National Science Olympiad Forum By SOF Olympiad Trainer - Page 271

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 9
HJK

Ans 2:

Class : Class 5
B

Ans 3:

Class : Class 9

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
*Moulting

Ans 2:

Class : Class 7
The correct answer is option B. Mounting occurs at LARVA STAGE only.

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Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Class : Class 1

A


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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 8

Ans 2:

Class : Class 8
No, you should refer to the starting point of the graph.. The temperature at the beginning is also important.. So the right answer is option B

Ans 3:

Class : Class 4
ya

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 10
C IS CORRECT ANSWER

Ans 2:

Class : Class 7

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
His image will form at 6m away from him because the distance between him and mirror is 3m so the image will form at 3m away from mirror .So the distance between him and mirror is 6m.

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Subject :NSO    Class : Class 5

Raju, a farmer got his field checked for soil toxicity. The report showed high level of toxic chemicals in his field. How can these toxic chemicals in the soil be harmful?

AThey may enter any nearby waterbody due to runoff and cause algal bloom.
BThey are absorbed by food plants growing in the soil making them unfit for consumption.
CThey may get evaporated in the air causing air pollution.
DBoth A and B


Answer is B not D

Ans 1:

Class : Class 5
but the answer you have said is both A and B? IT SHOWS ANSWER = D

Ans 2:

Class : Class 5
SORRY ABOUT THE MISUNDERSTANDING

Ans 3: (Master Answer)

Class : Class 1

D

If these toxic chemicals enter the nearby waterbodies, they cause the microalgae population in the water-body to grow uncontrollably, causing algal bloom. These algae lower the oxygen levels in the water and cause harm to aquatic life. Toxic chemicals mixed with soil and water are absorbed by food plants and they become unfit for consumption. Toxic chemicals in the soil will cause soil pollution and water pollution. They will not cause air pollution.

 


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Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Class : Class 1

D

Reusing old cans, bottles and newspapers means you won’t be buying new ones from market. This will help to conserve natural resources that are used for making new cans, bottles and newspapers. So, this will help to control environmental pollution.


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Subject :NSO    Class : Class 8

Ans 1:

Class : Class 8
Testes

Ans 2:

Class : Class 8
Testes which is the primary sex organ in male reproductive system, produces the male gamete sperm as well as male hormone Testosterone

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6
options given are wrong

Ans 2: (Master Answer)

Class : Class 1

D

Ploughing the field(d)→Adding fertilisers to the field(b)→Sowing the seeds(e)→Irrigation of crops(a)→Spraying pesticides(c)


Ans 3:

Class : Class 5
correct answer isd

Ans 4:

Class : Class 8
D

Ans 5:

Class : Class 7
D is the answer to this question

Ans 6:

Class : Class 8
How is Fig. (b) Adding fertilisers to field? https://www.sofolympiadtrainer.com/forum/user/467395 Pls. reply

Ans 7:

Class : Class 1
I would have known the answer if there was a clearer pic

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