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Assertion:- If earth did not have atomos...

Assertion:- If earth did not have atomosphere, its average surface temperature would be lower than what it is now.
Reason:- Greenhouse effect of the atmosphre would be absent, if earth did not have atmosphere.

A

both, Assertion and Reason are true and the Reason is the correct explanation of the Assertion.

B

both, Assertion and Reason are true but Reason is not a correct explanation of the Assertion.

C

Assertion is true but the Reason is false.

D

both, Assertion and Reason are false.

Text Solution

Verified by Experts

Both, the assertion and reason are true, and the latter is correct explanation of the former.
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Assertion : If earth did not have atmosphere, its average surface temperature would be lower than what it is now Reason : Green house effect of the atmosphere would be absent, if earth did not have atomosphere.

If the earth did not have atmosphere, would its average surface temperautre be higher or lower than what it is now? Explain

A : If the earth did not have an atmosphere, its average surface temperature would have been lower. R : In the absence of atmosphere, the green house effect will be absent.

If the earth did not have an atmosphere, it would become intoleraby cold. Why?

Answer the following questions: (a) Long distance radio broadcasts use short-wave bands. Why? (b) It is necessary to use satellites for long distance TV transmission. Why? (c) Optical and radiotelescopes are built on the ground but X-ray astronomy is possible only from satellites orbiting the earth. Why? (d) The small ozone layer on top of the stratosphere is crucial for human survival. Why? (e) If the earth did not have an atmosphere, would its average surface temperature be higher or lower than what it is now? (f) Some scientists have predicted that a global nuclear war on the earth would be followed by a severe ‘nuclear winter’ with a devastating effect on life on earth. What might be the basis of this prediction? Answer the following questions: (a) Long distance radio broadcasts use short-wave bands. Why? (b) It is necessary to use satellites for long distance TV transmission. Why? (c) Optical and radiotelescopes are built on the ground but X-ray astronomy is possible only from satellites orbiting the earth. Why? (d) The small ozone layer on top of the stratosphere is crucial for human survival. Why? (e) If the earth did not have an atmosphere, would its average surface temperature be higher or lower than what it is now? (f) Some scientists have predicted that a global nuclear war on the earth would be followed by a severe ‘nuclear winter’ with a devastating effect on life on earth. What might be the basis of this prediction?

PRADEEP-COMMUNICATION SYSTEMS-Exercise
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  2. Statement-1: Short wave band are used for transmission fo radiowaves t...

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  3. Assertion:- If earth did not have atomosphere, its average surface tem...

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  4. Statemet-1: the electrical conductivity of earth's atmosphere increase...

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  5. Assertion: The surface wave propagation is used for medium frequency a...

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  6. Assertion: The television broadcasting becomes weaker with increasing ...

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  7. Assertion: The Microwave propagation is better than the sky wave propa...

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  8. Assertion: Satellite is an ideal platform for remote sensing. Reas...

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  9. Statement-1: Radio waves can be polarised. Statement-2: Sound waves ...

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  10. Statement-1: Television signals are propagated through sky waves. St...

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  11. Statement-I : Television signals are received through sky-wave propaga...

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  12. Statement-1 : Electromagnetic waves with frequencies smaller than the ...

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  13. Statement-1: Communication in UHF/VHF regions can be established by sp...

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  14. The question has statement - 1 and statement - 2 Of the four choices ...

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  15. What is meant by quantisation of charge ?

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  16. Why is the conductivity of n-type semiconductor greater than that of t...

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  17. How does one explain the emission of electrons from a photosensitive s...

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  18. A resistor of 5 Omega is connected in series with a parallel combinati...

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  19. Draw a circuit diagram of a meter bridge used to determine the unknown...

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  20. Under what situation a magnet suspended in a uniform magnetic field wi...

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