National Science Olympiad Forum By SOF Olympiad Trainer

Antareep Mukherjee from New Horizon Public School, Bangalore

Subject :NSO Class : Class 7

During the formation of rain, when water vapour changes back to liquid in the form of rain drops,

A Heat is absorbed
B Heat is released
C Heat is absorbed first and then released
D There is no exchange of heat.

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Sarah Ahmad from st. mary's school, delhi

Class : Class 8

so does that mean condensation is an exothermic process?

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Antareep Mukherjee from New Horizon Public School, Bangalore

Subject :NSO Class : Class 7

Following are the precautions one must take in the case a storm is accompanied by lightning. Which one of the following statements is not correct?

A Do not take shelter under a tall tree.
B Do not take shelter inside a closed car.
C Do not take shelter under an umbrella.
D Do not take shelter under an open garage.

question is printed wrong it is said precautions not to be taken during storm please fix it

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Ans 1:

Antareep Mukherjee from New Horizon Public School, Bangalore

Class : Class 8

Ans 2:

Antareep Mukherjee from New Horizon Public School, Bangalore

Class : Class 8

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from ,

Subject :NSO Class : Class 2

Buy Skull and Bones Items at MMOexp.com

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Aarya Ranjan from Chrysalis High Varthur, bangalore

Subject :NSO Class : Class 4

Select the INCORRECT statement.

ARoughage is indigestible but helps in proper functioning of digestive system.
BEating a lot of junk food can make us put on extra weight.
CWater is not an important part of our diet.
DFruits and vegetables help us to stay healthy.

so easy

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Parth Dhondiram Gadgile from Narayana international school Loha Dist. Nanded, Parbhani

Subject :NSO Class : Class 7

A rare and expensive fibre called mohair is obtained from _____.

ACamel
BRabbit
CGoat
DSheep

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malhar thorve from city internqtional school, satara road, pune

Subject :NSO Class : Class 6

The properties of four different materials 1, 2, 3 and 4 are listed in the given wheel.
Fill in the blanks with an appropriate option.

A 1 - Glycerine, 2- Chalk, 3 - Frosted glass, 4 - Stone
B 1 - Oil, 2- Leather, 3 - Wood, 4 - Rubber band
C 1 - Vaseline, 2- Metal spoon, 3 - Cardboard, 4 - Cotton ball
D 1 - Honey, 2- Sponge, 3 - Water, 4 - Iron nail

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malhar thorve from city internqtional school, satara road, pune

Class : Class 6

cotton ball should not sink

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Krishnan V from BGSIRS, Bengaluru

Subject :NSO Class : Class 9

The given figure shows the rear wheel of a car that is moving to the right. The force which represents the frictional force acting on the rear wheel, as it moves to the right, is

AQ
BR
CP
DS

This is wrong

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Anantjit Chander from Apeejay School, Sector 15, Faridabad

Subject :NSO Class : Class 9

In a car race, car A takes 2 s less than car B and passes the finishing point with a velocity v more than the velocity with which car B passes the point. Both the cars start from rest and travel with constant accelerations of a_A = 3 m s^–2 and a_B = 2 m s^–2. The value of v is

A 2.45 m s^–1
B 4.90 m s^–1
C 7.35 m s^–1
D 9.80 m s^–1

someone please explain

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Antareep Mukherjee from New Horizon Public School, Bangalore

Subject :NSO Class : Class 7

Which of the following represents the given Venn diagram?

APets, Cats, Dogs
BHuman beings, Males, Pens
CBricks, Walls, Houses
DFemales, Mothers, Unmarried people