National Science Olympiad Forum By SOF Olympiad Trainer - Page 34
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SWARIT JAIN from DPS Greater Noida, GREATER NOIDA
Subject :NSO    Class : Class 4

Ans 1:

Nidhesh Agarwal from Chinmaya vidyalaya, Bokaro steel city
Class : Class 4
flax is not a fibre

Ans 2:

Kriday from KDAV, Jamnagar
Class : Class 4

Ans 3:

suhana priyadarsini nayak from VELS GLOBAL SCHOOL, Bengaluru
Class : Class 5
Answer c is correct because we can find cotton hemp jute flax and wool for explanation hemp is a synthetic fibre used to make most T-shirts

Ans 4:

DivyanshuDeeyan from Dav, Bbsr
Class : Class 4

Ans 5:

srijita sen from B.J.E.M school, Bhubaneswar
Class : Class 6
Please explain what is hemp

Ans 6:

Vyom from vardham, Khach
Class : Class 4
What is hamp?

Ans 7: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C

The natural fibres hidden in the grid are WOOL, JUTE, COTTON, HEMP and FLAX.


Ans 8:

Aarnav Grover from Anand Niketan Shilaj, Ahmedabad
Class : Class 9
CThe natural fibres hidden in the grid are WOOL,JUTE,COTTON,HEMP and FLAX

Ans 9:

Aaryav Misra from Vibgyor High, Bengaluru
Class : Class 4
What is hemp?

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Radhika Gupta from Dps civil lines aligarh , Aligarh
Subject :NSO    Class : Class 4

A scientist observed a sudden increase in the number of algae in a lake over a few days. The reason behind it could be that ____________.

AWater cycle in the area got unbalanced
BElectronic wastes were being dumped in a nearby area
CA factory with heavy smoke discharge has been established nearby
DHeavy amount of chemical fertilisers were being used in a nearby field


Option d As heavy amount of chemicals fertilizers were being used in a nearby fiel

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

D


Ans 2:

KANAK PRASAD from Edify School , Tirupati
Class : Class 4

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Agriye Kamboj from ST.XAVIER SEC SE CO ed Bhopal, BHOPAL
Subject :NSO    Class : Class 4

Ans 1:

Vihaan Nair from Ambassador School, DUBAI
Class : Class 6

Ans 2:

Yashraj Namdev Deshmukh from Sahyadri English School, Loha, Nanded
Class : Class 7
C)

Ans 3: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C

 In the life cycle of butterflies etc., egg hatches to produce a young one called a larva which looks like a worm. After some days, it changes into pupa which finally turns into an adult.


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shubhavi Dhondge from NPS, Banagalore
Subject :NSO    Class : Class 4

Ans 1:

shubhavi Dhondge from NPS, Banagalore
Class : Class 8

Ans 2:

Aditya Nair from TSA, Bangalore
Class : Class 4
The correct answer is: D

Ans 3:

Aaryav Misra from Vibgyor High, Bengaluru
Class : Class 4
Doesn't hot air rise up from the land and cold air take up the hot air's place?

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shubhavi Dhondge from NPS, Banagalore
Subject :NSO    Class : Class 4

Ans 1:

SWARIT JAIN from DPS Greater Noida, GREATER NOIDA
Class : Class 8
all are correct

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Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

D


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Saathvik Sriram from euroschool whitefield, Bangalore
Subject :NSO    Class : Class 4

Mohit wants to separate a mixture of sugar, water and pebbles. Which of these separation methods should he use to separate all the three components?

AFiltration, Evaporation
BDecantation, Sublimation
CFiltration, Decantation
DEvaporation, Distillation


none of the answers is correct.In option A,through filtration,we ca seprate pebbles.After that through Evaporation,we can get sugar,but wter will get evaporated.So,we willnot get water.So option A ,B,C,D are incorrect

Ans 1:

Ashwak from Cambridge, Jalandhar
Class : Class 8
Firstly , ( Sugar and Water ) and Pebbles can be separated through Filtration Secondly , Sugar and Water can be separated by Evaporation So , the answer is Option (A)

Ans 2:

suhana priyadarsini nayak from VELS GLOBAL SCHOOL, Bengaluru
Class : Class 5
Sorry but for the explanation a and d are not correct because first we have to follow the filtration process to separate pebbles and then use evaporation process

Ans 3:

SWARIT JAIN from DPS Greater Noida, GREATER NOIDA
Class : Class 8
a and d are correct

Ans 4:

Iniyan from Indian public school, Salem
Class : Class 4
A and d are correct

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Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

C

The animal shown here is polar bear. They have a fat layer under skin and a layer of fur over it to protect them from cold.


Ans 2:

Mohhika Sharma from Delhi Public School Greater Noida, Greater Noida
Class : Class 7

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Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 4

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Ashwak from Cambridge, Jalandhar
Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Admin from revisewise, Noida
Class : Class 1

D

There two 'S' in the word 'COSMOS' so, 'COSMOS' cannot be made from the given word.


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