# User Forum

Subject :NSO    Class : Class 9

Subject :NSO    Class : Class 4

## Ans 1:

Class : Class 8
My sister also says that she had same question just the name was different and she gave same answer and that time too answer was wrong. Now tell me the answer until 19.11.2019

Class : Class 8

## Ans 3:

Class : Class 4
To Ashmi Narkar-Drilling a hole into a metal sheet cause friction as,because of the friction it is able to drill in the metal sheet and make a hole in it!I hope this helped you!

Subject :NSO    Class : Class 6

Class : Class 8

Class : Class 1

## Ans 3:

Class : Class 9
Hey, the answer is C only. Because in burning of candle both melting and burning of wax is included right? Ya, so melting of wax is physical change (wax is still wax) and burning of wax is chemical change (wax turns to smoke). And both of these are irreversible. Now see an example. During Diwali we light tea lights, those small, circular candles, right? Have you ever observed it? First the wax melts into liquid wax, then if you don't blow the flame away, the wax burns away! These are CANDLES after all right? So this is how burning of candle is physical, chemical and irreversible change. This answer is written WITHOUT use of any website. Plz consider this as solution. SOF if you could add this as solution could you do that?

## Ans 4:

Class : Class 10
it is not C because burning of candle is reversible. I think answer is B

Subject :NSO    Class : Class 5

Subject :NSO    Class : Class 3

Class : Class 1

hi nandika, how can we help you? as this forum is designed to solve SOF Olympiad related questions/queries, so use this platform to clear your doubts about these topics.

thanks

happy learning.

Subject :NSO    Class : Class 5

## Ans 1:

Class : Class 5
there is no diagram

Class : Class 6

## Ans 3:

Class : Class 6
Diagram is missing in the question

## Ans 4:

Class : Class 7
What IS THIS????????????????

## Ans 5:

Class : Class 6
Yes, there is no diagram

Class : Class 5
No diagrammm???

## Ans 7:

Class : Class 5
No diagram in question

## Ans 8:

Class : Class 5
There is no diagram?

## Ans 9:

Class : Class 6
No diagram = No answer as I don't know what's the diagram

## Ans 10:

Class : Class 5
I knew that this has a glitch so I reported an error for this question

Subject :NSO    Class : Class 7

Class : Class 5

## Ans 2:

Class : Class 9
The answer is A - Bacterium, Bacillus anthracis.

## Ans 3:

Class : Class 7

Subject :NSO    Class : Class 5

Class : Class 5

Class : Class 5

Class : Class 4

Class : Class 5

Class : Class 5
Ans-B

## Ans 6:

Class : Class 5
how is digestion involuntary?!

Class : Class 5

Class : Class 7

Class : Class 5

## Ans 10:

Class : Class 3

Subject :NSO    Class : Class 5

## Ans 1:

Class : Class 7
Globallllllllllllllll warminggggggggg

Class : Class 8
cccccccccc

Class : Class 7
Global warming

## Ans 4:

Class : Class 4
nitrogen and sulphur are not greenhouse gases so NOT global warming

Subject :NSO    Class : Class 6

## Ans 1:

Class : Class 6
hey????!!!! Oh.......... Umm its me only.

Class : Class 9

Class : Class 8

Class : Class 6
Good explanation

Class : Class 9

## Ans 6:

Class : Class 6
P is protein, Q is fat, R is carbohydrate and S is vitamin C. Deficiency of proteins causes kwashiorkor whereas marasmus is caused by deficiency of proteins along with carbohydrate. Marasmus occurs in children usually in infants below the age of 1 year and kwashiorkor occurs in children.

## Ans 7:

Class : Class 7
umm............ SOF where is my solution?

Class : Class 9

Class : Class 6