National Science Olympiad Forum By SOF Olympiad Trainer - Page 710

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7
Sun 's surface is about 6000 degrees celcius and blue star is 28000 degrees celcius so to find the answer 28000 -6000 which equals to 22000degrees celcius is blue star hotter than Sun .

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
first of all the answer itself is wrong even if its B shouldn't be q repelling p not vice versa

Ans 2:

Class : Class 6
Tricky

Ans 3:

Class : Class 10
B is the answer because like poles repel.

Ans 4:

Class : Class 10
the fig is wrong because the in the fig there should be repeltion and they have given attraction.

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8

Ans 2:

Class : Class 8

Ans 3:

Class : Class 8
Anybody has an explanation?

Ans 4:

Class : Class 6
Landfills pollute land and water so they are located on the outskirts of the city

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 7

Ans 2:

Class : Class 4
I’m saying the same term of Anush nikam

Ans 3:

Class : Class 3
Its a Mosquito. It sucks blood. The answer is A.

Ans 4:

Class : Class 4

Ans 5:

Class : Class 6
D

Ans 6:

Class : Class 4
C'mon . In correct answer they are showing B and in solution they are showing A . I mean , at least somebody should check the system for errors

Ans 7:

Class : Class 3
The correct ans is D

Ans 8:

Class : Class 3
It’s mosquito..it sucks blood so answer is A

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5
answer is D

Ans 2:

Class : Class 7
d correct ans

Ans 3:

Class : Class 1

Ans 4:

Class : Class 4
Answer is = D

Ans 5:

Class : Class 5
no c is correct ans

Ans 6:

Class : Class 7
a c d are correct

Ans 7:

Class : Class 5
D

Ans 8:

Class : Class 5
they give two answer correct and but one of the two are the right answers

Ans 9:

Class : Class 6
ans is d

Ans 10:

Class : Class 4
The answer is {D}

Ans 11:

Class : Class 4
P is the molten part made up of nickel and iron(p is not molten). R is the hottest part of Earth which is solid( P is the hottest part of Earth which is solid).Q is connected to surface with the help of volcanoes( R actually has magma in it ). Minerals and oil deposits are found in the part S. and option D is only corect

Ans 12:

Class : Class 8
Class:Class:Class:VERY HARD

Ans 13:

Class : Class 5
ans is d

Ans 14:

Class : Class 1
I do not think that all answers and words of synopsis is correct

Ans 15:

Class : Class 6

Ans 16: (Master Answer)

Class : Class 1

Ans 17:

Class : Class 8
Correct option is D because mineral deposits are found on the crust of the Earth

Ans 18:

Class : Class 5
P is made up of iron so a is wrong

Ans 19:

Class : Class 8
A and D. are the correct answer

Ans 20:

Class : Class 9
D drives me crazy

Ans 21:

Class : Class 6
answer is d because core is innermost layer of earth so it could be made up of nicel and iron

Ans 22:

Class : Class 6
ans d

Ans 23:

Class : Class 7
No, the inner core is actually made up of iron and nickel.

Ans 24:

Class : Class 7
ANSWER IS 'D'

Ans 25:

Class : Class 7
The answer is D

Ans 26:

Class : Class 7
sof is dumb nearly all answers are given wrong

Ans 27:

Class : Class 5
you all are mads. D , A are correct options

Ans 28:

Class : Class 8
you are correct it doesnt update it self every year

Ans 29:

Class : Class 7
D

Ans 30:

Class : Class 5
D

Ans 31:

Class : Class 6
D

Ans 32:

Class : Class 3
you fools i found the correct answer d

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 5

Ans 2:

Class : Class 6
I think the answer should be b as after a forest gets destroyed by a forest fire ,new trees will grow as the remain of the trees will decompose and make the sol fertile.

Ans 3:

Class : Class 9

Ans 4:

Class : Class 6
the answer is B.

