National Science Olympiad Forum By SOF Olympiad Trainer - Page 301

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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Class : Class 1

B

Comets are balls of ice and dust that move around the Sun in highly elliptical orbits.


Ans 2:

Class : Class 8

Ans 3:

Class : Class 7

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Subject :NSO    Class : Class 1

Ans 1: (Master Answer)

Class : Class 1

A

Plants are the living things which take up nutrients from soil (non-living thing).


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Subject :NSO    Class : Class 8

The given diagram shows a respirometer that is used to measure gaseous exchange in pea seeds. The apparatus is maintained at a constant temperature.


Which of the following is incorrect regarding this?

AThe gas pressure in X will fall as O2 is absorbed during respiration and CO2 is absorbed by potassium hydroxide solution.
BThe fluid level at Y will fall to compensate the loss of pressure in X.
CThe gas pressure at X will rise as O2 is given out by seeds and CO2 is released by potassium hydroxide solution.
DThe fluid level at Z will rise due to loss of pressure at X.


Ans 1:

Class : Class 6
how is the gas pressure in x rising when even the solution says that it will fall?

Ans 2: (Master Answer)

Class : Class 1

C


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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 8
d is correct

Ans 2:

Class : Class 3
Reversible changes are those changes which can be reversed back again and they can be called as temporary. Irreversible changes are those changes which can't be turned back or they're permanent changes.After burning a candle, it is not possible to restore the original candle in order to burn it again. So, (1) is an irreversible change. Extinguished candle (2) is a reversible change, because an extinguished candle can be lighted again.Melting wax (3) is also a reversible change, because the melted wax will turn to solid when it cools. It can be heated again and it will melt. And if we let it cool again, it will become solid.Options (2) and (3) are reversible changes. Hence, the right answer is Option D.

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 8

Ans 2:

Class : Class 5
C

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 4
correct ans is c

Ans 2:

Class : Class 7

Ans 3:

Class : Class 6
Sparrow has short and broad beak.Correct A

Ans 4:

Class : Class 7
Yes correct answer is C.

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Subject :NSO    Class : Class 7

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