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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 5

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Subject :NSO    Class : Class 8

The characteristics of different fibres are listed as
W : I am strong, elastic, light and burn slowly.
I shrink on heating and form hard beads with smell of burning hair.
X : I burn completely leaving no residue.
Y : I can be woven like silk fibres and dyed in a wide variety of colours. I burn quickly with a smell of burning paper.
Z : I do not get wrinkled easily. I burn slowly and produce black smoke.
W, X, Y and Z are respectively

ATerylene, rayon, cotton and nylon
BBakelite, nylon, rayon and cotton
CMelamine, PVC, nylon and rayon
DNylon, cotton, rayon and polyester.


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Subject :NSO    Class : Class 7

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Subject :NSO    Class : Class 1

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Subject :NSO    Class : Class 5

Read the given statements regarding types of rock.
(i) P is used by dentists for polishing teeth.
(ii) Q is rich in mineral calcium carbonate and is used for making cement.
(iii) R is used for making statues and floorings.
Select the option which correctly identifies the category of rocks to which P, Q and R belongs.

P Q R
A Metamorphic
rock
Igneous rock Sedimentary
rock
B Igneous rock Metamorphic
rock
Sedimentary
rock
C Igneous rock Sedimentary
rock
Metamorphic
rock
D Sedimentary
rock
Metamorphic
rock
Igneous rock


Powdered form of pumice is used by dentist to polish teeth. It is a type of igneous rock (P). Limestone is rich in calcium carbonate and it is used for making cement. It is a type of sedimentary rock (Q). Marble is used to make statues and floorings. It is a type of metamorphic rock (R) so,correct answer is option C.

Ans 1:

Class : Class 5
Powdered form of pumice is used by dentist to polish teeth. It is a type of igneous rock (P). Limestone is rich in calcium carbonate and it is used for making cement. It is a type of sedimentary rock (Q). Marble is used to make statues and floorings. It is a type of metamorphic rock (R) so,correct answer is option C.

Ans 2:

Class : Class 5
Powdered form of pumice is used by dentist to polish teeth. It is a type of igneous rock (P). Limestone is rich in calcium carbonate and it is used for making cement. It is a type of sedimentary rock (Q). Marble is used to make statues and floorings. It is a type of metamorphic rock (R) so,correct answer is option C.

Ans 3:

Class : Class 5
Metamorphic rock

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3

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Subject :NSO    Class : Class 3

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Subject :NSO    Class : Class 3

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