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Subject :NSO    Class : Class 7

Which of the following statements are correct?
(i) Time period of a simple pendulum is the time taken by the pendulum to complete one oscillation.
(ii) The area under the speed-time graph on time axis is the distance.
(iii) Heat is exchanged between two bodies if they have different amount of heat but have same temperature.
(iv) In an electrical circuit, short circuit occurs when a naked live wire and a neutral wire come in direct contact.
(v) When a light wave and a sound wave travel from air into water, their speeds are decreased.
a. (i), (ii) and (iv) only
b. (i), (ii) and (iii) only
c. (ii), (iii) and (iv) only
d. (iii), (iv) and (v) only
Given that average speed of the car is 60 km h–1.
What is the value of x?

A 120 km
B 180 km
C 240 km
D 720 km


the questions wrong, two questions are colliding

Ans 1:

Class : Class 7
There are 2 parts in this question which are not at all inter-related.The average speed (2nd part) question is the incomplete question of Q.10

Ans 2:

Class : Class 8
How is the first part of the question related to the second part?

Ans 3:

Class : Class 8
correct options are not given

Ans 4:

Class : Class 9
The question has a bug

Ans 5:

Class : Class 9
NA

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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
Pls explain!

Ans 2:

Class : Class 5
The correct answer is D because when sun heats the land air rises up from the land so the option 4 is also correct , hence D is correct option

Ans 3:

Class : Class 4
CORRECT ANS IS A

Ans 4:

Class : Class 4
the correct answer is : B

Ans 5:

Class : Class 6
The answer is B .

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
d

Ans 2:

Class : Class 7

Ans 3:

Class : Class 4
The answer is D because water, on heating changes to steam,steam on cooling changes to water, water on cooling changesto ice and ice on heating changes to water.Hence,X-steam,Y-water Z-ice

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7
Wind speed, temperature, and humidity are all required for the formation of a cyclone.

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Subject :NSO    Class : Class 7

Read the following statements carefully and select the option which correctly identifies true (T) and false (F) ones.

(i) The seasonal movement of the complete population of animals from one area to another is termed migration.
(ii) Heavy and solid bones help penguins to swim through water at a speed up to 15 miles per hour.
(iii) Toucans have four clawed toes in each leg, two in front and two at the back.
(iv) Most rainforests lie between the Tropic of Cancer and the Tropic of Capricorn, that is why they are often called as tropical rainforests.

(i) (ii) (iii) (iv)
A F T T T
B T T F T
C T F T T
D F F F T


Ans 1:

Class : Class 7

Ans 2:

Class : Class 7

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Subject :NSO    Class : Class 7

Ans 1:

Class : Class 7

Ans 2:

Class : Class 5

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Subject :NSO    Class : Class 3

Ans 1:

Class : Class 3
A

Ans 2: (Master Answer)

Class : Class 1

A

Granite is very hard to break while chalk can be easily powdered using hands.


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Subject :NSO    Class : Class 4

Ans 1:

Class : Class 4
the answer is : C

Ans 2:

Class : Class 4
the answer is : C

Ans 3:

Class : Class 5
C C C

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Subject :NSO    Class : Class 6

Read the following statements.
(i) Air dissolved in water cannot be removed from it.
(ii) Density of air decreases with increasing altitude.
(iii) Air is an element that surrounds the Earth and makes it hospitable for living organisms.
(iv) Air helps in pollination of several flowers and in the dispersal of seeds.
Which of the above statements are correct?

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


Ans 1:

Class : Class 6
No ans is not D it's B because air is a mixture not an element.

Ans 2:

Class : Class 7
ans is not option D as air is not an element , air is a mixture of many elements and compounds......further more statement 2 is correct as air density decreases with increasing altitude i.e air density decreases with increase in height

Ans 3:

Class : Class 8
answer is D, air density decreases on increse in height

Ans 4:

Class : Class 6

Ans 5:

Class : Class 6
Answer is D.

Ans 6:

Class : Class 7

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Subject :NSO    Class : Class 5

Ans 1:

Class : Class 6

Ans 2: (Master Answer)

Class : Class 1

C

The layer of the Earth, which is made up of solid and molten rocks and contains magnesium and iron is mantle, and is represented by R. Earth's mantle is made up of rock and molten lava containing silicon, iron, magnesium, aluminium, oxygen and other minerals.


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