National Science Olympiad Forum By SOF Olympiad Trainer

Ahaan from Orchid Jalahalli , Bangalore

Subject :NSO Class : Class 1

Ali was asked about importance of non-living things. He made four statements. Select the correct one.

A They are needed by some living things to feed upon.
B Living things need a man-made, non-living thing to breathe.
C Non-living things are always required by living things to move from one place to another.
D Both (A) and (B)

View All Answers (1)

Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

A

Plants are the living things which take up nutrients from soil (non-living thing).

Submit Your Answers

Post Your Answer

AKSHAJ SRIVASTAVA from MOUNT LITERA ZEE SCHOOL, Kanpur

Subject :NSO Class : Class 8

The given diagram shows a respirometer that is used to measure gaseous exchange in pea seeds. The apparatus is maintained at a constant temperature.

Which of the following is incorrect regarding this?

AThe gas pressure in X will fall as O₂ is absorbed during respiration and CO₂ is absorbed by potassium hydroxide solution.
BThe fluid level at Y will fall to compensate the loss of pressure in X.
CThe gas pressure at X will rise as O₂ is given out by seeds and CO₂ is released by potassium hydroxide solution.
DThe fluid level at Z will rise due to loss of pressure at X.

View All Answers (2)

Ans 1: (Master Answer)

Admin from revisewise, Noida

Class : Class 1

C

Ans 2:

Navya Jain from DPS Dwarka, delhi

Class : Class 6

how is the gas pressure in x rising when even the solution says that it will fall?

Submit Your Answers

Post Your Answer

Ritabrata Das from OPJS, Angul

Subject :NSO Class : Class 6

Observe the given figures carefully.

The reversible changes. is/are:

A(1) only
B(1) and (2)
C(3) only
D(2) and (3)

View All Answers (3)

Ans 1:

Sameer Anand from ST MICHAEL'S HIGH SCHOOL, PATNA

Class : Class 8

d is correct

Ans 2:

rethish from Veltech, Avadi

Class : Class 3

Reversible changes are those changes which can be reversed back again and they can be called as temporary. Irreversible changes are those changes which can't be turned back or they're permanent changes.After burning a candle, it is not possible to restore the original candle in order to burn it again. So, (1) is an irreversible change. Extinguished candle (2) is a reversible change, because an extinguished candle can be lighted again.Melting wax (3) is also a reversible change, because the melted wax will turn to solid when it cools. It can be heated again and it will melt. And if we let it cool again, it will become solid.Options (2) and (3) are reversible changes. Hence, the right answer is Option D.

Ans 3:

GIRISHA MAHESH SHARMA from Kudilal Govindram English School, Mumbai

Class : Class 6

Submit Your Answers

Post Your Answer

Bhavya Jain from K.R Manglam World School, Ghaziabad

Subject :NSO Class : Class 5

Which of the following events will result in a decrease in the population of butterflies?
1. Increase in the population of birds
2. Increase in the supply of plant fertilisers
3. Reduction in the number of green plants
4. Increased use of insecticides by man on gardens and green belts

A1, 2 and 3
B1, 2 and 4
C1, 3 and 4
D2, 3 and 4

View All Answers (2)

Ans 1:

Archit Raj from Little ANGELS school , Munger

Class : Class 5

C

Ans 2:

Bhavya Jain from K.R Manglam World School, Ghaziabad

Class : Class 8

Submit Your Answers

Post Your Answer

Atharv salokhe from Tatyasaheb kore english academy, Warananagar

Subject :NSO Class : Class 9

A scooterist moving with a speed of 36 km h^-1 sees a child standing in the middle of the road. He applies the brakes and brings the scooter to rest in 5 s just in time to save child. If mass of the scooter and driver is 300 kg, the average retarding force on the scooter is

A6 × 10⁷ g cm s^-2
B6 × 10⁴ g m s^-2
C6 × 10⁵ kg cm s^-2
D6 × 10³ kg m s^-2

View All Answers (1)

Ans 1:

Shivam from Modern public school, Alwar

Class : Class 9

Submit Your Answers

Post Your Answer

Raksheet Shah from Swami Vivekanad International School, Mumbai

Subject :NSO Class : Class 5

There is a certain relationship between the pair of letters given on either side of : :. Identify the relationship of the first pair and find the missing term of the second pair.
ACG : DHJ : : PRV
A SYW
B WSY
C SZW
D SWY

View All Answers (0)

Submit Your Answers

Post Your Answer

AARNA Kapse from The swaminarayan school, Nagpur

Subject :NSO Class : Class 3

Match the columns and select the correct option.

Beak	Bird
(A) Short, hard and pointed	(1) Duck
(B) Long and pointed	(2) Humming bird
(C) Strong and hooked beak	(3) Pigeon
Broad and flat	(4) Sparrow
	(5) Parrot
	(6) Crane

Aa-3; b-1, 6; c-4; d-2, 5
Ba-4; b-3, 6; c-1; d-2, 5
Ca-3, 4; b-2,6; c-5; d-1
Da-2, 6; b-1; c-5; d-3, 4

No correct answer is "OPTION D"

View All Answers (5)

Ans 1:

Sia Parekh from Pawar Public School, Mumbai

Class : Class 7

Ans 2:

Priyanshi Pritam from Vibgyor High, Bangalore

Class : Class 4

correct ans is c

Ans 3:

Sia Parekh from Pawar Public School, Mumbai

Class : Class 7

Yes correct answer is C.

Ans 4:

Santina Suzanne from owis, bangalore

Class : Class 4

it it is very hard

Ans 5:

Arihant Medhi from Dps Barasat, Kolkata

Class : Class 8

Sparrow has short and broad beak.Correct A

Submit Your Answers

Post Your Answer

Kartik Chauhan from Euro school , Pune

Subject :NSO Class : Class 7

Which of the following options is correct for the object having a straight line motion represented by the graph shown in figure?

(a) The object moves with constantly increasing velocity from O to A and then it moves with constant velocity.
(b) Velocity of the object increases uniformly.
(c) Average velocity is zero.
(d) The graph shown is impossible.