than region X.
C Region X has high alpha diversity, lower beta diversity but higher gamma diversity than region Y.
D Region Y has lower alpha diversity, higher beta diversity and higher gamma diversity than region X.

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aditya apurva from DAV public School, Duttnagar

Subject :NSO Class : Class 9

Which of the following is an incorrect match of phylum, type of coelom present in it and a characteristic feature?

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

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Ans 1:

Chaitanya Gawade from JPS, Pune

Class : Class 9

C

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from Gcis,

Subject :NSO Class : Class 5

Which of the following causes soil erosion?

AEmbankment, wind, water
BWind, water, overgrazing
CAfforestation, overgrazing, wind
DWind, water, terrace farming

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Ans 1:

from , rajahmundry

Class : Class 2

Ans B

Ans 2:

Alina Chattopadhyay from Tagore International School, Vasant Vihar, New Delhi, South Delhi

Class : Class 6

But C can also be the answer as afforestation, overgrazing and wind.

Ans 3:

from , rajahmundry

Class : Class 2

Ans B

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aditya apurva from DAV public School, Duttnagar

Subject :NSO Class : Class 9

Study the given experimental set-up carefully and choose the correct observation.

I. Bubbles are produced in the beaker.
II. Air in the empty bottle contracts.
III. Water from the beaker moves up the delivery tube.

A I only
B III only
C II and III only
D None of the observations is correct.

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Ans 1:

Chaitanya Gawade from JPS, Pune

Class : Class 9

I think it's gonna be A

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aditya apurva from DAV public School, Duttnagar

Subject :NSO Class : Class 9

Read the given statements and select the correct option.
Statement 1 : If a body is thrown vertically upward from ground and air resistance is taken in account, then the time of ascent is less than the time of descent.
Statement 2 : Air resistance opposes the motion of the body.

A Both statement 1 and statement 2 are true and statement 2 is the correct explanation of statement 1.
B Both statement 1 and statement 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 Statement 1 is false but statement 2 is true.

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Ans 1:

Harshitha Prakash from Kola Perumal Chetty Vaishnav Sr. Sec. School, Chennai

Class : Class 9

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Kushal from Chirec, Hyderabad

Subject :NSO Class : Class 6

The shadow below a tree has bright spots in it because _______.

ALeaves attract light
BThe light bends around the leaves to form circular spots
CThe gaps between the leaves act as pin holes
DLeaves reflect light

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Ans 1:

Falguni from Navkis, Bangalore

Class : Class 7

Maybe C

Ans 2:

ASHISH K DIXIT from JASPAL KAUR PUBLIC SCHOOL, NEW DELHI

Class : Class 7

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Kushal from Chirec, Hyderabad

Subject :NSO Class : Class 6

The given figure shows a light bulb connected to a cell. Which of the following shows the energy changes that take place when a bulb glows?

AChemical energy → electrical energy → heat energy → light energy
BChemical energy → electrical energy → light energy → heat energy
CElectrical energy → chemical energy → light energy → heat energy
DElectrical energy → chemical energy → heat energy → light energy

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Ans 1:

Pratheek from Null, Null

Class : Class 4

Why exactly is option B wrong? Please explain.

Ans 2:

Shantaneel Sarkar from Delhi Public School, Nagpur

Class : Class 6

Option A is correct

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Keratin from Chrysalis High, Bangalore

Subject :NSO Class : Class 7

Read the statements carefully and mark the correct option.

Statement 1 : Specific heat capacity is the cause of formation of land and sea breeze.

Statement 2 : The specific heat of water is more than land.

(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.
I believe the answer is A. The specific heat capacity difference between land and water results in land and sea breezes. Water has a high specific heat capacity, so to raise one unit of mass by 1degree celsius it takes more heat than land which has a relatively low specific heat capacity. Both land and sea get the same amount of sunlight( heat) so water takes more time to raise its temperature than land does. This results in breezes with further logic as you know.

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Anurag Anand from Surendranath centenary school , Ranchi

Subject :NSO Class : Class 5

Study the given table and select the incorrect option regarding P, Q, R and S.

A P could be an animal that has six legs, is oviparous and has many stages in its life cycle.
B Q and S are warm blooded animals where Q is always oviparous and lacks teeth whereas S may be viviparous and possesses teeth.
C R could be a cold blooded, oviparous, aquatic animal like seal or arowana.
D P could be moth, Q could be nightingale, R could be Scoliodon and S could be pangolin.

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Ans 1:

TADDRISH AICH from ADAMAS INTERNATIONAL SCHOOL, KOLKATA

Class : Class 7

Ans 2:

Mukta Pundir from ,

Class : Class 7

Ans 3:

DIPTANGSU PARBAT from SOUTH POINT HIGH SCHOOL, Kolkata

Class : Class 7

Ans 4:

Prisha Shah from Euroschool Airoli, Mumbai

Class : Class 6

Ans 5:

Anhad A from Chrysalis, Bangalore

Class : Class 7

Ans 6:

Amal Amzath Ali from jss international school, dubai

Class : Class 7

Ans 7:

Navya GUPTA from dps noida, Noida

Class : Class 3

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Spandan Pradeep Pathare from Takshila school , Ahmednagar

Subject :NSO Class : Class 7

Which coil will make the strongest electromagnet for a given flow of current?

AA 10 cm coil with 100 turns.
BA 5 cm coil with 200 turns.
CA 10 cm coil with 200 turns.
DA 20 cm coil with 200 turns.

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Ans 1:

AISHA from K.V.No.-1,A.F.S.,SEC.-14, GURUGRAM

Class : Class 10

B

Ans 2:

Arav saraf from lotus valley international school, NOIDA

Class : Class 7

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