National Science Olympiad Forum By SOF Olympiad Trainer

User Forum

Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
Option A is correct

Post Your Answer

Subject :NSO    Class : Class 7

Read the statements carefully and mark the correct option.

Statement 1 : Specific heat capacity is the cause of formation of land and sea breeze.

Statement 2 : The specific heat of water is more than land.

(A) Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.

(B) Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.

(C) Statement 1 is true and statement 2 is false.

(D) Both statements 1 and 2 are false.
I believe the answer is A. The specific heat capacity difference between land and water results in land and sea breezes. Water has a high specific heat capacity, so to raise one unit of mass by 1degree celsius it takes more heat than land which has a relatively low specific heat capacity. Both land and sea get the same amount of sunlight( heat) so water takes more time to raise its temperature than land does. This results in breezes with further logic as you know.

Post Your Answer

Subject :NSO    Class : Class 5

Study the given table and select the incorrect option regarding P, Q, R and S.


A P could be an animal that has six legs, is oviparous and has many stages in its life cycle.
B Q and S are warm blooded animals where Q is always oviparous and lacks teeth whereas S may be viviparous and possesses teeth.
C R could be a cold blooded, oviparous, aquatic animal like seal or arowana.
D P could be moth, Q could be nightingale, R could be Scoliodon and S could be pangolin.


Post Your Answer

Subject :NSO    Class : Class 7

Post Your Answer

Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6

Ans 2:

Class : Class 6
Correct Answer is D - 5

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
Ans A When playing a musical instrument that is a closed-end air column, such as the bottles in this activity, the pitch of the note that is made depends on the length of the air column. In other words, the pitch depends on how much water has filled up the bottle and how much empty space remains. This is because the pitch of the sound we hear depends on the frequency of the sound wave that can be created within the bottle's air. The shorter the air column (that is, the shorter the height of the air in the bottle) the higher the frequency. And the higher the frequency the higher the perceived pitch. This is why the empty bottle should have produced a sound wave with a lower frequency than the others and the bottle that was nearly full (three quarters full) should have made the highest pitch.

Ans 2:

Class : Class 3

Ans 3:

Class : Class 2
Ans A When playing a musical instrument that is a closed-end air column, such as the bottles in this activity, the pitch of the note that is made depends on the length of the air column. In other words, the pitch depends on how much water has filled up the bottle and how much empty space remains. This is because the pitch of the sound we hear depends on the frequency of the sound wave that can be created within the bottle's air. The shorter the air column (that is, the shorter the height of the air in the bottle) the higher the frequency. And the higher the frequency the higher the perceived pitch. This is why the empty bottle should have produced a sound wave with a lower frequency than the others and the bottle that was nearly full (three quarters full) should have made the highest pitch.

Post Your Answer

Subject :NSO    Class : Class 6

Symptoms of two diseases are given. I. Swollen, bleeding gums, loose teeth and aching joints.
II. The patient looks pale, gets tired quickly and suffers from loss of appetite.
Identify the two diseases from the given symptoms, and select the correct option.

AI. Pellagra, II. Beri beri
BI. Scurvy, II. Rickets
CI. Beri beri, II. Scurvy
DI. Scurvy, II. Anaemia


FIRST=symptoms of scurvy,caused by lack of vitamin CSECOND=symptoms of anaemia ,caused by lack of ironbye.

Ans 1:

Class : Class 7
The answer is d

Post Your Answer

Subject :NSO    Class : Class 7

Read the given statements and select the correct option.
Statement 1: Forests prevent soil erosion.
Statement 2 : Canopy formed by crown of leaves of forest trees reduces the force and speed of raindrops.

A Both statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
B Both statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
C Statement 1 is true but statement 2 is false.
D Both statements 1 and 2 are false.


Ans 1:

Class : Class 8
statement 1:the roots of the trees of the forest hold the soil and prevent soil erosion. (true) statement 2:in forest the leaves of the trees overlap each other and form a canopy and when the rain falls on the leaves the leaves absorb the rain water and some water flows from the branches and remaining water fall on the small shrubs and it absorbs the water and the left over water is then absorbed by the soil so no floods will occur in the forests. (true) option B:statement 1 and statement 2 are true but statement 2 is not the correct explanation of statement 1

Post Your Answer

Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
Yeah,the answer is D

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
Hydroelectricity can be used in things like fans. Here , Electrical energy(Hydroelectricity)----->changes into----->Mechanical energy(fan)

Post Your Answer