National Science Olympiad Forum By SOF Olympiad Trainer

from ,

Subject :NSO Class : Class 2

Read the above conversation and select the correct option regarding it.

AMohit gave correct explanation of Ritu's statement.
BBoth Ritu and Mohit made incorrect statements.
CBoth Ritu and Mohit made correct statements.
DOnly Ritu made correct statement.

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Ans 1:

Sanaya pankule from Bvm, Nagpur

Class : Class 3

How can silk keep cool

Ans 2:

Prathyush from Greenwood High Bannerghatta, Bangalore

Class : Class 7

Ans 3:

Yug from Vibgyor, Pune

Class : Class 3

Ans 4:

Yug from Vibgyor, Pune

Class : Class 3

Please explain this question

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Sourav Jena from ODM public school , BHUBANESWAR

Subject :NSO Class : Class 5

do any body knows what is pistil

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Sourav Jena from ODM public school , BHUBANESWAR

Subject :NSO Class : Class 5

do any body knows what is pistil

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from kalyan, Kalyan

Subject :NSO Class : Class 5

Mayank carried out an experiment as shown below to see how fast water flows out through different soil types in a filter funnel.

He collected soil from three different locations X, Y and Z. For each soil sample, 100 mL of water was poured into the filter funnel. He counted the drops of water that passed through the soil and into the beaker below, in one minute. He tabulated his results as shown below.

Which of the following statements is correct based on the results tabulated by him?

AWater lily will grow best in soil type Y and cactus will grow best in soil Z.
BWater lily will grow best in soil type Z and banyan plant will grow best in soil X.
CSoil Z is found in deserts and hill tops.
DSoil Y has lot of humus.

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Ans 1:

Sourav Jena from ODM public school , BHUBANESWAR

Class : Class 4

Ans 2:

Parijaat waghmare from Centre point school international, Nagpur

Class : Class 5

Ans 3:

Samanyu from NPSI, Singapore

Class : Class 5

Ans 4:

DEVAANGANA SARDAR from G.D. Birla Centre for Education, Kolkata

Class : Class 7

You

Ans 5:

Karun from Kendriya vidhyalaya, Chennai

Class : Class 5

Admin please give solution for this question.

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Riya Nambiar from The Sanskaar Valley School, Bhopal

Subject :NSO Class : Class 4

Which phase of Moon is shown by 'X' in the given figure?

AFull
BGibbous
CCrescent
DNew

The sun's position should be shown to make the question clear. How does one know the shaded portion is the visible moon or the white portion?

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Ans 1:

ishaan from BJM carmel Academy, Chandrapur

Class : Class 7

X should be crescent not the gibbous , please check and correct your answer.

Ans 2:

ishaan from BJM carmel Academy, Chandrapur

Class : Class 7

Ans 3:

vineet8026@gmail.com from dps, Doha

Class : Class 1

C

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Kushal from Chirec, Hyderabad

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.

A 1 and 2
B 3 and 5
C 4 and 5
D 3 and 4

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Ans 1:

Panchami J from St Marys International School, Chikmangalore

Class : Class 6

ans:2

Ans 2:

Panchami J from St Marys International School, Chikmangalore

Class : Class 6

3 and 5

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Kushal from Chirec, Hyderabad

Subject :NSO Class : Class 6

If the first three letters of the word Comprehension are reversed, then the last three letters are added and then the remaining letters are reversed and added, then which letter will be exactly in the middle?

AH
BN
CR
DS

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Ans 1:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore

Class : Class 9

Ans 2:

Ashitha from GTAVM, Chennai

Class : Class 10

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Avik Bhadra from Nava Nalanda, Kolkata

Subject :NSO Class : Class 7

How olympiad help us in future

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Dev Rawat from R D Rajpal School, New Delhi

Subject :NSO Class : Class 8

Fill in the blanks with the most appropriate option.
If a guitar string is pulled strongly, its amplitude of vibration (i) and the note heard is (ii). If it is pulled lightly, its amplitude of vibration (iii) and the note heard is (iv).

	(i)	(ii)	(iii)	(iv)
A	Increases	Louder	Increases	Louder
B	Decreases	Softer	Decreases	Softer
C	Increases	Louder	Decreases	Softer
D	Decreases	Softer	Increases	Louder

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Ans 1:

Student from School, City

Class : Class 8

The answer is C

Ans 2:

Utkarsh Jetly from g, ggn

Class : Class 9

The answer is C

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Dev Rawat from R D Rajpal School, New Delhi

Subject :NSO Class : Class 8

Read the given paragraph and answer the following questions.
Two metal rulers of lengths 30 cm and 60 cm are kept in such a manner that a 30 cm ruler extends about 15 cm over the edge and a 60 cm ruler extends about 30 cm over the edge. Both the ends are flicked. Which of the following statements is correct regarding this?
(i) The metal ruler of length 30 cm is able to vibrate slower.
(ii) The metal ruler of length 30 cm produces a high pitch sound.
(iii) The metal ruler of length 60 cm is able to vibrate faster.
(iv) The metal ruler of length 60 cm produces a low pitch sound.

A Only (i) and (iii) are correct.
B Only (ii) and (iv) are correct.
C Only (i) and (iv) are correct.
D Only (ii) and (iii) are correct.

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Ans 1:

Vihaan Nair from Ambassador School, DUBAI

Class : Class 8

Synopsis and solution are completely opposite

Ans 2:

NAMAN HARITASH from DPS DLF CITY, GURGAON

Class : Class 9

synopsis says something different than the solution

Ans 3:

Ashmi Narkar from The Shishukunj International School, Jhalaria Campus, Indore

Class : Class 9

Ans 4:

Ahdiya Sharik from St Thomas public school, Trivandrum

Class : Class 8

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