National Science Olympiad Forum By SOF Olympiad Trainer

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 5
C

Ans 2:

Class : Class 4
c

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 7
Opt. B is incorrect as the stigmas in wind pollinated flowers is dull colored.

Ans 2:

Class : Class 5

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Subject :NSO    Class : Class 5

Raman took four similar pots (with a hole at the base) each with equal amount of different type of soil. He then placed these four pots on four similar dishes and poured water slowly on each soil sample. He used a stopwatch to measure the time taken by water to reach the level, he had marked at the same height in each dish.

The results obtained by him were tabulated in the table shown here.
Which soil is the most suitable for a plant that thrives in sandy soil ?

AW
BX
CY
DZ


Ans 1:

Class : Class 4
Raman took four similar pots (with a hole at the base) each with equal amount of different type of soil. He then placed these four pots on four similar dishes and poured water slowly on each soil sample. He used a stopwatch to measure the time taken by water to reach the level he had marked at the same height in each dish. The results obtained by him were tabulated in the table shown . The soil whose particles are fine and are closely packed together will not have much space between the particles. So, water will pass slowly through such soil, and will take more time to reach the marked level. On the other hand, the soil whose particles are big and are loosely held together – like sandy soil - will have ample space between the particles. So, water will pass easily through such soil, and will take less time to reach the marked level. The table shows that the water has taken the least amount of time – 35 seconds – to pass through Soil Y and reach the marked level. That means Soil Y will be most suitable for the plant which thrives in sandy soil. Hence, the correct answer is Option C.

Ans 2:

Class : Class 7
answer should be y.

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Subject :NSO    Class : Class 6

Amit, Rahul and Naveen were given three glass slides I, II and III respectively and a white paper with a cross mark (×). Amit painted his glass slide with a light blue colour. Rahul painted his glass slide with a black paint and Naveen left his slide as it is. They put each of these slides over the mark.


--------(p)---------------(q)-----------(r)
Atransparent---translucent---opaque
Btranslucent---transparent---opaque
Ctranslucent---opaque--------transparent
Dopaque-------translucent----transparent


c

Ans 1:

Class : Class 7
The answer is opt. c

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Subject :NSO    Class : Class 6

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 4
C

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 4
good too good

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
Cat and Tiger both are from Cat family

Ans 2:

Class : Class 4
sanju very perfect

Ans 3:

Class : Class 4
C and D as they are from cat family

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Subject :NSO    Class : Class 8

Which of the following statements are correct about planet Venus?
(i) It rotates from west to east while the Earth rotates from east to west.
(ii) It shows phases just like the Moon.
(iii) It appears in the eastern sky before sunrise and in the western sky just after sunset.
(iv) It has no satellite of its own.
(v) It is the second brightest star in the night sky.

A(i) and (iii) only
B(i), (iii) and (v) only
C(ii), (iii) and (iv) only
D(i), (ii), (iii), (iv) and (v)


Ans 1: (Master Answer)

Class : Class 1
The correct answer is C.

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Subject :NSO    Class : Class 5

Ravi set up an experiment as shown below.

Which of the following holds true regarding set ups P and Q?

AIn set up P, the solution inside Visking tubing will become blue black at step II as all the starch is converted to simple sugars.
BIn set up Q, the solution inside Visking tubing will become blue black at step II as starch is not digested at all.
CIn set up P, the solution inside Visking tubing will become blue black at step II as starch is not digested by boiled amylase.
DIn set up Q, the solution inside Visking tubing will become blue black at step II as all the starch is converted to simple sugars by amylase.


c

Ans 1:

Class : Class 5

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