National Science Olympiad Forum By SOF Olympiad Trainer - Page 535

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Subject :NSO    Class : Class 4

The given statements which summarise the process of digestion are not given in a correct sequence. Arrange them in sequence and select the correct option.
P. Absorption of water
Q. Churning of food and addition of digestive juices
R. Mixing with saliva
S. Complete digestion of food and absorption of nutrients
T. Expulsion of faeces

A R → Q → S → P → T
B R → S → Q → P → T
C R → Q → P → S → T
D R → P → Q → S → T


Ans 1:

Class : Class 4

Ans 2:

Class : Class 9
option A

Ans 3:

Class : Class 6

Ans 4:

Class : Class 5

Ans 5:

Class : Class 5
The correct answer is option A.

Ans 6:

Class : Class 4

Ans 7:

Class : Class 7

Ans 8:

Class : Class 3
The graph X-Axis is not describing digestive system it is describing four components of food which are carbohydrates, proteins, fats, and vitamins and minerals. So, vitamins and minerals are same before digestion and after digestion. answer is S.

Ans 9:

Class : Class 4
i am dr manali parmar

Ans 10:

Class : Class 4
the correct answer is: A

Ans 11:

Class : Class 7
A is the correct answerWhen food is taken in the mouth, it is chewed and gets mixed with saliva secreted in the mouth (R). Once swallowed, the food moves through the oesophagus into the stomach where churning and digestion of food with digestive juices occurs (Q). The semi-digested food then moves into the small intestine where complete digestion as well as absorption of nutrients occur (S). From the undigested food, the water is absorbed in the large intestine (P). After this, the undigested food is expelled through the anus in the form of faeces (T).

Ans 12:

Class : Class 6

Ans 13:

Class : Class 7
The correct answer is A

Ans 14:

Class : Class 5

Ans 15: (Master Answer)

Class : Class 1

The correct answer is A.

When food is taken in the mouth, it is chewed and gets mixed with saliva secreted in the mouth (R). Once swallowed, the food moves through the oesophagus into the stomach where churning and digestion of food with digestive juices occurs (Q). The semi-digested food then moves into the small intestine where complete digestion as well as absorption of nutrients occur (S). From the undigested food, the water is absorbed in the large intestine (P). After this, the undigested food is expelled through the anus in the form of faeces (T).


Ans 16:

Class : Class 7

Ans 17:

Class : Class 4

Ans 18:

Class : Class 5

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Subject :NSO    Class : Class 4

In a research, it is proved that in old age one should take more quantity of proteins in diet than any other group of food. Which of the following justifies this?

A Proteins help to repair and build muscles. In old age, muscle growth increases, hence protein intake should be more.
B Proteins help to repair and build muscles. In old age, muscles become weak, hence protein intake should be more.
C Proteins give energy to the body. In old age, the body needs more energy to work, hence protein intake should be more.
D Proteins give energy to the body. In old age, the body uses stored fat hence, protein intake should be more.


Ans 1:

Class : Class 8

Ans 2: (Master Answer)

Class : Class 1

The correct answer is B.

 


Ans 3:

Class : Class 4

Ans 4:

Class : Class 6

Ans 5:

Class : Class 6
B. Protein intake should be more. It repair and build muscle

Ans 6:

Class : Class 5
Proteins act like building blocks of our body

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Subject :NSO    Class : Class 2

Ans 1: (Master Answer)

Class : Class 1

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Subject :NSO    Class : Class 2

Ans 1: (Master Answer)

Class : Class 1

Please visit our website- http://www.sofworld.org or call us at  0124-4951200 (Landline No), 9312680855, 9312680857 (Mobile:).


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Subject :NSO    Class : Class 5

A student investigates erosion using four kinds of equal amount of earth materials: top soil, clay, sand and soil planted with grass. Equal amounts of water is allowed to flow from the surface of each type of earth material. The water is then separated out from the earth material with the help of a filter. The given figure shows the amounts of earth material that are collected. The results of this investigation best support which conclusion?


ATop soil is easily eroded.
BSand has a smooth texture.
CWater travels fastest through soil planted with grass.
DWater drains most quickly through clay.


Can you please explain.

