National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 6

Ans 2:

Class : Class 8
It can form both real as well as virtual image. It depends on the adjustment of the concave mirror.

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Subject :NSO    Class : Class 5

Select the correct statement out of the following.

ASandy soil needs regular addition of fertilisers as it holds a larger amount of water.
BLoamy soil has good qualities of both sandy and clayey soil and thus is most suitable for pottery.
CClayey soil develops cracks in hot weather causing harm to the roots of plants, thus is not suited for agriculture.
DThe water holding capacity is highest in clayey soil and lowest in loamy soil.


Ans 1: (Master Answer)

Class : Class 1

C

Sandy soil has poor water holding capacity. Clayey soil is good for pottery. Loamy soil has average water holding capacity, and is lowest in sandy soil.

 


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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
hey you dumbo guy don't you know that I am going to I S R O in my summer vacation

Ans 2:

Class : Class 6
Seals are end other ms and maintains a constant internal temperature.Whereas toads body temperature fluctuates according to the ambient temperature.Option (C) is correct.

Ans 3:

Class : Class 5

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Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Class : Class 1

D


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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
c)Grasshopper,Frog

Ans 2:

Class : Class 5
c

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Subject :NSO    Class : Class 5

A ball of mass ‘m’ was dropped from height ‘h’ on 3 different planets X, Y and Z one at a time. The given graph shows the comparative account of time taken by the ball to reach the surface of these planets when dropped from the same height.Which of the following holds true regarding this?


AThe ball will weigh heaviest on planet X and lightest on planet Y.
BIt will be easier to lift a load on planet X as compared to planets Y and Z.
CThe layer of atmosphere is most likely to be absent on planet Y but present on planets X and Z.
DBoth A and C


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Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Class : Class 1

C

Stone pebbles have spaces between them, which allow air and water to seep through and reach the roots. This will help the trees grow better.


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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:

Class : Class 5
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:

Class : Class 4
a and d are correct

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Subject :NSO    Class : Class 6

Read the given statements and select the correct option.
Statement 1 : Rubber and plastic are used for covering electrical wires, plug tops and switches.
Statement 2 : Rubber and plastic are insulators.

ABoth statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true but statement 2 is false.
DBoth statements 1 and 2 are false.


Statement 2 is the reason not explanation.

Ans 1: (Master Answer)

Class : Class 1

A


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Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Class : Class 1

B
Citrus fruits are excellent sources of vitamin C. They can prevent diseases like scurvy and also help in curing common cold.


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