National Science Olympiad Forum By SOF Olympiad Trainer - Page 669

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Subject :NSO    Class : Class 4

Ans 1:

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.

Ans 2:

Class : Class 6
b

Ans 3:

Class : Class 7
D is answer

Ans 4:

Class : Class 4
D-Foxes eat deers so 1,2 AND 3 Hence correct answer is D

Ans 5:

Class : Class 7
d

Ans 6:

Class : Class 4
WHY (B) it should be (A)ok!!GIVE EXPAINATION!!!!!!!!!PLS

Ans 7:

Class : Class 9

Ans 8:

Class : Class 7

Ans 9:

Class : Class 6
B

Ans 10:

Class : Class 6
b

Ans 11:

Class : Class 7
D SHOULD BE THE ANWSER

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 4
d

Ans 2:

Class : Class 3

Ans 3:

Class : Class 10
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

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 6
b is the correct answer.

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Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1
The correct answer is D.

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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

Ans 2:

Class : Class 7
hello Aminesh Pathak Bhaiya.*he is older than me and i am older than you

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Subject :NSO    Class : Class 1

Ans 1:

Class : Class 3
Ans: C

Ans 2:

Class : Class 1
1. Jaya said all natural things can breathe. All natural things cannot breathe. Mountain is natural but cannot breathe.2. Rati said all non living things can be moved ( they can move by themselves). No, not all living things can move. Train can move, but it can only move with human's power.3.Sonu said man made things can reproduce. No, man made things cannot reproduce so the answer is D as all of them are incorrect

Ans 3:

Class : Class 1
D

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 7
The correct answer is D because if you draw the axis and the equator, it will make a sign like a tilted x and the option that most relates to the shape we've received is option D(Master Answer)

Ans 2:

Class : Class 7
(MASTER ANSWER) NONE OF THESE SHOULD BE THE ANSWER

Ans 3:

Class : Class 9

Ans 4:

Class : Class 7
hey you inknoledgeble (SOF)

Ans 5:

Class : Class 6

Ans 6:

Class : Class 5
Awnswer is D

Ans 7:

Class : Class 5
The earth is tilted on its axis and the equator divides the earth into northern hemisphere and Southern Hemisphere. So, if we just imagine to remove the planet and just leave the axis and equator, we will get an X. To visualise take a piece of paper and rool it into a ball and draw a in the middle. Then tilt it a bit and you will get a model of the earth. Then it forms a X. So the answer is D.

Ans 8:

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 9:

Class : Class 8
A as D shows criss crossed lines and equator isn't like that

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4

Ans 2:

Class : Class 5
C is correct

Ans 3:

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 4:

Class : Class 5
my C and D are same

Ans 5:

Class : Class 7
Answer is option C.!

Ans 6:

Class : Class 4
I thought it was D. :(

Ans 7:

Class : Class 4
Ans A

Ans 8:

Class : Class 4
c answer is corect

Ans 9:

Class : Class 9
C

Ans 10:

Class : Class 5

Ans 11:

Class : Class 7
C is the anwser

Ans 12:

Class : Class 4

Ans 13:

Class : Class 9
the options C and D are same

Ans 14:

Class : Class 9

Ans 15:

Class : Class 7

Ans 16:

Class : Class 9
YAR AGAR NCO HOTA 2020 MEIN TO MAZA AATA KYON KI LAST YEAR MAIN THA WINNER

Ans 17:

Class : Class 5
Thanks so much Mohhika

Ans 18:

Class : Class 5

Ans 19:

Class : Class 6
No one will see mohhika

Ans 20:

Class : Class 7
ahana bag, in option d the soil in more plants is less and in option c the soil in both the pots are same. Just wanted to tell that you might be blind!!

Ans 21:

Class : Class 8
c is right

Ans 22:

Class : Class 5
They will see somesh

Ans 23:

Class : Class 7
C is the anwser

Ans 24:

Class : Class 5
a crowing will effect

Ans 25:

Class : Class 9
C

Ans 26:

Class : Class 7
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 27:

Class : Class 8

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Subject :NSO    Class : Class 4

Ans 1:

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 2:

Class : Class 9
* 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 5
Option a

Ans 4:

Class : Class 3
the answer is A

Ans 5:

Class : Class 4

Ans 6:

Class : Class 3
I agree with harsh

Ans 7:

Class : Class 7

Ans 8:

Class : Class 4

Ans 9:

Class : Class 4

Ans 10:

Class : Class 8
d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d d D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D D

Ans 11:

Class : Class 7
the answer is a

Ans 12:

Class : Class 5

Ans 13:

Class : Class 9
Option ( A ) is correct because the graph shows that Photosynthesis best occurs at 35 degree Celsius

Ans 14:

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

Ans 15:

Class : Class 5
the answer can be a and d

Ans 16:

Class : Class 10

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 5
Option c

Ans 2:

Class : Class 5
Answer is C because the graph is showing different levels of O2 in the atmosphere and Y has less oxygen in the atmosphere.

Ans 3:

Class : Class 7

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