National Science Olympiad Forum By SOF Olympiad Trainer

Harshit from OPG WORLD SCHOOL , New Delhi

Subject :NSO Class : Class 4

The given figures show the shapes of the Moon as seen from Earth on different nights.

Which one of the following figures shows the correct shape of the Moon on January 17?

A

B

C

D

Ans 1:

Rajvardhan Mane from St Mary's ICSE School, Koparkhairne, Mumbai

Class : Class 4

D

Ans 2:

adya from Radiant international school, patna

Class : Class 4

D

Ans 3:

Roy Ashmit Umeshchandra from LP SAVANI ACADEMY, SURAT

Class : Class 4

D

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Harshit from OPG WORLD SCHOOL , New Delhi

Subject :NSO Class : Class 4

Select the correct statement regarding different kinds of soils.
(i) Sandy soil is dry and light and it holds a lot of air and water.
(ii) Loamy soil is a mixture of sand and clay and is good for growing plants.
(iii) Clayey soil is formed of very fine particles and hence does not hold much of water.
(iv) Gravel is widely used in concrete.

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

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is B.

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vedant maheshwari from presidency school, kishangarh

Subject :NSO Class : Class 8

Consider the following statements (a - d) each with one or two blanks.
I. In our body, _(1)_ is the longest cell while _(2)_ is the smallest cell.
II. Cell membrane in animal cells is _(3)_
III. Mitochondria is absent in _(4)_
IV. _(5)_ are membraneless organelles of cell and are involved in synthesis of _(6)_
Select the correct option to fill any three or four blanks.

A1 - Neuron, 2 - PPLO , 4 - bacteria
B3 - Permeable , 5 - Ribosomes, 6 - proteins
C3 - Selectively permeable , 1 - Neuron, 2 - RBC
D3 - Impermeable , 4 - human RBCs , 6 - lipids

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Ans 1:

Bharati Bhase from ,

Class : Class 7

Ans 2:

Anvesh Gupta from ,

Class : Class 8

A.

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vedant maheshwari from presidency school, kishangarh

Subject :NSO Class : Class 8

Read the given conversation among three friends.

Which of them made correct statement?

ASonia and Rohan only
BRohan and Ajay only
CSonia and Ajay only
DSonia, Rohan and Ajay

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is A.

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vedant maheshwari from presidency school, kishangarh

Subject :NSO Class : Class 8

Which of these is true of mountain dwellers in relation to people residing at sea level?

AMountain dwellers have greater vital capacity and enlarged thoracic cavity
BMountain dwellers have reduced vital capacity and compressed thoracic cavity
CMountain dwellers inhale a smaller amount of air than people living at sea level
DMountain dwellers have a reduced concentration of red blood cells compared to people living at sea level.

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is A.

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Akashsiddarth from SMART MINDS ACADEMY, Chennai

Subject :NSO Class : Class 6

Anshuman pushed an inverted empty glass into a basin of water. He noted the water level in the glass at different stages and marked them.
Where would the water level inside the glass be, when the glass is dipped fully?

AP
BQ
CR
DS

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Ans 1:

Arin Gupta from DELHI PUBLIC SCHOOL, Karnal

Class : Class 6

D

Ans 2:

Sanket Kulkarni from Euroschool, Pune

Class : Class 8

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Akashsiddarth from SMART MINDS ACADEMY, Chennai

Subject :NSO Class : Class 6

Four closed beakers contain ice, water, steam, and water vapor, as shown in the given figure. Their respective temperatures are –5° C, 30° C, 115° C, and 45° C.

Aice < water < steam < water vapor
Bwater < ice < steam < water vapor
Cice < water < water vapor < steam
Dwater < ice < water vapor < steam

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Ans 1:

Pro Bro from Homeschooling , Bengaluru

Class : Class 6

Ans 2:

anahitaa Malhotra from delhi public school gandhinagar gujarat, Ahmedabad

Class : Class 4

Ans 3:

takshvi Kawale from kendriya vidyalaya bhandup , mumbai

Class : Class 6

Ans c because steam is hotter than water vapor

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Mayuresh Bhatt from MDPS Sect. 87 Faridabad, Faridabad

Subject :NSO Class : Class 3

Study the given flow chart and select the option which can fill empty spaces X, Y and Z correctly.

AX - Rice, Y - Almond, Z - Milk
BX - Rice, Y - Milk, Z - Apple
CX - Mango, Y - Wheat, Z - Rice
DX - Milk, Y - Black gram, Z - Bajra

how can you answer B

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Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

The correct answer is B because Rice gives you carbohydrates which give you energy. Similarly, Milk gives you Calcium and Apple protect you from falling ill.

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anindeeta78@gmail.com from nk bagrodia global school, New Delhi

Subject :NSO Class : Class 5

Study the description given below.

Which of the following pairs of plants can 'X' and 'Y' be?

----------X--------------Y
A Water lily-----Water lettuce
B Water hyacinth-----Water lily
C Water lettuce-----Watch hyacinth
D Water moss fern-----Water lily

No description given need explanation

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Ans 1:

from kalyan, Kalyan

Class : Class 6

Есть простая работа без вложений для всех, обращаться в телеграм @karabeitm

Ans 2:

Aarush Thakur from DPS, Gurgaon

Class : Class 6

Нужна работа? Высокий доход! Образование и опыт не требуются. Пиши в телеграм @karabeitm

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EKLAVYA GONDULE from DPS BHILAI, Bhilai

Subject :NSO Class : Class 4

Energy used by green plants to make food is __________.

A Wind energy
B Potential energy
C Chemical energy
D Solar energy

water

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Ans 1:

Nivedita Parikh from Children's Academy , Mumbai

Class : Class 4

c is definetly the correct answer.

Ans 2:

SRAVAN SHANKER from Bhavans Varuna Vidyalaya , Ernakulam

Class : Class 6

'C' is the correct answer as plants use sunlight to cook food.

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