Ans 1:

Class : Class 5
top soil is easily eroded (a)

Ans 2:

Class : Class 7
most soil is in A so it is not C is the answer

Ans 3:

Class : Class 8
how?

Ans 4:

Class : Class 4
answer a soil erosion will occur

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Subject :NSO    Class : Class 9

Ans 1:

Class : Class 6
Ans. is A sublimation

Ans 2:

Class : Class 9
Sublimation because it is the process of change of state of matter from solid to gas without changing into liquid state.

Ans 3:

Class : Class 9
The answer is A.sublimation

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Subject :NSO    Class : Class 9

Which of the following statements about the given experimental set-up is/are incorrect?

I. It is used to separate a mixture of two or more miscible liquids for which the difference in boiling points is more than 25 K.
II. It is used for the separation of different gases from air.
III. It is used to separate acetone and water from their mixture.
IV. It is based on the principle of repeated cooling and condensation of vapours by providing surface for the vapours.

A I only
B III and IV only
C I and II only
D I and III only


Ans 1:

Class : Class 9
yes it 1 and 3 only

Ans 2:

Class : Class 9
Fractional distillation is used to separate liquids with less than 25 K difference in boiling points.

Ans 3:

Class : Class 9
3 and 1 only

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Subject :NSO    Class : Class 8

Ans 1: (Master Answer)

Class : Class 1

The correct answer is D

The electonic configuration of manganese (atomic number=25) is 1s2 2s2 2p6 3s2 3p6 3d5 4s2


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Subject :NSO    Class : Class 4

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Subject :NSO    Class : Class 6

Which of the following statements is correct ?
(i) The response of plant towards the Earth is called phototropism .
(ii) The ability of certain animals to blend with the surrounding, making them difficult to spot is called camouflage.
(iii) Whales and dolphins breathe in oxygen from water through gills.
(iv) Hibernation is an adaptation for escaping hot weather.

A(i) and (ii)
B(ii) and (iv)
C(i) and (iv)
D(iii) and (iv)


escaping hot weather is called aestivation . hibernation is escaping from cold weather .

Ans 1:

Class : Class 7
The answer is wrong

Ans 2:

Class : Class 6
none of the options are correct as the only correct statement mentioned here is (ii)

Ans 3:

Class : Class 9
Statement 4 is wrong because hibernation is done to escape cold weather not hot , so SOF is wwwwwwwwwwrrrrrrrrrrrrrrrrrrrooooooooooooooonnnnnnnnnnnnnnnngggggggggggggggggggg

Ans 4:

Class : Class 8
YES The correct answer is (A).

Ans 5:

Class : Class 8
Option A is Wrong

Ans 6:

Class : Class 8

Ans 7:

Class : Class 7
THE CORRECT ANSWER IS (A)

Ans 8:

Class : Class 8
Yes none of the options are correct

Ans 9:

Class : Class 7
Hibernation is done in winters not summers so OPTION A IS CORRECTTTTTT

Ans 10:

Class : Class 9
here , statement 1 , 3

Ans 11:

Class : Class 8
statement 4 is wrong and none of the options is correct as response of plants towards earth is called geotropism

Ans 12:

Class : Class 9
I WANT EXPLAINATION

Ans 13:

Class : Class 5
not a because The response of plant towards the sun is called phototropism

Ans 14:

Class : Class 9
bot

Ans 15:

Class : Class 8
none of the answers are correct

Ans 16:

Class : Class 7
THE CORRECT ANSWER IS A

Ans 17:

Class : Class 8
Okay manvi

Ans 18:

Class : Class 9
here all the statements are wrong except 3rd statement

Ans 19:

Class : Class 7
sof is wwwwwwwwwwwwwwwwwwwrrrrrrrrrrrrrrrrrrrrrrrrrroooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooonnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnngggggggggggggggggggggggggggggggggggggggggggg

Ans 20:

Class : Class 3
none of the options are correct

Ans 21:

Class : Class 7
sof wrong ans there should be option like:only ii is correct

Ans 22:

Class : Class 9

Ans 23:

Class : Class 8
According to me Statement 2 is correct

Ans 24:

Class : Class 9
option 4 if wrong. pls Chk soF other thn that all are correct .

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