National Science Olympiad Forum By SOF Olympiad Trainer - Page 709

User Forum

Subject :NSO    Class : Class 9

Ans 1:

Class : Class 9
Option D because Kinetic energy means work done. Therefore, it can be said that work is done on body or can be said mass. W = F*D(Force * Displacement). Therefore it is independent of mass.

Post Your Answer

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 .

Post Your Answer

Subject :NSO    Class : Class 6

Ans 1:

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

Ans 2:

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

Ans 3:

Class : Class 6
Tricky

Ans 4:

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

Post Your Answer

Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8
Anybody has an explanation?

Ans 2:

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

Ans 3:

Class : Class 8

Ans 4:

Class : Class 8

Post Your Answer

Subject :NSO    Class : Class 3

Ans 1:

Class : Class 6
D

Ans 2:

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

Ans 3:

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

Ans 4:

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 5:

Class : Class 3
The correct ans is D

Ans 6:

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

Ans 7:

Class : Class 7

Ans 8:

Class : Class 4

Post Your Answer

Subject :NSO    Class : Class 5

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
ans is d

Ans 2:

Class : Class 5
D

Ans 3:

Class : Class 6
D

Ans 4:

Class : Class 5
answer is D

Ans 5:

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

Ans 6:

Class : Class 9
D drives me crazy

Ans 7:

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

Ans 8:

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 9:

Class : Class 6

Ans 10:

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

Ans 11:

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

Ans 12:

Class : Class 6
D

Ans 13:

Class : Class 4
The answer is {D}

Ans 14:

Class : Class 7
ANSWER IS 'D'

Ans 15:

Class : Class 6
Correct option is D because mineral deposits are found on the crust of the Earth

Ans 16:

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

Ans 17:

Class : Class 7
a c d are correct

Ans 18:

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

Ans 19:

Class : Class 7
d correct ans

Ans 20:

Class : Class 1

Ans 21:

Class : Class 6
ans d

Ans 22: (Master Answer)

Class : Class 1

Ans 23:

Class : Class 7
The answer is D

Ans 24:

Class : Class 5
no c is correct ans

Ans 25:

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

Ans 26:

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

Ans 27:

Class : Class 5
D

Ans 28:

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

Ans 29:

Class : Class 5
ans is d

Ans 30:

Class : Class 4
Answer is = D

Ans 31:

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

Ans 32:

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

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 9
I think the answer is B

Ans 2:

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 3:

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

Ans 4:

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 5:

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 6:

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 7:

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

Ans 8:

Class : Class 7
The answer should be B.

Ans 9:

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

Ans 10:

Class : Class 5

Ans 11:

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

Ans 12:

Class : Class 7
BBBB IS THE ANSWER

Ans 13:

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 14:

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

Ans 15:

Class : Class 6
B should be the correct answer

Ans 16:

Class : Class 9
B is the correct answer

Ans 17:

Class : Class 5

Ans 18:

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

Ans 19:

Class : Class 2
ddddddd

Ans 20:

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 21:

Class : Class 9

Ans 22:

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 23:

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 24:

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

Ans 25:

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 26:

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 27:

Class : Class 7

Ans 28:

Class : Class 6
the answer is B.

Ans 29:

Class : Class 7
B is the answer!

Ans 30:

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 31:

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

Ans 32:

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

Ans 33:

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 34: (Master Answer)

Class : Class 1

Ans 35:

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

Ans 36:

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

Ans 37:

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

Ans 38:

Class : Class 4
I think B is the correct answer

Post Your Answer

Subject :NSO    Class : Class 7

Ans 1: (Master Answer)

Class : Class 1
The correct answer is A.

Post Your Answer

Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8
Answer: C

Ans 2:

Class : Class 8
Answer: C

Ans 3:

Class : Class 5
Answer-C

Ans 4:

Class : Class 9

Ans 5:

Class : Class 5
ANSWER-C

Ans 6:

Class : Class 6
C

Ans 7:

Class : Class 5
answer b

Post Your Answer