National Science Olympiad Forum By SOF Olympiad Trainer

User Forum

Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
It will A because earth got 75% of water and it is 3/4 of it.

Ans 2:

Class : Class 6
It will A because earth got 75% of water and it is 3/4 of it.

Ans 3:

Class : Class 6
3/4th

Ans 4:

Class : Class 7
answer is 3 /4th

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 6
b

Ans 2:

Class : Class 4

Ans 3:

Class : Class 5
b

Ans 4:

Class : Class 5
B because in the first statement,if the grass population will decrease,rabbit population will also decrease as the rabbit exclusively feeds on the grass population and wolf exclusively feeds on the rabbit population.In the second statement,if the tiger population will increase,the rabbit population will decrease as the tiger exclusively feeds on the rabbit population and wolf exclusively feeds on the rabbit population.In the third statement,if the deer population will decrease,the wolf population will decrease as wolf feeds on the deer population.In the fourth statement,if the rabbit population will increase,the wolf population will also increase as wolf feeds on the rabbit population.

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 3

Ans 2:

Class : Class 7
Option A says involuntary muscles are controlled by brain. It is correct as medulla controls all our involuntary actions. Option B and C are correct as the cardiac muscles are also called as smooth muscles, so statement d is incorrect as the muscles present in our arms and legs are called skeletal or voluntary muscles

Ans 3:

Class : Class 4
d

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 6
b is the correct answer.

Post Your Answer

Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

Post Your Answer

Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
because the numbers on the opposite faces of a dice always add up to 7. and 5+2=7

Post Your Answer

Subject :NSO    Class : Class 1

Ans 1:

Class : Class 3
Ans: C

Post Your Answer

Subject :NSO    Class : Class 4

Ans 1:

Class : Class 6

Ans 2:

Class : Class 5
Answer should be D because equator is not slanting but if we mix equator and axis of the earth it will be criss crossed.

Ans 3:

Class : Class 4

Ans 4:

Class : Class 4
A as D shows criss crossed lines and equator isn't like that

Ans 5:

Class : Class 8
(MASTER ANSWER) NONE OF THESE SHOULD BE THE ANSWER

Post Your Answer

Subject :NSO    Class : Class 4

Some children wanted to find out how overcrowding can affect plant growth. They took four pairs of plants, A, B, C and D, as shown here and kept them at the same location. Each pot is given the same amount of water each day. Which pair of plants will give the correct result of their experiment?

A
B
C
D


in option C the amount of soil is the same but in the first pot there are less flowers and in the other pot there are more flowers and they both havegood soil

Ans 1:

Class : Class 4

Ans 2:

Class : Class 5
my C and D are same

Ans 3:

Class : Class 5
C

Ans 4:

Class : Class 4
c is right

Ans 5:

Class : Class 4

Ans 6:

Class : Class 4
c answer is corect

Ans 7:

Class : Class 5
the options C and D are same

Ans 8:

Class : Class 4
C is the anwser

Ans 9:

Class : Class 8

Ans 10:

Class : Class 4
C is the anwser

Ans 11:

Class : Class 4
Dear friends, see the question and the options clearly.As they have said in the question, the experiment is on how overcrowding affects plant growth.For that, the conditions in which the plant(s) are growing should be the same. That means that the amount of sunlight, amount of water, amount of soil and condition of soil should be the same, whereas the number of plants growing in one pot, should not..As we are assured in the question, they are already giving the same amounts of sunlight and water to the plants.We only have to see that the amount and condition of soil is the same, and that, my friends, is only in option 'C'.So, that i.e option 'C', is the correct answer.

Ans 12:

Class : Class 5
Answer should be C because good soil means soil having essential nutrients and poor soil means the soil which is not having essential nutrients.In the option C,the checking of soil is by purity.In option D,the soil amount is different.

Ans 13:

Class : Class 5
C

Post Your Answer

Subject :NSO    Class : Class 4

The given graph is plotted according to the recordings of an experiment to find out the effect of temperature on the rate of photosynthesis in an aquatic plant. Based on the given graph, select the correct option.


A Photosynthesis occurs best at 35°C.
B No photosynthesis takes place at 5°C and 45°C.
C The volume of oxygen collected keeps increasing with increasing temperature.
D Volume of oxygen collected at 15°C is higher than that collected at 40°C temperature.


oxygen is not taken by plants during photosynthesis

Ans 1:

Class : Class 6

Ans 2:

Class : Class 5
* Harsh are you mad , the volume of oxygen collected at 15 degree Celsius is lower than the volume of oxygen collected at 40 degree Celsius *

Ans 3:

Class : Class 4

Ans 4:

Class : Class 3
the answer is A

Ans 5:

Class : Class 5
the answer can be a and d

Ans 6:

Class : Class 5
Answer is A because the straight line shows in which temperature photosynthesis occurs best.

Ans 7:

Class : Class 5
the answer can be both a and photosynthesis happen best at 35 degree cand the volume of oxygen collected in 15dc is more than 45dc.

Ans 8:

Class : Class 5
Option ( A ) is correct because the graph shows that Photosynthesis best occurs at 35 degree Celsius

Ans 9:

Class : Class 3
I agree with harsh

Ans 10:

Class : Class 4

Post Your Answer