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Subject :NSO    Class : Class 6

Which of the following statements are incorrect?
(i) About 90% of the ozone in our atmosphere is contained in stratosphere.
(ii) The warmest parts of our atmosphere are located in mesosphere.
(iii) Commercial passenger aircrafts usually fly in lower troposphere.
(iv) Satellites orbit around the Earth in thermosphere.

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


planes fly in low troposphere is correct to confirm you can search on google

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 7

Different types of changes are listed as :
P - Physical, reversible
Q - Physical, irreversible
R - Chemical, irreversible
S - Both physical and chemical
Some common changes around us are
(i) Decomposition of old leaves
(ii) Burning of a candle
(iii) Shredding of paper
(iv) Melting of an ice cream
Which of the following represents the correct match for the given changes?

AP - (iii), Q - (ii), R - (i), S - (iv)
BP - (iv), Q - (iii), R - (i), S - (ii)
CP - (iv), Q - (iii), R - (ii), S - (i)
DP - (i), Q - (ii), R - (iii), S - (iv)


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Subject :NSO    Class : Class 2

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Subject :NSO    Class : Class 8

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7

Ans 2:

Class : Class 8

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 4
A .

Ans 2:

Class : Class 4
A plane taking off is louder than construction site . So correct answer is A .

Ans 3:

Class : Class 3
a

Ans 4:

Class : Class 3
a

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Subject :NSO    Class : Class 6

Read the given statements and select the correct option.
Statement 1 : Animals cannot take nitrogen directly from atmosphere rather they obtain it from plants they eat.
Statement 2 : Plants also cannot take nitrogen directly from atmosphere, rather free living or symbiotic nitrogen fixing bacteria present in soil convert atmospheric nitrogen into soluble nitrogen compounds that can be used by plants.

ABoth statements 1 and 2 are true and statement 2 is the correct explanation of statement 1.
BBoth statements 1 and 2 are true but statement 2 is not the correct explanation of statement 1.
CStatement 1 is true but statement 2 is false.
DBoth statements 1 and 2 are false.


Ans 1:

Class : Class 6

Ans 2:

Class : Class 6

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Subject :NSO    Class : Class 9

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Subject :NSO    Class : Class 8

In a village, farmers started using DDT as pesticide in their crop fields, located nearby river. Given table shows the concentration of DDT as found in tissues of various organisms present in that river.

Which of the following option shows the correct order in which these organisms are linked in a food chain?

AI → III → V → II → IV
BI → V → III → II → IV
CIV → II → III → V → I
DII → IV → V → III → I


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