National Science Olympiad Forum By SOF Olympiad Trainer

User Forum

Subject :NSO    Class : Class 9

Read the given statements and select the correct option.
Statement 1 : A man carrying a bucket of water and walking on a rough level road with a uniform velocity does no work while carrying the bucket.
Statement 2 : The work done on a body by a force (F) in giving it a displacement (S) is defined as W = . = FS cos , where is the angle between vectors and .

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.


Please give the solution

Post Your Answer

Subject :NSO    Class : Class 8

The given figure represents the location of various endocrine glands in human body.

Identify the glands marked as P, Q, R, S and T and select the incorrect statement regarding these.

A Gland P secretes the hormone thyroxine, which regulates growth and metabolism.
B Gland Q secretes the hormones corticosteroids and adrenaline, which regulate breathing, heart rate, carbohydrate metabolism and mineral balance.
C Glands S and T secrete the hormones which control secondary sexual characters in females and males respectively.
D Gland R secretes the hormone insulin, whose increased concentration leads to diabetes.


i think b and d both are correct

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

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.


Post Your Answer

Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Class : Class 1

B

Blood, Heart and Blood vessels are all parts of the Circulatory system. Similarly, Kidneys, Lungs and Skin are organs of Excretory system.


Ans 2:

Class : Class 3
b

Post Your Answer

Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3

Ans 2: (Master Answer)

Class : Class 1

B

Option A and C has correct statements and option B has incorrect statement. Bird Y can fly. It can be woodpecker, which has feet similar to parrot. Bird X can fly as well as swim. It cannot be the black and white coloured bird found at poles, as it cannot fly.Bird Z runs fast. It can be ostrich that lays largest egg in the world.

 


Post Your Answer

Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Class : Class 1

C


Post Your Answer

Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
The answer is option B. We can see that the difference between w's height (3) and x's height (7) is the highest as compared to others. Therefore the moving ball gained maximum speed at X

Ans 2:

Class : Class 7

Ans 3:

Class : Class 7
Oh sorry! The reason is that at X, the ball traveled most distance in less time as compared to other.. That's the reason that the ball has greatest avg. speed at X

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
The correct answer is: D

Ans 2:

Class : Class 4

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
all are correct

Post Your Answer

Subject :NSO    Class : Class 5

Latika took a stem of Balsam plant having leaves and flowers, and placed it in a glass of water. She mixed some red ink in the water. After some time, she observed some red stripes on the leaves, flowers and stem. Which function of plant is she trying to test?

AThe stem carries water and minerals to different parts of the plant.
BThe stem absorbs minerals and water from the soil.
CThe stem transports food prepared in the roots to different parts of the plant.
DThe stem grows in the direction of light.


Ans 1: (Master Answer)

Class : Class 1

A


Post Your Answer