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Subject :NSO    Class : Class 7

Rihan takes an empty half litre plastic bisleri bottle. He opens the lid and fixes his mouth on the opening in such a way that there is no gap between the opening and his mouth. He observes that the bottle crushes inwards when he sucks some air out of the bottle. Which of the following statements is the reason for Rihan’s observation?

AAir pressure inside the bottle increases.
BAir pressure outside the bottle increases.
CAir pressure inside the bottle decreases.
DAir pressure outside the bottle decreases.


Ans 1:

Class : Class 7
Air pressure outside the bottle increases as while drinking the water, the air pressure inside the bottle is reduced as he drinks the water with a force acting towards his mouth. Due to this the amount of air inside reduces and there will be no force exerted on the inner walls of the bottle from the inside.

Ans 2:

Class : Class 7
Air pressure outside the bottle increases as while drinking the water, the air pressure inside the bottle is reduced as he drinks the water with a force acting towards his mouth. Due to this the amount of air inside reduces and there will be no force exerted on the inner walls of the bottle from the inside.

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 3

Select the best suitable means of communication to get informed or to inform others for the given situations (X, Y and Z).
X : Your sister’s marriage has been fixed and you want all your relatives and friends to be present at the wedding.
Y : Your grandfather, suddenly, suffered from a heart attack and your father is in his office.
Z : Incidence of tsunami had occurred in Japan.

X Y Z
A Radio E-mail Postcard
B Letter Telephonic call Newspaper
C E-mail Television Fax
D Fax Newspaper E-mail


Ans 1:

Class : Class 3

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Subject :NSO    Class : Class 5

Ans 1: (Master Answer)

Class : Class 1

C


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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
A

Ans 2:

Class : Class 6

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 6
Answer is D .Because the time is going on but no displacement.so we can also say that the body is in rest

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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 7
b

Ans 2:

Class : Class 6
b

Ans 3:

Class : Class 6
I think C can be the answer

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Subject :NSO    Class : Class 3

Ans 1: (Master Answer)

Class : Class 1

A


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Subject :NSO    Class : Class 8

Consider the following statements (a - d) each with one or two blanks.
I. In our body, __(1)__ is the longest cell while __(2)__ is the smallest cell.
II. Cell membrane in animal cells is __(3)__
III. Mitochondria is absent in ___(4)__
IV. __(5)__ are membraneless organelles of cell and are involved in synthesis of __(6)__
Select the correct option to fill any three or four blanks.

A1 - Neuron, 2 - PPLO, 4 - bacteria
B3 - Permeable, 5 - Ribosomes, 6 - proteins
C3 - Selectively permeable, 1 - Neuron, 4 - RBC
D3 - Impermeable, 4 - human RBC, 6 - lipids


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Subject :NSO    Class : Class 6

Ans 1:

Class : Class 6
d canbe the answer

Ans 2:

Class : Class 6
D option can be correct.

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