Ans 5:

Class : Class 6
B should be the correct answer

Ans 6:

Class : Class 5
The correct answer is Bthis time I think SOF is wrong

Ans 7: (Master Answer)

Class : Class 1

Ans 8:

Class : Class 9
I think the answer is B

Ans 9:

Class : Class 8
a is correct because there willbe soil erosion without trees

Ans 10:

Class : Class 9
Actually, forest fires lower the level of nitrogen in the soil. Since nitrogen quantities in the soil is extremely important for plant growth, lowered level of nitrogen is a big barrier in plant growth

Ans 11:

Class : Class 9
I think B is correct option as ash acts as a fertilizer for plants (even if in small quantities). Master Answer (Admin, Revisewise) EXPLAIN the answer to all of us.

Ans 12:

Class : Class 5
The question and choices given are a bit tricky. The correct answer is A because the language of (iv) is deceptive and says "new trees will grow quickly to replace the burnt ones". You have to understand that "new trees" won't grow quickly, you can only sow small plants not trees.

Ans 13:

Class : Class 5
It is certainly B as ashes of any organic matter makes soil fertile.

Ans 14:

Class : Class 7
BBBB IS THE ANSWER

Ans 15:

Class : Class 4
I think B is the correct answer

Ans 16:

Class : Class 10
I agree ,B is the correct answer

Ans 17:

Class : Class 7
THe AntwerpThe answer is (A) because if forest fire occurs there will not be any trees and soil erosion can happen and All the ashes including soil may erode and then how can it make the soil fertile

Ans 18:

Class : Class 7
SOF is giving wrong answers ! Does it ever thinks that by reading wrong things , we can get lesser marks in our exams ?!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1

Ans 19:

Class : Class 5
BBBBBBBBBBBBBBBBBB IT IS THE CORRECT ANSWER I AGREE WITH THE OTHERS

Ans 20:

Class : Class 5
yes B is the answer as the ash contains minerals from the other trees.. i agree that the process of nitrogen fixation will make the soil fertile.........

Ans 21:

Class : Class 5
B B B B B B . B B B B B B BB BB B B B B B . IS THE ANSWER

Ans 22:

Class : Class 7

Ans 23:

Class : Class 5

Ans 24:

Class : Class 5
How ??? It should be b.As ash is an organic matter. the process of nitrogen fixation will make the soil fertile . Please tell .Why????

Ans 25:

Class : Class 7
Harry?! What a fake! Harr potter is an adult!

Ans 26:

Class : Class 9
Answer is B as ash is an organic

Ans 27:

Class : Class 6
Come on Snigdha! The CORRECT ANSWER IS (B)! Ash makes soil fertile 'cause it's organic , dude! How will trees not grow?(P.S.- please don't think about Ash in Pokemon. Please, don't)🤦‍♂️🤦‍♂️

Ans 28:

Class : Class 6
i think it should be B..as ash acts as a fertilizer.

Ans 29:

Class : Class 7
B is the answer!

Ans 30:

Class : Class 7
The answer should be B.

Ans 31:

Class : Class 8
B IS THE CORRECT ANSWER AS BURNING OF WASTE CROPS AFTER HARVESTING OF GRAINS IS STANDARD METHOD OF INCREASING SOIL FERTILITY

Ans 32:

Class : Class 8
Answer must be B as it is organic and increases soil fertility.

Ans 33:

Class : Class 7
I agree with Ishan as trees cannot grow very quickly...But I did B at my first attempt

Ans 34:

Class : Class 2
ddddddd

Ans 35:

Class : Class 9
B is the correct answer

Ans 36:

Class : Class 7
i think the answer should be B because the statement 'New trees will grow quickly to replace the burnt ones as the ash of the burnt trees will make the soil more fertile' is also true

Ans 37:

Class : Class 8
WHAT! B is correct, not A. The answer is B, NOT A!

Ans 38:

Class : Class 9
Ash is an organic matter so the answer should be B

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Subject :NSO    Class : Class 7

Ans 1: (Master Answer)

Class : Class 1
The correct answer is A.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8
Answer: C

Ans 2:

Class : Class 9

Ans 3:

Class : Class 5
ANSWER-C

Ans 4:

Class : Class 6
C

Ans 5:

Class : Class 5
Answer-C

Ans 6:

Class : Class 8
Answer: C

Ans 7:

Class : Class 5
answer b

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Subject :NSO    Class : Class 9

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