National Science Olympiad Forum By SOF Olympiad Trainer

User Forum

Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Class : Class 1
The correct answer is C.

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7

Ans 2:

Class : Class 5
Ans is A because lungs send oxygen-rich blood to the heart and this oxygen-rich blood is sended to all body parts and the carbondioxide-rich blood goes back to the heart from the body this carbondioxide-rich blood is sended to the lungs.

Post Your Answer

Subject :NSO    Class : Class 7

Read the given passage.
In a flower, produces pollen grains. Pollen grains are deposited on of pistil. carries male gametes to the ovule. Fusion of male and female gametes is called. After fertilisation, develops into fruit and develops into seed. Select the correct option which fills the blanks with atleast three correct answers.

A2-Style, 4-Fertilisation, 5-Ovary
B1-Anther, 3-Pollen tube, 6-Ovule
C2-Stigma, 3-Filament, 5-Ovary
D1-Anther, 2-Stigma, 4-Pollination


will anyone tell me where is the 4th blank? and what is wrong in option a

Ans 1:

Class : Class 7
4 th blank will be filled with fertilisation correct ans is b Pollen grains are deposited on stigma and not style

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

Post Your Answer

Subject :NSO    Class : Class 3

Read the given statements and select the correct option regarding the subject of discussion.
Sanjay : Railways involve high construction and maintenance cost.
Kunal : A few states of India lack a good railway network.
Amit : The construction of railways is very difficult and costly in flat land whereas it can easily be done in mountainous region.
Rajeev : Areas with less industrial development cannot compensate the cost of construction of railways , hence have less railway network.

A Only Sanjay and Amit are correct.
B Amit and Rajeev gave the reasons of Kunal’s statement.
C Sanjay and Rajeev gave the reasons of Kunal’s statement.
D Amit gave the explanation of Sanjay’s statement.


I like this question 👍

Ans 1:

Class : Class 5
C

Ans 2:

Class : Class 3

Ans 3:

Class : Class 3
c is the ans

Ans 4:

Class : Class 4

Post Your Answer

Subject :NSO    Class : Class 3

Ans 1:

Class : Class 5
D

Ans 2:

Class : Class 5
A

Ans 3:

Class : Class 3
D

Post Your Answer

Subject :NSO    Class : Class 7

Read the given data and select the correct option for the following questions.
Raman carried out an experiment to find out how fast water can pass through four different types of soil. He put each type of soil in four pots with equal sized holes at the base and placed separate dishes at their bottom to collect water. He poured water in them one by one, and used a stopwatch to record the time taken for water to reach the level he had marked same in each dish. His recording is given in the table as shown below.


What factors should Raman keep the same to ensure a fair test?
(i) The amount of soil
(ii) The size of the pot
(iii) The shape of the dish
(iv) The amount of water

A (iii) and (iv) only
B (i) and (ii) only
C (ii), (iii) and (iv) only
D (i), (ii), (iii) and (iv)


How can it be a fair test if the amount of water varies

Ans 1:

Class : Class 7
i think amount of water also nedd

Ans 2:

Class : Class 7
I feel that it is D

Ans 3:

Class : Class 7
shape of dish also should be included. Amount of water poured doesnt matter as long as you are collecting equal volume in all dishes. Hence similar dishes is important.

Ans 4:

Class : Class 8
The amount of water also matters right

Post Your Answer

Subject :NSO    Class : Class 6

A potter shapes pots out of clay (Process 1). He then bakes the pots in an oven (Process 2). Which of the following statements is correct?

A Process 1 is a reversible, physical change while process 2 is an irreversible, physical change.
B Process 1 is an irreversible, physical change while process 2 is an irreversible, chemical change.
C Process 1 is a reversible, physical change while process 2 is an irreversible, chemical change.
D None of these.


Is it A or C?

Ans 1:

Class : Class 6
A is the correct answer

Ans 2:

Class : Class 6
C because we can get clay back from a wet pot by smashing it,but once it heats up, it dries the clay and makes it stone hard.

Ans 3:

Class : Class 7
c is the correct answer

Post Your Answer

Subject :NSO    Class : Class 7

A student took an iron rod and a wooden rod and wrapped each of them in a piece of paper. These were then heated as shown. It was found that the paper around the iron rod does not burn whereas the one around the wooden rod catches fire. It is because


A Candle, in case of iron rod, is nearer to the paper
B Wood being a bad conductor of heat, takes away all the heat
C Iron being a good conductor of heat, conducts away the heat given to the paper
D Paper, in first case, is thicker.


could someone please explain the answer

Ans 1:

Class : Class 7
ans is option C

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
jk kj;

Ans 2:

Class : Class 5
Not kerwa its kewra. It is an extract that is distilled from the flower of the Pandanus plant. Kewra water is very similar to rosewater. It is used to flavour South Asian cuisine.

Post Your Answer